MATTER

Freezing enables us to store and preserve meat.

• USEFUL

• HARMFUL

Melting of metals is used in making cans and utensils. Some toys are also molded by means of melting.

• USEFUL

• HARMFUL

An increase in the rate of evaporation may lead to drought.

• USEFUL

• HARMFUL

Digestion of Food

• CHEMICAL CHANGE

• PHYSICAL CHANGE

Melting of ice cream

• CHEMICAL CHANGE

• PHYSICAL CHANGE

Rusting of Iron

• CHEMICAL CHANGE

• PHYSICAL CHANGE

making clothes, synthetic fibers, wools and plastics.

• CHEMICAL CHANGE

• PHYSICAL CHANGE

Pollution is the introduction of harmful materials into the environment.

• TRUE

• FALSE

Burning of garbage, rubberized materials, plastics, and polystyrene is good for our environment

• TRUE

• FALSE

Conserve water and minimize the use of non recyclable materials.

• TRUE

• FALSE