2. What do you think will happen if you put leftover foods in a cool place like the refrigerator?

3. You found leftover food on the table with molds and bubbles in it. It was already spoiled. Why do you think the food got spoiled?

4. Your father is making a compost pit in your backyard. What kind of waste materials are you going to put in it? (Give at least 5 examples.)

5. Your mother made two trashcans, labeled it decaying and non-decaying, and asked everyone to use them properly. What will you do to follow your mother's instructions?​