The following are Non biodegradable except one.

Ann take medicine more than the prescribed dosage of her doctor to speed her recovery.

Mother uses the refrigerator to preserve the food.

Marga cleans the dishes with bathroom cleaner.

Alexandra used old clothes to make a broom

Mr. Dela Cruz uses steel and cement to build his house.

Which materials became harmful when not properly used?

Which of the following are useful materials?

Why is steel very useful in building construction?

Which of the following should be done to make rotten vegetables and fruit scraps became useful?

I. burn them

II. throw them away anywhere

III. put them in a compost pit to become fertilizer

IV. collect and process them for animals feeds

Which group belongs to cleaning materials?

Some household products are results from mixture between two or more substances. Which product can be classified as medicine?