grade 4 , con 5 , lesson 1

When a sand surfer moves down the hill, this means that he has ........... due to his movement.

• kinetic energy

• light energy

• potential energy

• stored electrical energy

Human needs .......... to walk from one place to another.

• light energy

• energy obtained from food

• sound energy

• energy obtained from batteries

Electric motor in the roller coaster helps it to .......

• move up to the top of the hill.

• move down to the bottom of the hill.

• stop at the top of the hill.

• stop at the bottom of the hill.

When an object moves down a ramp, its stored potential energy........

• increases.

• doesn't change.

• changes to a less active form of energy.

• changes to a more active form of energy.

When the roller coaster goes up, its speed...........

• decreases as it goes down.

• decreases as it reaches the top of the hill.

• is more than its speed when it goes down.

• increases as it reaches the top of the hill.

When a wheelchair and a car go up a ramp, which of them can store some energy?.........

• The wheelchair only.

• The car only.

• Both of them.

• None of them.

The roller coaster has the most energy of motion, ..........

• as it goes up to the top of the hill.

• as it goes down the hill.

• when it stops at the top of the hill.

• when it stops at the bottom of the hill.

When the roller coaster stops, its energy of motion...............

• doesn't change.

• increases.

• decreases.

• becomes zero

When a car moves up a ramp, this happens due to the effect of ...........

• gravity force.

• balanced force.

• kinetic energy.

• sound energy.

The type of energy that allows objects to move is known as................

• light energy.

• potential energy.

• solar energy.

• kinetic energy.