The document outlines the characteristics of useful and harmful materials in the context of materials science, emphasizing the importance of understanding material properties for waste segregation. It includes practical activities for identifying and categorizing items based on their usefulness and harmfulness, along with guidelines for handling hazardous materials. The aim is to educate individuals about reducing waste and ensuring safe disposal practices.

1. Useful and
Harmful
Materials
Science 5

2. Learning Objectives
1.Identify then different
characteristics of materials that’s
make it useful and harmful.
2.Learn how to segregate waste
based on its properties.

3. 02
What is Matter?
Everything
around us is
matter
01 03
04
Matter has
different propeties
that makes them
different from one
another.
Some types of matter have
properties that makes them
good materials for
producing useful products.
Other types have properties
that makes them harmful.
Sometimes, matter
also undergoes
changes that affect
their properties

4. Direction: Get three items inside your bag and
three more items inside the classroom. Identify
each item that you found and answer the
following questions.
1. What is the item made of?
2. Are these materials safe or harmful? Why?
Explore

5. Explore
We use different materials for cleaning, cooking, eating and
repairing. The usefulness of a certain material depends on its
properties. These are materials that are durable and therefore can be
reused many times. Though there are some that are not meant to be
used. Creative and inventive people still find a ways to use them.
There are also materials are made of ertain purposes only and
can be harmful when not use properly.
In order to minimize waste in our own household , we have to
know which materials are still useful and which are ones should
already disposed.

6. Direction : in the chart below, list down five materials that you find
inside the classroom. Write down each materials usefulness and
harmfulness in the proper column in the table.
Activity 1
Material Usefulness Harmfulness
1.
2.
3.
4.
5.

7. Look at the pictures below

8. Activity 2 Direction: What kind of materials are
used at home? List your answers in
the table below.
What materials are made of: Names of household materials
1.
2.
3.
4.
5.

9. When is a
material
useful?

10. Material is Useful if it can be
beneficial to humans or the
environment.
For Example: A water is very
useful material can be used to
mix different substances.

12. A material is harmful if there is
more than good that can be
obtain from it.
For Example: batteries can
provide energy to different
kinds of equipment but the
contents of battery is
harmful.

13.  They must have separate conatiner for
disposal.
 They must have proper labels and should
be out of reach of children.
 They must not be touched with bare
hands. Gloves should be used when
possible.
Guidelines in Handling, storing,
disposing Harmful Materials.:

14. Corrosive material chemicals must
not be flushed down the sink or
toilet
Flammable material such as thinner
and firecrackers must be stored in
cool and dry place far from any flame
source.

15. Always read and follow the
instructions of a product
before using it.

16. 1. ______cotton
2. ______pesticides
3. ______ socks
4. ______blanket
5. ______muriatic acid
6. ______empty paint can
7. ______drained batteries
8. ______old news papers
9. ______use paint brush
10.______vegetable scrap
Identify the material if its useful or
harmful

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