Page 46 - Science Class 6 Times Publication

Combustion of food

Our body is warm. This is due to the heat produced from food inside
our body. The food reacts with oxygen inside mitochondria of cell,
and heat energy is produced. This heat keeps our body warm.

Effects of heat
Heat has following effects.
i. Heat causes rise in temperature of a body.

ii. Heat causes expansion of an object.
iii. Heat causes change in state of matter.
Heat causes rise in temperature of a body

When you heat an object, it becomes hotter. Becoming hotter means
rise in temperature.

Activity 4.3
To show that heat rises the temperature of a substance

Materials required: A beaker, stand, thermometer

Procedure

1. Take some water in a beaker.

2. Dip the bulb of thermometer inside the water to measure
temperature of the water.
3. Note the temperature.
4. Heat the water for two minutes. Now, observe the temperature.
What is your result? What conclusion do you get from the
activity?

Times' Crucial Science and Environment 42 Book 6