1. The following changes in materials are useful to environment EXCEPT one:
a. Use eco-bag when buying groceries.
b. Use both side of pad paper when writing.
c. Buy items in refillable container.
d. Ise pesticides in killing insects.

2. How should biodegradable wastes be disposed?

Need ko po nvg maayos na sagot. Advance thank you po!
a. by composting
b. by recycling
c. by reusing
d. by throwing anywhere

3. To prevent soil pollution caused by non-biodegradable wastes, one should practice _____.
a. Reuse
b. Recycle
c. Recombine
d. Both A and B

4. Which material can be used to make an alternative face mask?
a. glass
b. paper mask
c. wood
d. cloth

5. Changes in materials have great effects in the environment. Which change is useful to the environment?
a. Burning of garbage.
b. Buying disposal materials.
c. Reuse plastic container amd bottles.
d. Throwing of dead animals into the river. ​