TN Ready Science

A copper wire is made of copper (Cu) atoms. Which of the following best describes the copper atoms?

• They would be mostly the same, but some would have more protons than others.

• They are all basically the same, but the number of neutrons could vary.

• They are all exactly the same.

• They each have different numbers of protons, neutrons, and electrons.

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What effect will the south pole of one magnet have on the south pole of another magnet?

• Repulsive

• Attractive

• Combative

• No effect

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This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Remove all the coils and the nail.

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This picture represents

• Reflection

• Refraction

• Transmission

• Absorption

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In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

• wire, iron, electric

• electric, wire, iron

• iron, electric, wire

• excited, hair, apple

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An astronaut throws a baseball in space and it continues going. This applies to which of Newton's laws?

• 1st

• 2nd

• 3rd

• 4th

Do the birds shown have genetic variation? Explain.

• Yes, they all look different.

• Yes, they all look the same.

• No, they all look different.

• No, they all look the same

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Which wave has a higher frequency?

• 1

• 2

• 3

Which fossil layer contains organisms most similar to present day organisms?

• 1

• 2

• 3

• 4

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Which is an example of artificial selection?

• Birds with different beaks

• A cheetah passing on the strong gene

• A person choosing which dogs to breed

• A plant passing on strong roots