8th Grade Term 1 Test Review

Label the steps of the scientific method in order.

a

b

c

d

e

f

Research

Data Analysis

Conclusion

Hypothesis

Purpose

Experiment

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Label the image by adding the appropriate explanation of each step.

c

d

e

f

b

a

Develop a procedure to test hypothesis.

Find more info about topic.

Predict the answer to the problem.

Gather, organize, evaluate data

What is the problem?

Was your hypothesis correct?

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A golf club hits a golf ball with a force of 200 Newons. What is the force and its direction exerted by the golf ball on the golf club?

• 100 Newtons, opposite direction

• 100 Newtons, same direction

• 200 Newtons, opposite direction

• 200 Newtons, same direction

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According to Newton's Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because --

• the mass of the skateboard is the same as the mass of the person jumping off.

• for the force that sent the person forward, there is an equal force pushing back on the skateboard.

• the pull of gravity on the person is the same as on the skateboard, regardless of size.

• the air resistance on the person is great and the fricion on the skateboard is small.

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The nozzle of a rocket is pointed downward so that as fuel is ignited, the exhaust pushes downward. Why is this arrangement necessary for a rocket to function properly?

• The rocket is protected from the heat of the exhaust.

• Burned fuel can be collected on the ground.

• This allows the rocket to be steered properly.

• As fuel is combusted, the rocket pushes the gases backward and the gases push the rocket forward.

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NGSS.MS-PS2-1

Newton's third law describes action and reaction forces. A table of four scenarios is provided. Which of the scenarios described in the table show equal and opposite reaction forces?

• the rocket and the train

• the rocket and the balloon

• the balloon and girl

• the train and girl

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NGSS.MS-PS2-1

The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?

• The force of the nail pushing in the opposite direction

• The force of the air resistance on the moving hammer

• The force of the person using the hammer

• The force of gravity pulling down on the hammer

Match the following

• Reaction

• A change in position of an object relating to time

• Motion

• For every action, there is an equal and opposite reaction

• Collide

• To strike or hit something with great force

• Newton's third law

• This is always equal and opposite to the action force

• Force

• A push or a pull that changes an object's motion

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NGSS.MS-PS2-1

The illustration shows the forces in Newtons (N) acting on three different blocks. Which blocks will experience a change in motion, or acceleration?

• Blocks 1 and 2

• Blocks 1 and 3

• Blocks 1, 2, and 3

• Blocks 2 and 3

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The illustration shows all the forces in Newtons (N) acting on a box. The sum of all the forces acting on the box results in a force acting on the box--

• to the left with a strength of 7 Newtons

• to the right with a strength of 25 Newtons

• to the right with a strength of 11 Newtons

• to the left with a strength of 6 Newtons

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