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Old cells cannot be reused. True or False?
True
As you know, a lot of waste is b________. This pollutes the soil and the ground water.
buried
What could be reused?
Ss answer
What could be recycled?
Ss answer
As the plant materials __ __ __, it turns into compost.
rot
_____ - ________ use the dead plant materials as food.
Micro-organisms
Why should we make compost heap?
Ss' answer
Water is im________ to humans, plants and animals.
important
People who drink _______ (pollute / polluted / pollution ) water may get sick and die.
polluted
Rivers often begin in the mountains where the water is polluted. True or False?
False
We need ______ ______ water to drink.
clean fresh
Most of the water on Earth is salty. True or False?
True
People affect the environment in good and bad ways. True or False?
True
All of us need energy. We also make lots of _________.
waste
We often throw away our old books that could be __________ (reused / recycled)
reused
A war is a man-made disaster or a natural disaster?
a man-made disaster
The ways we use water
Student's answer


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