Benchmark Review (8th grade)

What is Newtons 3rd law?

• Everything has an equal an opposite reaction

• An object in motion stays in motion

• an object in rest stays in rest

• F=ma

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What is a example of lab safety?

• Keep your hair down

• Eat a snack before an experiment

• Keep your goggles on at all times

• Play around the equipment

What is a Longitudinal Wave?

• A wave that vibrates the medium in the same direction in which the wave travels

• A wave that vibrates the medium at right angles, or perpendicular to the direction that the wave travels.

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A wagon has a force of 5 Newtons pushing it east and a force of 5 Newtons pushing it west.  What happens to the wagon?

• It does not move.
• It moves north.
• It moves south.

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Do balanced forces or unbalanced force cause a change in position?

• Balanced Forces
• Unbalanced Forces

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Kinetic energy is energy in _____________. 

• Change
• Looks
• Motion
• Altitude

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The tendency of a stationary object to resist being put into motion is known as

• acceleration
• inertia
• weight
• velocity

What is the total force and direction?

• 50N to the right
• 350N to the right
• 50N to the left
• The cart doesn't move

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NGSS.MS-PS2-2

NGSS.MS-PS2-1

According to Newton's second law of motion, in which of the situations is the object accelerating?

• a book on a shelf
• a rock sitting on the ground
• a helium balloon tied to a lamp post
• a ball that has been thrown upward

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True or false?  In space sound travels and light does not.

• True
• False