Review

A person rolls a ball on a flat surface that suddenly slopes downward. Which most likely describes the motion of the ball?

• The ball stops when it reaches the downward slope.

• . The ball speeds up as it travels on the downward slope.

• The ball slows down as it travels on the downward slope.

• The ball changes directions as it travels on the downward slope.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which is the best example of friction?

• applying brakes on a bicycle to slow down

• getting wind in a sail to move forward

• putting gas in a car to drive

• falling apples from a tree to the ground

Tags

NGSS.MS-PS3-5

If a person pushes against a ball and the ball moves, which is true?

• The person is applying force to the ball.

• The person is changing the mass of the ball.

• The force of gravity is less than the mass of the ball.

• The force of friction is greater than the force of gravity.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A ball is rolled across a flat surface covered by carpet. Then, with same equal force, the ball is rolled on a flat, smooth surface. Which best explains why the ball rolls slower on the surface covered by carpet than on the smooth surface?

• There is less gravity between the ball and the carpet.

• There is less friction between the ball and the carpet.

• There is more gravity between the ball and the carpet.

• There is more friction between the ball and the carpet.

List the steps of the scientific method

d

e

f

c

b

a

Draw conclusions

Ask a question

Communicate results

Conduct experiment

Form a hypothesis

Analyze results

Tags

NGSS.MS-LS1-5

Identify an example of each of the three states of matter present when the candle is burning.

• The melting wax

• Solid

• The hard wax of the candle

• Liquid

• The fire/flame

• Gas

Tags

NGSS.MS-PS1-4

Which demonstrates a force being used to increase the speed of an object?

• wind pushing the sails of a sailboat

• a farmer pulling on the reins of a horse

• a driver pressing on the brakes in a truck

• a parachute opening during a person’s jump

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

Which best describes the distance an object moves in a given amount of time?

• speed

• gravity

• momentum

• friction

Tags

NGSS.MS-PS3-1

What information is needed to determine the speed of an object?

• time and height

• distance and time

• distance and inertia

• height and distance

Tags

NGSS.MS-PS2-2

The graph shows the motion of a soccer ball over time.

What most likely happened to the soccer ball at 20 meters?

• The mass of the ball changed.

• The shape of the ball changed.

• The speed of the ball changed.

• The direction of the ball changed.

Tags

NGSS.MS-PS3-1