Question: Choose your answer.

Which function do kidneys provide to maintain homeostasis?

OPTIONS:
- the removal of excess heat from the body
- the removal of carbon dioxide from the body
- the removal of excess oxygen from the blood
- the removal of nitrogenous wastes from the blood
My Answer: the removal of nitrogenous wastes from the blood

Question: Choose your answer.

Which environmental factor would most likely prevent an orange tree from surviving in the desert?

OPTIONS:
- the lack of moisture
- the high levels of heat
- the extra amount of wind
- the low levels of sunlight
My Answer: the lack of moisture

Question: Choose your answer.

Which of these will always produce a magnetic field?

OPTIONS:
- a bar of steel
- a bar of aluminum
- an electric current
- an electric charge
My Answer: an electric current

Question: Choose your answer.

Which explains the pattern of day and night?

OPTIONS:
- Earth orbits the sun.
- Earth spins on its axis.
- The sun only transmits light energy during the daytime.
- The sun only transmits light energy above the equator.
My Answer:
Earth spins on its axis.