Question

F. Long Answer Questions:
1. Explain how change in the states of matter takes place.
2. Explain how a metal rim is fixed around the wooden wheel of a cart.​

Answer 1

Explanation:

1.= Matter changes state when energy is added or taken away. ... When matter is heated enough, the molecules move faster and with greater energy. If enough heat is added, a solid can become liquid and a liquid can become gas. In the same way, molecules slow down when they are cooled.

2.= For fixing the metal rim on a wooden wheel of a cart. The metal rim is made slightly smaller than the wooden wheel. On heating, the rim expands and fits onto the wheel. Cold water is then poured over the rim, which contracts and fits tightly onto the wheel.

Answer 2

Explanation:

Answer:

• Matter changes state when energy is added or taken away. ... When matter is heated enough, the molecules move faster and with greater energy. If enough heat is added, a solid can become liquid and a liquid can become gas. In the same way, molecules slow down when they are cooled.

• The metal rim is made slightly smaller than the wooden wheel. On heating, the rim expands and fits onto the wheel. Cold water is then poured over the rim, which contracts and fits tightly onto the wheel.