The electric current in common wires is made up of

A. ions.
B. electrons.
C. protons.
D. all of the above


Answer: B

Environmental & Atmospheric Sciences

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Hydrothermal vent communities are unusual because

A) a primary producer synthesizes organic matter. B) a producer exists without sunlight. C) a consumer eats a producer. D) there are no producers in the ecosystem.

Environmental & Atmospheric Sciences

Which has a higher porosity: sand or sandstone? Why?

What will be an ideal response?

Environmental & Atmospheric Sciences

In core economies, which of the following dominate the food production process?

A) consumers B) transnational corporations C) government officials D) agricultural workers

Environmental & Atmospheric Sciences

Papers that are published in a scientific journal are examples of _____ sources

Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences