8th Grade Science Year Review

The mathematician and physicist that explained and described the relationship between a body and the forces acting on it and the motion in response to those forces was

• Albert Einstein

• Harry Hess

• Sir Isaac Newton

• Pablo Picasso

The law that states that an object will stay at rest and an object in motion will stay in motion is known as

• Newton's 1st law of motion

• Newton's 2nd law of motion

• Newton's 3rd law of motion

• The law of gravity

The law represented by the equation F = ma is

• Newton's 1st law of motion

• Newton's 2nd law of motion

• Newton's 3rd law of motion

• The law of gravity

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The law that states that for every action (force) there is an equal and opposite reaction (force).

• Newton's 1st law of motion

• Newton's 2nd law of motion

• Newton's 3rd law of motion

• The law of gravity

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Which of the following is part of the theory of natural selection?

• Individuals that acquire characteristics will pass those characteristics on to their offspring
• Most offspring of a species will survive to reproduce
• Individuals within the same population have identical traits
• Individuals that have favorable traits are more likely to survive and reproduce

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There are 3 species of birds on an island. Bird A has a heavy bill for eating big seeds and. Bird B has a sharply pointed bill for eating insects. Bird C has a sharp bill for eating insects and small seeds. If the insect population suddenly disappeared one season, which bird or birds would probably be least affected that season?

• Bird A
• Bird B
• Bird C
• Bird A and Bird B

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The overall charge of the nucleus is...

• Positive
• sometimes positive and sometimes negative
• neutral 
• negative

Neutrons are neutral. This means that...

• neutrons are not involved in chemical reactions
• neutrons are neither acidic nor basic
• neutrons do not have a charge
• neutrons do not have a mass

A hockey stick hits a puck on the ice. With respect to Newton's third law of motion, identify an action-reaction pair in terms of objects and forces

• the stick on the puck; the puck on the stick
• the stick on the puck; the puck on the ice
• the puck on the stick; the stick on the ice
• the stick on the ice; the ice on the puck

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A released balloon flies across the room. The balloon slows down as the forces become __________. 

• balanced
• frictional
• restricted
• unbalanced

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