What do you call the process of separating wastes?

These are wastes that can easily decompose in the soil?

Vincent turned their old magazines into a pen holder. Which of the following did he practice?

If the label has the words "harmful if inhaled" it can harm you if...

When is a material considered useful?

Which of the following materials are considered harmful?

when a material brings hazard, toxic and harms the environment. it is considered _________.

Some products are flammable and volatile liquid; these can harm your stomach and other system of your body when swallowed accidentally.

The following things are classified as nonbiodegradable except _______.

Another term for burning is

Which metals rusts?

A rusting bicycle

burning wood is ........... change

What change will happen to the slices of potato if they will be exposed to oxygen in the air?

What causes the rusting of iron nails or iron made materials in a wet cloth?

Joram noticed that when he mopped the floor using wet rugs, the moist in the floor disappeared after few minutes. What is the reason why the floor became dry?