Question 1

What is the main difference between conductors and insulators?

Accepted Answer

Electrical currents move through conductors better than insulators.

Answer

Conductors have a neutral charge and insulators have a negative charge.

Answer

Electrical currents move through insulators better than conductors.

Answer

Insulators are positively charged and conductors are negatively charged.

Question 2

The temperature outside has been below 32F for a few days. What is likely true about bodies of water nearby?

Accepted Answer

Smaller lakes and ponds will have a layer of ice on the top.

Answer

The water will have boiled off from overheating.

Answer

They are frying up from too much evaporation.

Answer

Lakes and ponds will have turned to snow.

Question 3

Scientist look through a microscope and take an initial count of 250 cells. After two hours, a second count is taken, and 450 cells are counted.

What can the scientists most likely conclude?

Accepted Answer

The cells have divided to create more cells.

Answer

The cells have moved from another part of the cell.

Answer

The cells are swollen from taking in nutrients.

Answer

The cells have divided to get bigger in size.

Question 4

What is the function of the cell membrane?

Accepted Answer

holding the cell together

Answer

producing a jellylike substance

Answer

releasing energy

Answer

controlling everything the cell does

Question 5

Electrical energy is the flow of electrons. What do you need to allow a continuous flow of electrons?

Accepted Answer

closed circuit

Answer

series circuit

Answer

parallel circuit

Answer

open circuit

Question 6

Some materials do not readily allow electrons to pass through them. What are these materials called?

Accepted Answer

insulators

Answer

conductors

Answer

fuses

Answer

transformers

Question 7

Which of these substances would be best to use for conducting electricity in a circuit?

Accepted Answer

copper

Answer

rope

Answer

plastic

Answer

wood

Question 8

What happens to liquid water if it cools to 0 Degrees Celsius?

Accepted Answer

It will freeze and change to a solid.

Answer

It will only get a little cooler.

Answer

It will only get a little warmer.

Answer

It will boil and change to a gas.

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