1. Heat
Heat is a form of energy that transfers from one body to another due to a difference in temperature. 

Heat always flows from a hot object to a cold object.

It is a form of energy.

The SI unit of heat is Joule (J).

It is measured using a calorimeter.

Example:
If you put a hot spoon in cold water, heat flows from the spoon to the water.

2. Temperature
Temperature is the measure of how hot or cold an object is. 
It tells us the average kinetic energy of particles in a substance.

It indicates the degree of hotness or coldness.

The SI unit of temperature is Kelvin (K).

It is measured using a thermometer.

Common scales:

Celsius (°C)

Fahrenheit (°F)

Kelvin (K)