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The intensity of heat in a substance or object, as shown by a comparative scale (e.g. degrees Celsius) on a thermometer, or felt by touch.

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The flow of energy from a warm object to a cooler object. It is also described as energy in transit (carried from one place to another).

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An instrument for measuring and indicating temperature, usually made up of a narrow glass tube containing mercury or alcohol which expands up the tube as it heats up. The tube is usually marked with lines to measure degrees Celsius.

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A scale of measuring temperature.

Water freezes at 0 degrees Celsius

Water boils at 100 degrees Celsius

FUN FACT: Some other countries, such as the United States and some Pacific Islands, use a different temperature measurement system called Fahrenheit.

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Heat is a form of energy. Heat flows from hot objects to cool objects. When objects are the same temperature, they have the same amount of heat energy.

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Natural sources of heat energy are found in:

The earth

lava

hot springs

The sun

Plants

Animals

Thunderstorms and Lightning Storms

Fossil Fuels

coal

gas

oil

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Artificial sources of heat energy include:

Machinery

Lights

Heaters & Air Conditioners

Appliances