Grade 4 Science( Revision sheets) 2nd term 2024

Which of the following are renewable resources? Select all that apply.

• fossil fuels

• hydroelectricity

• wind energy

• copper

Energy can change from one form to another. Which can change mechanical energy into electrical energy?

• a switch

• an electromagnet

• a transformer

• a generator

Which is where geothermal energy comes from?

• inside Earth

• the Sun

• wind turbines

• hydroelectric dams

Which is an example of a nonrenewable resource?

• wind

• sunlight

• oil

• water

Fossil fuels are _____

• nonrenewable resources

• renewable resources

• unlimited resources

• Inexpensive resources.

Lilly learned that fossil fuels contain a lot of energy. Why are fossil fuels considered nonrenewable resources?

• Fossil fuels are essential to civilization.

• Fossil fuels cannot be replaced fast enough for future use.

• Fossil fuels are easily renewed.

• Fossil fuels are alternative energy sources.

Nonrenewable resources are resources that _____.

• take so long to form that they cannot be replaced quickly

• are so plentiful in nature that they can be used without worry

• cause no pollution to the environment, so they are the best kind to use

The act of saving, protecting, or using resources wisely ...is

• reservation

• generation

• conservation

Suppose you turn on a fan. Which energy conversion happens inside the electric motor?

• radiant to electrical

• heat to stored energy

• nuclear to electrical

• electrical to energy of motion

How are fossil fuels formed?

• Heat and pressure turn animal and plant remains into fuels.

• Scientists collect fossils and turn them into fuels.

• On the surface of Earth, wind and rain turn fossils into fuels.

• Fossils sink into swamps and take between five and ten years to turn into fuels.