a What materials comain a substance that cannot be broken down or decayed?
A non biodegradable B. biodegradable c paper
D. chemical
4. What gas is used by animals and plants in their respiration (breathing) process?
B. carbon
C nitrogen
D helium
5. What is a form of energy that can be transferred from one obyect to another?
A heat
B. thermometer C. barometer D. temperature
A oxygen






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