ns5 unit 4 - energy

natural science 5

Energy

What’s energy?

Energy is the ability of an object to move, heat up or produce light.

What’s mechanical energy?

Energy that produces movement is called mechanical energy. There are two types of mechanical energy: kinetic energy and potential energy.

kinetic energy potential energy

How do the other five forms of energy differ?

Chemical energy is stored in some substances.

Electrical energy is in the form of electricity.

Thermal energy is in the form of heat.

Light energy is in the form of light.

Nuclear energy is stored in the atomic structure of all matter.

What are some common energy transformations?

Aeroplanes and cars transform the chemical energy in fuel and petrol into kinetic and thermal energy.

Fans and electric drills transform electrical energy into kinetic and thermal energy.

Solar panels transform light energy from the Sun into electrical energy during the day.

How do we measure calories in food?

The chemical energy stored in food and drink is measured in calories. The more calories in a food, the more energy it contains.

What are the different types of renewable energies?

Renewable sources include: hydroelectric power, wind energy, solar energy and biofuels.

What are the different types of non-renewable energies?

Non-renewable energy is energy from sources that are limited. They are: petroleum, coal, uranium and natural gas.

How can we protect our planet?

Reduce: buy products that don’t have a lot of packaging.

Reuse: use glass, metal and plastic containers again and again.

Recycle: separate rubbish and put it in the correct bin.

What have we learnt?

chemical electrical thermal light

The main forms of energy are…

mechanical nuclear

What have we learnt?

solar energy biofuels hydroelectrical

energy

Renewable energy sources include...

wind energy

What have we learnt?

natural gas coal uranium

Non-renewable energy sources include...

petroleum