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Science Works! 1
TEXTBOOK

Science Works! 1
Textbook

Philippine Copyright 2012 by DIWA LEARNING SYSTEMS INC
All rights reserved. Printed in the Philippines

Editorial, design, and layout by University Press of First Asia

No part of this publication may be reproduced or transmitted in any form or by any means electronic or mechanical,
including photocopying, recording, or any information storage and retrieval systems, without permission in writing
from the copyright owner.

Exclusively distributed by
DIWA LEARNING SYSTEMS INC
4/F SEDCCO 1 Bldg.
120 Thailand corner Legazpi Streets
Legaspi Village, 1229 Makati City, Philippines
Tel. No.: (632) 893-8501 * Fax: (632) 817-8700

ISBN 978-971-46-0287-8

Author
Khristine Joy G. Gersabelino received her bachelor’s degree in psychology major in educational
psychology stream, cum laude, from Philippine Normal University. She is a member of the Association
of Science Teachers and Educators of the Philippines. Currently, Ms. Gersabelino is a grade school
science teacher at Miriam College.

Consultant
Antom V. Revilla finished his master’s degree in biology from Centro Escolar University. He obtained
his bachelor’s degree in forestry, cum laude, from the University of the Philippines–Los Baños. Mr.
Revilla was a supervisor of Christian Bible Baptist School of Excellence and Development. He has
taught general science, biology, and scientific research at San Beda College–Manila since 1991.

To the Pupil
Discovery and learning are part of your everyday life.
Whether you are playing or studying, you are able to understand
and learn about the things around you. This book, Science
Works! 1, is meant to teach you different science concepts and
skills in an exciting way.
Science Works! 1 will help you to be actively involved in
learning concepts about the human body, plants, animals, Earth,
sun, and many more. Science concepts and skills are best learned
by engaging in activities and performing experiments. These
activities will lead you to create your own questions, conduct
your own investigations, and develop your own solutions to
problems through reasoning and observation.
This book, which has been designed especially for you,
includes the following components:
Sci-tionary presents an activity that introduces you to
words or terms that you will encounter in the lesson.
Jump Start lists a set of guide questions that are expected
to be answered as you go along the lesson.
Feed Your Mind provides the discussion of the science
concepts to be learned in the lesson.
Science in Action presents experiments, cooperative
learning activities, and individual or group projects that
will apply the science concepts you have learned in Feed
Your Mind.

Learning Area Integration relates a particular
science lesson to the other subject areas such as English,
mathematics, and social studies. This will help you
appreciate how science is applied to other fields of study.
Rundown lists the important science concepts that
should be remembered at the end of each lesson.
Brain Challenge presents 5- to 10-item quiz about the
lesson.
Chapter Checkup includes exercises that cover all the
topics discussed in a chapter.
Your Move presents an activity that will allow you to
apply what you have learned to a real-life situation.
Aside from the components given above, some lessons in
this book include these additional sections:
Incredible Facts presents interesting or extraordinary
facts and trivia related to the science concept.
Proud Pinoy features notable Filipino people, culture,
products, and inventions.
Sci-tainment includes fun games and activities related
to the science concept.
Exploring the Web provides links to online activities or
exercises that you may access to help reinforce and enrich
your learning.
Begin your journey and discovery now! Use what you will
learn in this book and apply them to your everyday life.

Table of Contents
Unit 1 The Body You Are Gifted With
Chapter 1 Learning about Your Body and Your Needs ............................... 2
Lesson 1 Parts of Your Body .............................................................................2
2 Your Sense Organs and How Your Body Parts Work ........................... 7
3 Caring for Your Body ....................................................................... 13
4 Healthy Food for a Healthy You ....................................................... 18
5 You Need Air, Water, and Sunlight ................................................... 25
6 Clothes for Your Protection .............................................................. 29
7 A Clean and Safe House ................................................................... 34
8 Your Body Needs Exercise, Recreation, Rest, and Sleep .................... 39
9 Love and Care for a Healthy You...................................................... 44
Chapter Checkup ................................................................................................ 48
Chapter 2 Learning about Your Growth .................................................... 49
Lesson 1 Your Height and Weight................................................................... 49
2 Likeness among Growing Children .................................................. 54
3 Differences among Growing Children .............................................. 59
4 Keeping Oneself Safe ....................................................................... 63
Chapter Checkup ................................................................................................ 68
Your Move .......................................................................................................... 71

Unit 2 Plants and Animals around You
Chapter 3 Know the Plants around You.................................................... 73
Lesson 1 Parts of a Plant ................................................................................ 74
2 Kinds of Plants ................................................................................ 80
3 Describing and Comparing Plants .................................................... 84
4 Places Where Plants Live ................................................................. 88
5 How Plants Grow ............................................................................ 92
6 Importance of Plants ........................................................................ 97
7 Needs of Plants .............................................................................. 101
Chapter Checkup .............................................................................................. 105
Chapter 4 Know the Animals around You ...............................................107
Lesson 1 Groups of Animals ......................................................................... 107
2 Animal Body Parts and Their Uses................................................. 113
3 Animals Move in Different Ways ................................................... 118
4 Places Where Animals Live ............................................................ 123
5 How Animals Grow ....................................................................... 128

6 Why Animals Are Important .......................................................... 133
7 Needs of Animals .......................................................................... 138
Chapter Checkup .............................................................................................. 143
Your Move ........................................................................................................ 145

Unit 3 Matter, Energy, and Force
Chapter 5 Discover Matter .......................................................................148
Lesson 1 Characteristics of Matter ................................................................ 148
2 Solid, Liquid, and Gas .................................................................... 152
Chapter Checkup .............................................................................................. 156
Chapter 6 Energy in Action .....................................................................158
Lesson 1 Heat .............................................................................................. 158
2 Light ............................................................................................. 163
3 Protecting Oneself from Too Much Heat and Light ........................ 168
4 Sound ............................................................................................ 173
5 Ways to Lessen Noise Pollution ..................................................... 176
Chapter Checkup .............................................................................................. 180
Chapter 7 Forces on the Move .................................................................182
Lesson 1 Push and Pull ................................................................................ 182
2 What Force Can Do ....................................................................... 187
3 Other Forces That Make Things Move ........................................... 191
Chapter Checkup .............................................................................................. 196
Your Move ........................................................................................................ 199

Unit 4 Earth and Beyond
Chapter 8 Earth: Our World, Our Home ................................................202
Lesson 1 Earth Up Close .............................................................................. 202
2 Earth’s Landforms ......................................................................... 206
3 Earth’s Bodies of Water ................................................................. 211
4 Earth’s Air ..................................................................................... 215
5 Kinds of Weather ........................................................................... 218
6 Earth’s Resources .......................................................................... 223
7 Protecting Earth ............................................................................. 227
Chapter Checkup .............................................................................................. 231
Chapter 9 The Sky ..................................................................................233
Lesson 1 The Sun ......................................................................................... 233
2 The Moon and the Stars ................................................................. 237
3 Daytime and Nighttime.................................................................. 241
Chapter Checkup .............................................................................................. 245
Your Move ........................................................................................................ 247
Bibliography...................................................................................................... 249

The Body You
Are Gifted With 1 UNIT

The picture shows ________________________________________.
Before, I know that _______________________________________.

Y ou do science every day. When you play, you get to
know what your body can do. You also know more about
the things around you with the help of your body. In this unit,
you will learn more about your body, its parts, and its changes
as you grow.

CHAPTER 1

Learning about Your Body and
Your Needs
Lesson 1 Parts of Your Body

Complete the words. Write the missing letter on each
blank. A clue is given for each word.
1. H ____ ____ ____ This is the upper part of your
body where you can find your ears and eyes.
2. T ____ U ____ ____ This is the middle part of your
body where you can find your shoulders and chest.
3. L ____ M ____ ____ These are the parts of your
body that include your arms and legs.

In this lesson, you will be able to answer the following
questions:
1. How well do you know your body?
2. Can you name the different parts of your body? What
are they?

Science Works! 1

Carla, Nilo, Alice, and Ben are good friends. They live in
the same neighborhood. They love to do things together. On
a fine day, they play at the park with other children. Their
favorite games are hide-and-seek and piko.
Carla, Nilo,
Alice, and Ben are
classmates, too.
At school, they
draw, write, sing,
and dance together
with their other
classmates.
Carla, Nilo,
Alice, and Ben can
do many things
every day. What
helps them do
different activities? Can you do the things that they can do?
What other activities do you do every day?
Children like you can do many things with their body
parts. What are these body parts?
Your body is divided into three big groups. These are the
head, trunk, and limbs.
What are the parts of your head?
Look at yourself in front of a mirror. The top part of your
body is the head. Your hair grows from the top of your head.
The uppermost part of your face is your forehead. Below your
forehead are your eyebrows, eyes, and eyelashes.

The Body You Are Gifted With

At the center of your face is your nose. On opposite sides,
beside your nose, are your cheeks. Below the nose you can
find your mouth, lips, and chin. Your teeth and tongue are
inside your mouth. Your ears are on the left and right sides of
your head.

hair forehead
eyebrow eye
eyelash nose
ear mouth
shoulder neck
elbow
arm
lip
chin chest
waist
wrist
hand leg

fingers knee

abdomen toes

ankle foot

The middle part of your body is the trunk. It is
sometimes called torso. The trunk has many parts. These are
the shoulders, chest, abdomen, and waist. The neck connects
the head and the trunk.
You have two upper limbs and two lower limbs. The
parts of the upper limbs are the arm, elbow, wrist, hand, and
fingers. The parts of the lower limbs are the leg, knee, ankle,
foot, and toes.
Science Works! 1

Using My Body Parts
Objective: Identify the body parts used in doing different
activities.
Materials: pencil, eraser, ripe mango, banana
Procedure:
1. Choose a partner. Decide who will be pupil A and
pupil B.
Pupil A – will bring a ripe mango
Pupil B – will bring a banana
2. Observe the characteristics of each fruit. Write your
observations by completing the table below.
3. Exchange fruit with your partner and do number 2
again.
Characteristics
Fruit
Color Size Shape Feel Odor
Banana
Mango

Questions:
1. What body parts did you use to describe the fruits?
2. What do you think will happen if your body parts are
not working well? Give an example.


• The body has three big groups. These are the head, the
trunk, and the limbs.
• The head has the following parts: hair, forehead, eyes,
eyebrows, eyelashes, ears, nose, lips, chin, and mouth.
• The trunk has the following parts: shoulders, chest,
abdomen, and waist.
• You have two upper limbs and two lower limbs.
• The neck connects the head and the trunk.

Put a check () mark in the correct box where each body
part is found.
Body Part Head Trunk Limbs

1

2

3

4

5

Science Works! 1

Lesson 2 Your Sense Organs and How Your Body
Parts Work

Match the items in column A with the items in column B.
Write the letter of your answer inside the circle.
A B
1. The body parts that can help a. eye
you see, hear, taste, smell, or b. limbs
feel the things around you
c. neck
2. The body parts that help you d. sense
move things organs
3. The body part that lets
you see things in your
surroundings

questions:
1. What are the five sense organs?
2. How do the parts of your body work together?
3. How do these parts help you in doing your work?


Ben, Alice, Carla, and Nilo love to play different kinds of
games.
Ben and Nilo love to play basketball. Ben can throw the
ball with full strength. Nilo can easily catch it with his hands.
Carla and Alice like to play jump rope. Both
of them can jump high.
Ben, Alice, Carla,
and Nilo use their
sense organs when
they play. Their
different body parts
let them do many
activities, too.
You have five
sense organs. These
are your ears, eyes,
nose, skin, and
tongue. These organs
help you know and
describe the things
around you. Your ears let you hear soft and loud sounds. Your
eyes let you see the trees, flowers, clouds, and animals. Your
nose helps you smell the odors around you like the fragrant
sampaguita flowers in the park or the delicious adobo in the
kitchen. Your tongue lets you taste food. Your skin helps
you touch or feel objects. You can tell if an object is smooth,
rough, soft, or hard because of your skin.

Science Works! 1

Incredible Facts
When a part of the body such as the leg is badly damaged
because of an accident or a disease, doctors may replace it with
an artificial one. Doctors use strong plastic and light metal to
replace a damaged leg.

Aside from your senses, your other body parts also work
to help you do your daily activities. Your body parts work
together to let you do many things. Your hands and arms help
you move objects from one place to another. Your legs and
feet help you move around by walking and running. Your
eyes and hands let you read and hold a book. Can you think
of other activities that you can do with the help of your body
parts?

What Will Happen If I Lose My Sight?
Objective: Identify the body parts that can be used when
one body part cannot be used.
Materials: handkerchief, basketball, pair of cymbals,
drum, whistle, xylophone
Procedure:
1. Form a group with six members. Your teacher will
assign an object (a basketball, a pair of cymbals, a
drum, a whistle, or a xylophone) to one member of
your group. This member will serve as your team
leader.


2. The rest of the members of the group will be
blindfolded using a handkerchief. The blindfolded
members will be guided by your teacher to an area
in the classroom. (You may also do this activity in the
gym with your teacher’s guidance.) The team leaders
with the different objects will be assigned to different
places in the classroom.
3. On your teacher’s signal, the team leaders will
produce sounds using the objects given to them. The
blindfolded members must then look for their own
group as they hear the sounds.
4. The first group that can regroup at the shortest time
will be the winner.
Questions:
1. How did you feel when you were blindfolded?
2. What senses did you use to look for your group?
3. How did you feel when you finally found your
group?
4. For the team leader: What body parts did you use
when you made sounds using the object given to you?

English
Helen Keller was a brave American woman who was able to
achieve success despite being blind and deaf. Helen was able
to read with the help of her teacher, Anne Sullivan. She received
academic awards when she finished college. Helen also became
a famous writer. She wrote a total of 12 books and many articles.
Her most famous book is entitled The Story of My Life.

10 Science Works! 1

• The five sense organs are the eyes, ears, nose, tongue, and
skin. These sense organs refer to body parts that make a
person see, hear, smell, taste, and feel things.
• Body parts work together to help people do different
activities.

A. Which sense organ(s) do you use in each activity? Put a
check () mark in the correct column(s).
Sense Organs
Activity

The Body You Are Gifted With 11

B. What are the body part(s) used in each activity? Put a
check () mark in the correct column(s).

Activity Head Arms Hands Legs Feet
1

2

3

4

5

1 Science Works! 1

Lesson 3 Caring for Your Body

Write the missing letters to complete the words in the
puzzle. Read the given clues to help you answer each number.

Clues:
1
s c 2
n 1. It makes you feel
weak. Because of
t this, you cannot play
3 g s and work.
2. These are substances
that make your body
e
strong and healthy.
3. They can harm your
t body and can cause
diseases like cough
and cold.

questions:
1. Why do you need to take good care of your body?
2. How should you take care of your body?


It is another day for school. When Nilo woke up, he did
not feel well. He sneezed and felt cold. His mother touched
his forehead and felt that he is hot. Nilo has fever.
Fever is a sign that something is wrong with your body.
When you are sick, you must stay at home to avoid spreading
your sickness. How can you protect yourself from diseases?
You must always take a bath every day. Taking a bath
does not only make you feel fresh. It also washes away the
germs that might make you sick.
Washing your hands regularly is very important. Your
hands can easily pick up germs. You must wash your hands
before and after eating. You also need to wash your hands
after using the bathroom.
Follow these steps on how to wash your hands properly.

1 Wet your hands. 2 Apply soap and rub
your hands together
for 20 seconds.

1 Science Works! 1

3 Rinse both hands for 4 Dry your hands.
10 seconds.

Eat also healthy foods like fruits, meat, and vegetables,
and drink lots of water. These can help protect you from
sickness. The food you eat gives you nutrients and energy that
your body needs. The water you drink can replace the water
you lost when you sweat and urinate.
After eating, you should always brush your teeth to keep
them healthy. Brush your teeth and tongue gently to remove
tiny bits of food left in between your teeth and the “bumps”
of your tongue.
You use different materials to clean your body. Are you
familiar with these cleaning materials? Can you tell for which
parts of the body these
cleaning materials are
used?
When using cleaning
materials, you should
ask for the help of an
adult. These cleaning
materials can harm your
body if not properly
used.

Two to Care
Objective: Identify ways on how to take care of the body.
Material: pencil
Procedure:
1. With a partner, read the sentences below.
2. Underline the sentences that tell about how to keep
the body clean.

Brush your teeth. Do not wash your hands.
Drink water. Play all the time.
Exercise every day. Take a bath every day.

• There are different ways of caring for the body. These
include taking a bath every day, washing hands regularly,
eating healthy foods, and brushing teeth after eating.
• Food provides the nutrients and energy that the body
needs to work well.
• Different cleaning materials are used to take care of the
body.

1 Science Works! 1

Encircle the picture that does not belong to the group.

1.

2.

3.

4.

5.


Lesson 4 Healthy Food for a Healthy You

Match the words in A with their meanings in B. Color the
correct pair with the same color.
A B

It is a chart that
shows how to eat the
chewing
correct amounts of
different food groups.

These are found in the
balanced food you eat. They keep
meal your body healthy.

It is the healthful
food combination of food
pyramid that gives the body the
nutrients it needs.

It is the breakdown
vitamins of food into smaller
pieces.

1 Science Works! 1

questions:
1. Why is food important?
2. What does food do to the body?

Carla, Nilo, Ben, and Alice like to eat together. Carla’s
favorite food is spaghetti. Nilo likes to eat biko and suman.
Ben loves to eat carrot cake. Alice’s favorite food is tinola. All
of them like to eat vegetables and fruits, too.
Eating healthy foods will make your body healthy and
strong. It is important to choose the right foods in the right
amount and eat them on time.
The foods you eat can be grouped into three big groups
called go foods, grow foods, and glow foods.

Go foods give you the
energy to do your daily tasks.
These foods are also known as
the energy-giving foods. Some
examples of go foods are bread,
cereal, rice, and pasta.


Grow foods give your
body the nutrients it needs.
These foods are called the body-
building foods. Grow foods
include meat, fish, eggs, beans,
nuts, cheese, and milk.

Glow foods are also called
the body-regulating foods. The
vitamins and minerals from these
foods make your skin healthy.
These nutrients are present in
fruits and vegetables. How often
do you eat fruits and vegetables?

Here are some of the vitamins and minerals that are good
for the body:
1. Calcium – This makes bones and teeth strong. Milk
and cheese are rich in calcium.
2. Vitamin A – This keeps the eyes in good condition.
Carrots are an excellent source of vitamin A.
3. Vitamin E – This keeps the skin healthy. Vegetable
oil and peanut butter contain vitamin E.
4. Vitamin C – This makes the body’s defense system
strong to fight against sickness such as common cold
and influenza (flu). Oranges, calamansi, and other
citrus fruits contain vitamin C.

0 Science Works! 1

Children like you should eat a balanced meal. Eating a
balanced meal means that you must always eat meals that
contain the three basic food groups.
Eating a balanced meal makes your body healthy and
strong. It helps protect you from any disease or sickness.
To know what makes up a balanced meal, nutritionists
(people who are experts in nutrition) designed the food
pyramid. A food pyramid serves a guide for people to have a
balanced meal each day. Look at the food pyramid below.

Eat just enough. Fats, oil, and sugar

Eat moderately.
Meat, poultry, dried
beans, and nuts

Eat more. Vegetables and fruits

Eat most. Rice and
other cereals,
bread, and
rootcrops

Water: At least eight glasses a day

Food Pyramid
Source: www.furi.dost.gov.ph/index.php?options=contenttask=viewid=1126


The foods found at the bottom of the food pyramid are
the foods that you should eat more often. These are bread,
cereal, rice, and pasta. The foods found at the top of the
pyramid are the foods that you should eat less often. These
foods are those that contain fats, oil, and sugar.

Proudly Pinoy
Pinakbet is a Filipino food. It is very nutritious because its
ingredients are mostly vegetables. The way pinakbet is cooked
differs in different places in the country. The ingredients also vary
depending on the available vegetables and other ingredients.
Ask your parents to cook pinakbet for you. Enjoy eating the
delicious and healthy pinakbet with your family!

Am I Eating the Right Foods?
Objective: Determine the right food to eat.
Materials: pencil, paper
Procedure:
1. For one week, record the meals you eat each day in
the chart on the next page.
2. Classify the foods you eat in each meal as go, grow,
or glow food.
3. Determine whether you are eating a balanced meal.
4. Show your record to your parents or guardian.
Together with them, answer the question on the next
page.

Science Works! 1

Afternoon
Day Breakfast Lunch Dinner
Snack

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

Question:
Are you eating a balanced meal each day?

Mathematics
You use your teeth when eating. When you were born, you
did not have any teeth yet. When you were two years old, you
started to grow 20 milk teeth. At the age of six, your milk teeth will
begin to be replaced by 32 permanent teeth. How many more
teeth will be added to your milk teeth? Do you have a complete
set of teeth already?


• The three basic food groups are the go, grow, and glow
foods.
• Go foods are energy-giving foods. Examples of these
foods are rice, pasta, and bread.
• Grow foods are body-building foods. Examples of these
foods are meat, cheese, and eggs.
• Glow foods are body-regulating foods. Examples of these
foods are fruits and vegetables.
• A balanced meal helps keep the body strong and healthy.

Write T if the sentence is true and F if it is false.
_____ 1. Go foods give the energy you need every day.
_____ 2. Glow foods help you have strong bones and
muscles.
_____ 3. Grow foods are called the body-regulating foods.
_____ 4. Your body needs vitamins and minerals to keep you
healthy.
_____ 5. Children like you should eat more chocolates every
day.
_____ 6. A balanced meal should include enough foods from
the three food groups.
_____ 7. The food pyramid shows that you should eat bread
and rice more often than sweets like candy and ice
cream.

Science Works! 1

Lesson 5 You Need Air, Water, and Sunlight

Look for the given words in the puzzle. Encircle each word
that you will find.

air clean oxygen safe sunlight water

s a t e r y d i o s j d e

b n s t y w m z x a c q t

w a t e r s c b y g h l o

v i h s u n l i g h t j u
b r l y f s a f e j l p w

h y u j c l e a n t y r f

question: Why does your body need clean air, safe water, and
enough sunlight?


It was a beautiful Saturday morning. Alice, Nilo, Carla,
and Ben went to the park. Nilo and Alice were running
around the park. Carla and Ben went up and down the slide.
After running, Alice and Nilo felt that they were
breathing really fast and feeling thirsty. So, they drank lots of
water.
Your body needs
clean and fresh air. Air
contains many different
gases. The gas needed
by your body is called
oxygen. Oxygen comes
from plants. The park
is one of the best places
to breathe in fresh and
clean air. There are
many trees and other
plants at the park. Can
you think of other places
where you can breathe in clean and fresh air?
Try holding your nose and stop breathing for 30 seconds.
Were you able to do it? How did you feel? What would
happen when a person’s supply of oxygen is cut off? Surely,
that person will pass out or worse, will die.
Breathing in dirty air is bad for your body. The air that
comes out from cars is dirty. It can make you sick. When you
are on the road and the air is thick with black or gray smoke
coming out of the cars, you should cover your nose with a
handkerchief.
Science Works! 1

Team Clean Air
Objective: Draw a picture that shows a way of keeping the
air clean.
Materials: short bond paper, crayons, pencil
Procedure:
1. Form a group with four members. Each member of
the group is assigned with a task.
Pupil A: Materials monitor – prepares the materials
needed for the drawing
Pupil B: Area monitor – sees to it that the work area
is kept clean and orderly
Pupil C: Peace-keeping monitor – makes sure that
the group is not noisy
Pupil D: Presenter – explains the drawing of the
group
2. Think of a simple way on how to keep the air clean.
3. Draw this way on a piece of bond paper. Make your
drawing neat and colorful.
4. Pupil D will present and explain the group’s drawing
to the class.
Aside from clean air, you also need safe drinking
water. Water refreshes your body. It washes away harmful
substances inside your body. You need to drink at least eight
glasses of water a day.


Sunlight is also needed by growing children like you.
Exposure to early morning sunlight helps the skin produce
vitamin D. This vitamin helps your bones to be strong.

• Clean and fresh air is needed by the body.
• Water refreshes the body.
• Sunlight helps the skin produce vitamin D, which makes
the bones strong.

Read the sentences carefully. Shade the happy face if the
sentence is correct.
1. Breathing in dirty air can make you healthy.

2. Keeping the air clean is important.

3. The air that comes out from cars is good for the body.

4. Sunlight helps the skin produce vitamin D.

5. Water washes away harmful substances in the body.

Science Works! 1

Lesson 6 Clothes for Your Protection

On the blank provided, write the correct vowel to
complete the name of the clothes you wear.

a e i o u

j __ ck __ t p __ nts p __ l __

questions:
1. How do clothes protect the body?
2. Why is it important to wear clean and proper clothes?

Carla is preparing for school. After she took a bath, she
felt the cold wind. Through the window, she saw that it is
raining outside. Her mother told her to put on her jacket
before she goes to school.


Wearing a jacket on a cold day can make
you feel warm. A jacket is just one of the
clothes you wear. Clothes are important.
Clothes are not only worn to make you look
good. They also protect your body from
harmful objects and the changing weather.
Wearing proper clothes keeps your body
safe.
There are different kinds of clothes that
you can wear. On a fine weather, it is best to
wear clothes made of thin fabric. These will
make you feel comfortable even if the day
gets hot. On a rainy day, you must wear thicker clothes such
as a jacket to protect your body from the cold wind.
The clothes that you wear also depend on your activities.
When you go to school, you wear your school uniform. When
you play with your friends in the
neighborhood, you usually
wear a sleeveless shirt and
short pants that allow you to
move freely. When you attend
parties or special occasions, you
sometimes wear formal clothes
such as a dress or a long-sleeved
polo. Sometimes, you are even
required to wear a costume.
What do you wear when you go
to church?

0 Science Works! 1

Dress Up for Health
Objective: Group clothes worn in different weather
conditions and occasions.
Materials: magazine or newspaper, scissors, glue
Procedure:
1. Form a group with four members.
2. Cut out pictures of different clothes from a magazine
or newspaper. (Caution: Be very careful when
handling the scissors. Make sure not to point them to
anyone.)
3. Paste the cutout pictures in the correct box. You may
use separate sheets of clean paper if your cutouts do
not fit in the boxes.

Rainy day Sunny day


Church

Civics and Culture

Clothing materials used to make clothes
come from different places in the country.
Two of the common natural materials used
for clothing are pineapple and abaca. Did you
know that the Philippines is one of the biggest
abaca producers in the world?

• Clothes protect the body from harmful objects and the
changing weather.
• The clothes you wear depend on the weather condition
and the occasion.

Science Works! 1

Where do you use the following clothes? Put a check ()
mark in the correct box.

Party/
Clothes Home School Church Beach Special
Event
1

2

3

4

5


Lesson 7 A Clean and Safe House

Complete the puzzle by writing the missing letters. Read
the clues given for each number.
Clues:
1. A room in the house
2 1
b d where you eat with
your family
3
l n 2. A room in the house
where you rest and
sleep
3. A room in the house
4
g g where you entertain
visitors
4. A part of the house
where a car is parked

questions:
1. What are the parts of a house? What is the use of
each part?
2. What should be done to make a house safe for
growing children?

Science Works! 1

Nilo helps his mom and dad in doing the household
chores during weekends.
When Nilo wakes up on weekends, his mother is always
in the kitchen preparing breakfast. The kitchen is where
nutritious meals are prepared and cooked. It is also where
dishes and utensils are washed and kept.
When the food is ready, Nilo helps his mother prepare
the food in the dining room. It is where the family eats their
meals. After eating, Nilo always wipes the table and sweeps
the floor.
After breakfast, everyone is ready to clean the house.
Nilo’s mother cleans the kitchen and the dining room. Nilo
helps his sister in cleaning the living room. This is where
the family entertains their visitors. Nilo wipes the appliances
with a clean rag. His sister sweeps and scrubs the floor.
Outside the house, Nilo’s dad starts cleaning the yard. He
also cleans the garage. This is where the car is parked. It is
also the place where Nilo keeps his bike.
After Nilo helps in cleaning their house, he cleans his
bedroom with the help of his older brother. The bedroom is
where Nilo rests and sleeps.
Do you help clean your house like Nilo does? Why do you
need to clean your house?
A house is the place where a family lives in. When you
are in your house, you feel safe because you are with your
family. A child like you needs a safe house to live in.
It is important to keep your house clean. By keeping it
clean always, harmful insects will not live in your house. You
also have fresh air when your house is clean.


How can you and your family make your house safe?
Look at the following pictures.

aste
Wet W
Dry Waste

Put locks on the doors of your Throw your wastes in the proper
house. trash cans.

Store harmful substances like Change the water in flower vases
pesticides in a cabinet where regularly.
children cannot reach them.

A house is important for a family. It protects you from the
changing weather and harmful things in your surroundings. It
is the duty of each family member to keep the house safe and
clean.

Science Works! 1

Can You Find Me?
Objective: Identify the objects that do not belong in the
dining room.
Materials: pencil, crayons
Procedure:
Below is the dining room in Nilo’s house. Identify which
objects do not belong in the dining room. Mark them with an
. Give a reason for each answer.

• A house protects people from the changing weather and
harmful things in the surroundings.
• It is the duty of each family member to keep the house
safe and clean.


Civics and Culture
In Batanes, the northernmost
part of the Philippines, the Ivatans live
in houses made of thick stonewalls
and lime, covered with thick layers of
cogon. This kind of house protects
the Ivatans from strong and frequent
typhoons that visit their province. Ivatan house
Source : http://www.visitmyphilippines.com/index.php?title=Batanesfunc=allpid=424tbl=0
(accessed on 17 May 2011)

Identify the part of the house that is described in each
number. Write the letter of the answer on the blank.

a. bedroom b. living room c. kitchen
d. dining room e. garage

______ 1. It is where the family eats nutritious meals.
______ 2. It is where you rest and sleep.
______ 3. It is where the family prepares and cooks food.
______ 4. It is where the family entertains visitors.
______ 5. It is where the family parks the car.

Science Works! 1

Lesson 8 Your Body Needs Exercise, Recreation,
Rest, and Sleep

Look for the given words in the puzzle. Encircle each
word that you will find.

exercise nap recreation rest sleep

p v e x e r c i s e
l r f s d t y l t w
r e c r e a t i o n
m s q w z x c v i a
Y t u h j s l e e p

questions:
1. Why is there a need to have enough rest and sleep?
2. Why are exercise and recreation good for the body?


One morning, Ben wakes up very happy. He had a good
night’s sleep and rest. Today is also his biking day with
Nilo. They will go to the park to bike. Biking is their form of
exercise.
Like Ben and Nilo, growing children like you need rest
and exercise.
After doing your activities, how do you feel? Whenever
you feel tired, it means that you have lost a large amount of
energy. To regain the lost energy, you need to rest. When you
rest, you give your muscles and the other parts of your body
a chance to relax, too. Resting helps keep the body in good
shape.
The best way to rest is by sleeping. A lot of things happen
in the body when you sleep. During sleep, your body grows.
It is also during this time that wounds and cuts heal faster.
Before going to sleep, make sure that your body is clean. Your
clothes should be clean and comfortable, too.
A child your age needs about 10 to 12 hours of sleep. If
you do not get enough sleep, you will feel tired and restless.
You will also find it hard to think clearly. There are times that
you can get sick because you lack sleep. People who do not
get enough sleep may suffer from dizziness, headache, and
muscle pains.
Have you experienced sleeping for a few minutes? It is
called a nap. A nap is a short sleep. It is also a good form of
rest.

0 Science Works! 1

Another thing that you need is exercise. It helps develop
your muscles and bones. When your muscles and bones are
strong, you can perform well in your activities. As a result,
you can do better in school. You will also have extra energy to
do other things. How do you exercise?
You also need recreation. It is a form of play or
amusement. Recreation is important to keep you alert, active,
and creative. When you join a recreational activity, you can
meet new friends. You also develop your talents and skills
like singing, dancing, drawing, or playing instruments. What
recreational activity do you enjoy?

My Body on the Move
Objective: Identify the benefits of recreational activities.
Materials: picture of yourself doing your favorite activity,
glue, colored pencils
Procedure:
1. Bring a picture of yourself doing your favorite
recreational activity.
2. Paste it in the box on the next page. You may use a
separate sheet of clean paper if your pictures does
not fit in the box.
3. Write why you chose this kind of recreational
activity.
4. Share your work with your seatmate.


_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________

Physical Education

Biking is a good form of exercise. It keeps the body healthy
in many ways. It improves your muscles and bones. Biking also
makes your heart muscles strong. Make sure to wear safety gear
such as a helmet, and knee and elbow pads when you go biking
with your family or friends.

• Exercise keeps your muscles and bones strong.
• Aside from exercise, your body also needs rest, sleep, and
recreation.
• When you rest, you give your body a chance to relax and
regain lost energy.
• During sleep, your body grows. Wounds and cuts also
heal faster.
Science Works! 1

Encircle the letter of the correct answer.
1. How many hours of sleep does a child need?
a. 3 to 5
b. 5 to 7
c. 10 to 12
2. Why do children need to have enough hours of sleep?
a. Sleep helps them make new friends.
b. Sleep heals cuts and wounds faster.
c. Sleep develops their talents and skills.
3. Why do children need to join recreational activities?
a. to keep them alert, active, and creative
b. to keep them from sleeping
c. to keep them busy all day
4. What will happen if children do not get enough sleep?
a. They will be active and alert.
b. They will get sick.
c. They will grow healthy and strong.
5. Which group of activities exercises the body?
a. biking, jogging, watching TV
b. eating, reading, sleeping
c. biking, jogging, walking


Lesson 9 Love and Care for a Healthy You

What do you know about the following words? Draw your
answers in each box.

e
L ov

e
C ar

questions:
1. Why do children need love, care, and attention?
2. How do you show your love and care for your family,
relatives, and friends?
Science Works! 1

Sunday is family day. Carla, Nilo, and Alice are very
excited to spend the whole day with their families. The three
children live with their own parents. They also have brothers
and sisters. Their parents love them. Their brothers and
sisters love them, too.
Ben’s grandparents take care of him. His father and
mother work abroad. Ben’s grandparents are his guardians.
They love Ben.
All their parents and guardians make sure that Carla,
Nilo, Alice, and Ben’s basic needs are met. They provide
them food, shelter, and clothing.
The children’s families also spend quality time with
them. They help them with their homework and projects.
Nilo’s older brother goes with him in the park to fly kites.
Carla’s mother joins her when she reads books. Alice’s father
goes biking with her. Ben’s grandfather helps him in taking
care of the plants in their yard. Aside from their parents,
brothers and sisters, they also have cousins, aunts, uncles, and
other relatives who give them love and care.
Like these four children, a growing child like you needs
love and care from your family. Aside from your family, you
also have friends and classmates who love and care for you.
At school, you also have your teachers who look after your
needs.
You must show love and respect to your family, too. You
can show these by obeying them, helping them with the
household chores in your own little way, and taking care of
the things they give you.


Showing My Love
Objective: Draw pictures that show ways of loving and
caring for other people.
Materials: pencil, crayons
Procedure:
In each box below, draw pictures that show ways of
loving and caring for the following persons. Color each
picture.
s Brothe
Parent or Siste
r
r

Teacher

Civics and Culture

Every child has basic rights that must be met. Some of these
are the right to education, the right to play, the right to rest, the
right to a name, and the right to be protected from any harm.
These rights are recognized and put into effect through laws by
leaders of different countries all over the world.
Source: http://www.unicef.org/crc/ (accessed on 17 May 2011)

Science Works! 1

• A growing child needs love and care.
• It is important to show love and respect to the people
around you.

Encircle the pictures that show love and care.


A. Cross out () the word that does not belong to the group.
1. abdomen eyes hair nose
2. wrist leg knee chest
3. waist shoulder elbow abdomen
4. nose feet eyes ears
5. chin forehead neck lip
B. Analogy describes how two things are alike. Fill in the
blanks to show likeness between things.
1. Comb is to hair as nail cutter is to ___________________.
2. Hair is to shampoo as hand is to ___________________.
3. Thin clothes are to a sunny day as thick clothes are to
___________________.
4. Hat is to head as shoes are to ___________________.
5. Carrot is to glow food as rice is to ___________________.
C. Encircle the letter of the correct answer.
1. Which of the following is an energy-giving food?
a. bread b. fruit c. meat
2. In which part of the house do you sleep and rest?
a. bathroom b. bedroom c. dining room
3. Why do you need to exercise?
a. It makes you creative.
b. It makes wounds and cuts heal faster.
c. It makes muscles and bones grow strong.
4. Which of the following is an example of a grow food?
a. cake b. fish c. cereal
5. How many glasses of water should you drink each day?
a. 2 to 4 b. 4 to 6 c. 6 to 8
Science Works! 1

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