Continue of heat physics 7 grade

The amount of thermal / heat energy (Q)

The amount of heat / thermal energy is influenced by:

Mass

The bigger mass  the bigger thermal energy.

Type of object

The difference object the difference thermal energy.

 

Temperature change

The higher temperature the higher thermal energy.

to be continue ...........................

When you heat a substance, you are transferring energy into it by placing it in contact with surroundings that have a higher temperature

Example:

When you place a pan of cold water on a stove burner - the burner is at a higher temperature than the water, and so the water gains energy. 

What is HEAT?

Heat is defined as form of energy which’s transferred across the boundary of a system due to a temperature difference between the system and its surroundings.

Heat can change the state of substances 

When

heated

Unit of  HEAT

Heat is measured in Joule (J) or calorie (cal).

1 Joule  = 0.24 calorie   1 calorie = 4.2 Joule. 

If an object has become hotter,
it means that it has gained heat energy.

If an object cools down, it means it has
lost energy