2nd Nine Weeks Review

Use the diagram below to answer the question. A 10-kilogram (kg) box is placed on a ramp at point L. The ramp has been covered with oil to reduce friction. The box begins to move once placed on the ramp. In ten trials the box comes to a stop between points F and E. What is most likely to happen if the box is placed at point G instead of point L?

• The box will move at a faster speed.

• The box will come to rest before Point F.

• The box will continue to move past Point E.

• The box will not move at all.

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Examine the image below from NASA. Which of the following is a true statement?

• The gravitational force on the surface of Mars changes a person's mass.

• The weight of a person on Earth is less than if they were standing on Mars.

• The surface gravity on Earth is approximately 38% of the surface gravity on Mars.

• A person whose mass is 70 kg on Earth would have the same mass on Mars.

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NGSS.MS-PS2-4

Jerry threw a ball into the air. It followed a curved path and soon fell to the ground because ______.

• air friction stopped the ball

• gravity changed the ball's direction

• the ball was not thrown hard enough

• the ball was not thrown straight up

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NGSS.MS-PS2-4

Examine the diagram below. The diagram shows a ball suspended on a steep ramp. Once the ball is released, which of the following statements is correct?

• The ball will have its greatest kinetic energy in Position A.

• After crossing Position D, the ball will slowly gain kinetic energy.

• The potential energy at Position B is 50% greater than that of Position A, but less than Position C.

• The kinetic energy of the ball at Position C is greater than either Position A or B.

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Noah carried a skateboard up a hill and then rode the skateboard down the hill. When Noah reached the bottom of the hill, he rolled to a stop. When did Noah have the most potential energy?

• While carrying the skateboard up the hill

• While standing on the skateboard at the top of the hill

• While riding the skateboard down the hill

• While standing on the skateboard at the bottom of the hill

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NGSS.MS-PS3-2

A student sets a block at the top of a wooden ramp. The student pushes the block. As the block slides down the ramp, it slows down and then comes to a stop. What force causes the block to slow down?

• the force of gravity

• the force of friction

• the force of magnetism

• the force of the student's push

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NGSS.MS-PS2-2

A force acting on an object that is free to move will cause a change in the speed of the object. Which graph shows how the speed of an object would change if a single constant force were applied to the object over a period of time?

• Graph A

• Graph B

• Graph C

• Graph D

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NGSS.MS-PS2-1

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Five students are running a lemonade stand in their neighborhood. They combine 3 liters of water with 4 packets of lemon flavoring. However, the students felt the taste was too sour and that people would not like the taste of it. What action should the students take to decrease the concentration of lemon flavoring in the solution?

• increase the amount of solute

• stir the solution vigorously

• increase the amount of solvent

• add more lemon flavoring

The picture below shows four parts of a wooden pencil. Which part of the pencil is the best conductor of electricity?

• metal band

• plastic grip

• rubber eraser

• wood body

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NGSS.MS-PS2-3

The star cluster shown above is that of the “Seven Sisters.” Why do these stars appear dimmer than the Sun (which is also a star)?

• Because the stars of the “Seven Sisters” are less dense than the Sun.

• Because the Sun gives off light, which can be seen from Earth without a telescope.

• Because stars within the cluster known as the “Seven Sisters” do not create light in the same way as the Sun (i.e., producing light by a nuclear reaction called fusion).

• Because the “Seven Sisters” are located more than 400 million light years from Earth.

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