Final Science Revision - Unit 8 - Grade 4

What is tidal energy?

• Energy from wind

• Electricity from sunlight

• Electricity from the movement of water during tides

• Heat from deep in the Earth

Which energy uses ocean waves to make electricity?

• Wind energy

• Tidal energy

• Wave energy

• Solar energy

What gas causes the atmosphere to hold more heat?

• Oxygen

• Greenhouse gas

• Hydrogen

• Helium

What is global climate change?

• The Earth spinning faster

• The Sun getting hotter

• The Earth warming quickly

• More rain in the mountains

Solar electricity is made using what special devices?

• Wind turbines

• Photovoltaic cells

• Nuclear reactors

• Fossil fuel plants

What are materials in nature used by people called?

• Fossil fuels

• Greenhouse gases

• Natural resources

• Pollutants

A resource used faster than it can be replaced is called a:

• Renewable resource

• Non-renewable resource

• Natural resource

• Clean resource

Which of these is an example of a natural resource?

• Plastic bag

• Solar energy

• Car tire

• Battery

What is the energy from inside atoms called?

• Wind energy

• Nuclear energy

• Solar energy

• Hydro energy

What are harmful emissions called?

• Natural resources

• Pollutants

• Renewable energy

• Wind currents