Science Chapter 6 and 7

What tool can be used to measure time?

• use stopwatch

• use ruler

• use mirror

What tool can Joko, Dian, and Sri use to measure distance?

• use the ruler

• use the compass

• use the hand

What force is created when one surface moves against another surface?

• Gravity

• Friction

• push

Earth attracts all objects towards it. This force is called ...

• Gravity

• Friction

• Magnet

When a rough surface moves against a smooth surface, it creates ... friction.

• more

• less

• same

When a rough surface moves against a rough surface, it creates ... friction.

• more

• less

• same

What is the force that pulls all objects towards the centre of the Earth?

• Friction

• Magnet

• Gravity

When a smooth surface moves against another surface, it creates ... friction.

• more

• same

• less

What force is generated when one surface moves against another surface?

• Gravity

• push

• Friction

in what order did the balls hit the ground?