How are the carbon, nitrogen, and oxygen cycles similar? a. They are all biogeochemical cycles.
b. They all involve an interaction between living and nonliving elements.
c. They are all part of the Earth system.
d. All of the above.

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Recommend a strategy for incorporating sustainable human activity into a tropical rain forest biome.