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10 questions
Anything that occupies space and has mass
sound
matter
light
energy
When is a material useful?
When the material serves a purpose.
When the material brings hazards.
When the material brings harm.
When the material is toxic.
Among the 4 options, which is considered a useful material?
When is a material harmful?
When the material can be used many times.
When the material gives other uses aside from its purpose.
When the material can be used in cooking.
When the material brings danger to people and environment.
Which picture is an example of a harmful material?
When is a material considered waste?
When the material is still another use.
When the material served its primary use and can be discarded.
When the material can be repaired.
When the material can be recovered and be used a fuel.
Which of the following is a biodegradable waste?
What happens to biodegradable waste when they are thrown?
Melts by the sun
Broken into pieces
Decomposed by bacteria
Flattened
Which of the following is a non-biodegradable waste?
paper
leaves
rubber
wood
Where do we place our garbage properly?
in the river
in the mountains
in the landfills
in the lakes
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