model 3 grade4 February exams on concept 1 and 2

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1. During riding a bike, some kinetic energy is converted into …… energy due to friction of bike’s tire with the road.

3 points

chemical

potential

thermal

electrical

Clear selection

2. A plugged-in lamp can turn……………energy to…………energy.

3 points

electrical, light

kinetic, light

chemical, light

chemical, heat

Clear selection

3. Coal is formed under the Earth’s surface from the remains of.......

3 points

dead animals.

dead plants.

dead humans

dead insects.

Clear selection

4. The idea of design and work of the robot that explores the surface of Mars depends on the idea of transforming ……..energy to ………….energy

3 points

electric to kinetic

potential to kinetic

light to electric

kinetic to electric

Clear selection

5. Extreme heat and pressure under the Earth’s surface has an important role in forming……..

3 points

wood

grass

fossil fuel

corn

Clear selection

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