Understanding Gravity and Motion

Which movement in the playground is caused by the presence of gravity?

• Two groups play tug-of-war.

• Young boys slide from the top to the ground.

• Small boys enjoy their ride in the merry-go-round.

• The children run back and forth on the clear pavement.

Why does a car travel faster going down than going up?

• It is moving toward gravity.

• It is moving against gravity.

• It is being pushed by the wind.

• It is being pulled by the weight of the car.

What effect does friction have on the motion of a moving object?

• It speeds up the object

• It slows down the object

• It doesn't affect the object's motion

• It makes the object float

Which of the following statements best describes friction?

• It is a force that occurs in two solids.

• It is a force that occurs only on rough surfaces.

• It is a force that occurs between solids and liquids.

• It is a force that occurs when surfaces touch each other.

It is the organ that we use to hear sounds.

• Eyes

• mouth

• voice box

• ears

What is the unit used to measure the loudness of sound?

• Watts

• Decibels

• Hertz

• Newtons

What is heat energy?

• Light energy

• Mechanical energy

• Thermal energy

• Electrical energy

A steam engine transforms _______________.

• heat energy into sound energy

• electrical energy into sound energy

• heat energy into mechanical energy

• mechanical energy into heat energy

How does solar panel work?

• It converts sun’s heat into electricity.

• It converts sun’s light into electricity.

• It converts fossil fuel into electricity.

• It converts light to chemical energy.

What is energy transformation?

• It is bending energy to form another energy.

• It is changing one energy into another energy.

• It is when two or more energies exchange into one another.

• None of the above