Useful and harmful materials

If the label has the words "harmful if inhaled" it can harm you if...

• you breathe it in

• you get it on your skin

• you eat it

• you drink it

When is a material considered useful?

• when it is hazardous

• when it destroys the environment

• when it can be reused

• when it brings harm

Which of the following materials are considered harmful?

• candy wrappers

• broken glass

• drained batteries

• food cartoons

when a material brings hazard, toxic and harms the environment. it is considered _________.

• useful

• harmful

• useless

• harmless

Some products are flammable and volatile liquid; these can harm your stomach and other system of your body when swallowed accidentally.

• True

• False

the following things are classified as nonbiodegradable except _______.

• plastics

• plants

• tires

• styro

Among the 4 options, which is considered useful?

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• 
• 
• 

When is a material harmful?

• when material can be used many times

• when the material can be used in cooking

• when the material gives other uses aside from its purpose

• when the material brings danger to people and environment

Which picture is an example of a harmful material?

• 
• 
• 
• 

If a material have the properties such as durability, flexibility, elasticity, hardness, and resistance to heat or acid, then this material is considered as _____________.

• Harmful

• Useful