First Science Quiz ( Lesson 1 Review)

Remember that forces help us examine how things move.

Choose which of these are examples of ways a force affects and motion of an object.

• You drop a basketball and it falls to the ground.

• You roll a toy car down a hill and it moves faster and faster.

• Your pencil sitting on your desk.

• Your building shakes during an eqrthquake.

• Wind from a typhoon knocking down a tree.

Remember the experiment with the ping pong ball and golf ball.

Remember that both balls fell at the same rate of speed.

Remember that both balls hit the floor at the same time.

So, what force affects how objects fall?

• how heavy an object is

• gravity

• how hard you drop the object

Which of these is a change in an object's position?

Example: a tennis ball moves from Mr. Michael's desk and stops at Ms. Twinnie's desk.

• motion

• inertia

• velocity

Which of these is how fast an object changes over time?

Example: In one hour, you walk four miles in an hour. Your ___ is 4 mph (miles per hour).

• speed

• inertia

• acceleration

Which of these is the speed and direction of an object?

Example: A car drives north at 60 mph (miles per hour) for two hours. In two hours, it has traveled 120 miles.

• velocity

• motion

• force

Which of these describes when an object speeds up, slows down, or changes direction? (This is a change in velocity over time.)

• friction

• force

• acceleration

Which of these is any push or pull that can cause an object to start moving, speed up, slow down, or stop.

(Hint: We did an experiment with this using the ping pong ball and a golf ball.)

• force

• inertia

• velocity

Which of these describes when an object in motion tends to stay in motion or an object in rest tends to stay at rest?

Example: A piece of paper won't move unless something pushes it.

• inertia

• friction

• velocity

Which of these is a force between surfaces that slows objects or stops them from moving?

Example: A ball rolls to a stop on the grass.

• friction

• velocity

• speed