The document provides instructions for an activity where students will make a poster about common elements that are essential to human life, including the element name, symbol, food sources, functions in the body, and potential deficiency conditions. It includes a table listing several important macrominerals and microminerals, their sources, roles, and what may happen if deficient. Students are asked to identify elements in foods they eat and complete tasks to strengthen their understanding of elements.

1. Republic of the Philippines
Department of Education
REPUBLIC COLLEGES OF GUINOBATAN, INC.
G. Alban Street, Iraya, Guinobatan, Albay
E-mail Address: republiccolleges@yahoo.com
CP No.:0946-419-3153
Science 7
Quarter 1 – Module 4
Poster of Common Elements with Names,
Symbols and Uses
Name:

2. 1
The food that we eat contains many elements which
are mostly nutrients needed by the human to function
well. Examples of these elements are calcium,
magnesium, zinc and iron. These elements in food are
combined with other elements and the resulting
compounds are referred to as minerals.
Getting to know the elements essential to our
body is important. Do you want to know these elements?
Read on and perform the activities prepared for you in
this module.
At the end of the module, you should be able to:
Supplementary Learning Module for Junior High School Learners
LESSON
Poster of Common Elements with Names, Symbols and Uses
1. Make a poster of the common elements with
their names, symbols and uses; and
2. Recognize some elements essential to the
human body.
What’s in a word? (Part I)
Directions: List five words starting from letter A to E that
make use of the symbols of the different elements in the
periodic table. Be creative.
Word/s
Example: AcCePt
1.
2.
3.
4.
5.

3. 2
What’s in a word? (Part II)
Directions: Identify the names of the elements represented by the symbols that you have
used to form the word.
Word/s Element Names
Example: AcCePt Actinium, Cerium, Platinum
1.
2.
3.
4.
5.
Guide Questions:
1. Among the elements that you have identified from each symbol, which do you think is found
in your body?
2. What do you think are the uses of these elements?
Good job in finishing the activity! Now, take time to
process the information you acquired by accomplishing the
next task.
POSTER PROMOTION
Directions: Using your drawing and coloring materials make a poster of an element based on
Table 2. “Some elements essential to life.” The element poster may include the following
information: name of the element, element symbol, its food sources, functions in the human
body and deficiency condition it may cause.
Hi! How did you find the activity?
Please check your answers and see how well you did.
Don’t worry if you got a low score, this just means that
there are more things that you can learn from this
module. So, hop on!

4. 3
ELEMENT POSTER ACTIVITY
Food Sources
Element Name and Symbol
Functions in the Human Body Deficiency Condition

5. 4
There are mineral nutrients needed by the body. They are not manufactured by the
body although found in body tissues and fluids. They come from the food we eat. Some
nutrients, their sources, their role in the human body and deficiency condition they may
cause are shown in Table 2.
Table 2. Some elements essential to life
Element Source Function Deficiency condition
Macrominerals
Calcium
(Ca)
Milk, cheese, canned fish
with bones, sesame seeds,
green leafy vegetables
Essential to
formation and
maintenance of
bones and
teeth;
regulates
nerve
transmission,
muscle
contraction,
and blood
clotting
Rickets in children;
diseases of the bones in
adults such as softening of
the bones and decrease in
bone mass
Magnesium
(Mg)
Nuts, legumes, cereal
grains, dark green
vegetables, sea food,
chocolate
Catalyst in the
synthesis of
energy-carrier
molecules;
involved in the
synthesis of
proteins and
relaxation of
muscles
Fluid loss due to too much
alcohol intake;
heart failure due to
spasms
Potassium
(K)
Orange juice, bananas,
dried fruits, potatoes
Maintains
regular
heartbeat,
water balance
and cell
integrity;
needed in
nerve
Sudden death during
fasting, poor nerve
function, irregular heart
beat

6. 5
transmission,
carbohydrate
and protein
metabolism
Selenium
(Se)
Liver, meat, grain,
vegetables
Part of
enzymes;
antioxidant
Keshan disease (heart
disease)
Sodium
(Na)
Meat, table salt, salt-
processed food
Regulates
amount of body
fluid; involved
in nerve
transmission
Headache, physical
weakness, thirst, poor
memory, appetite loss
Sulfur (S)
Some proteins Component of
biomolecules
and ions
Zinc (Zn)
Liver, shellfish, meat,
wheat germs, legumes
Part of insulin
and some 154
enzymes
Anemia, stunted growth

7. 6
Microminerals or Trace elements
Chromium
(Cr)
Liver; animal and plant
tissues
Needed for
glucose
utilization
Loss of insulin efficiency
with age
Copper
(Cu)
Liver, kidney, egg yolk,
whole grains
Helps in the
formation of
hemoglobin;
part of 11
enzymes
Rare
Fluorine (F)
Sea food, fluorinated
drinking water
Strengthens
bone and tooth
structure
Dental decay
Iron (Fe)
Liver, meat, green leafy
vegetables, whole grains,
cocoa beans
Component of
hemoglobin
and myoglobin
Anemia, tiredness, and
apathy
Iodine (I)
Sea food, iodized salts Part of thyroxin,
regulates rate
of energy use
Goiter

8. 7
Manganese
(Mn)
Liver, kidney, wheat germ,
legumes, nuts
Cofactor for a
number of
enzymes
Weight loss, occasional
dermatitis
*Source: Chemistry S&T Textbook for Third Year, 2009

9. 8
MY FOOD PLATE
Directions: Fill up the food plate of your last meal. It can either be breakfast, lunch or dinner.
Guide Question:
What are the elements present in the food that you have listed?
Refer to Table 2. Some elements essential to life.
Example: Banana – Potassium (K)
Dairy
Fruits
Grains
Vegetables Protein

10. 9
To strengthen what you have learned in this module, perform the following additional tasks.
Doing a detective work
1. Look and list five items or products at home that are made of elements.
2. What are the properties of each element and what are they made of that might affect their
uses?
Item/Product Elements it is
made of
Properties of each
element
Uses
1.
2.
3.
4.
5.

11. 10
The following terms used in this module are defined as
follows:
Elements – are chemically the simplest substance and hence cannot be broken down using
chemical reactions.
Minerals – the resulting compounds when elements in food are in combination with other
elements.
Periodic Table of Elements – the organized array of all the chemical elements in order of
increasing atomic number.
Symbol – (chemical symbol) a short notation derived from the name of a chemical element.
Making A Poster: Poster rubric
Student Name Grade and Section:
CATEGORY Excellent
4
Very
Satisfactory
3
Satisfactory
2
Poor
1
SCORE
Required The poster All required All but 1 of the Several required
Elements includes all elements are required elements elements were
required elements included on the are included on the missing.
as well as poster. poster.
additional
information.
Labels All items of Almost all items of Many items of Labels are too
importance on the importance on the importance on the small to view OR
poster are clearly poster are clearly poster are clearly no important items
labeled with labels labeled with labels labeled with labels were labeled.
that can be read that can be read that can be read
from at least 3 from at least 3 feet from at least 3 feet
feet away. away. away.
Graphics - All graphics are All graphics are All graphics relate Graphics do not
Relevance related to the related to the topic to the topic. One or relate to the topic
topic and make it and most make it two borrowed OR several
easier to easier to graphics have a borrowed graphics
understand. All understand. Some source citation. do not have a
borrowed borrowed graphics source citation.
graphics have a have a source
source citation. citation.

12. 11
Attractive-
ness
The poster is
exceptionally
attractive in terms
of design, layout,
and neatness.
The poster is
attractive in terms
of design, layout,
and neatness.
The poster is
acceptably
attractive though it
may be a bit
messy.
The poster is
distractingly messy
or very poorly
designed. It is not
attractive.
Grammar There are no
grammatical/mech
anical mistakes on
the poster.
There are 1-2
grammatical/mech
anical mistakes on
the poster.
There are 3-4
grammatical/mech
anical mistakes on
the poster.
There are more
than 4
grammatical/mech
anical mistakes on
the poster
TOTAL SCORE
/20
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