Which of the following is the basis of one Earth year?

a. One complete revolution of Earth around the Sun
b. One complete rotation of Earth on its axis
c. One complete rotation of the Moon on its axis
d. One complete cycle of the phases of the Moon


Answer: a. One complete revolution of Earth around the Sun

Environmental & Atmospheric Sciences

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The policy of protecting domestic infant industries is called ________

What will be an ideal response?

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The world's largest arid desert is the Sahara

Indicate whether this statement is true or false.

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The coldest of all air masses is

a. ?mT. b. ?mP. c. ?cT. d. ?cF. e. ?cA.

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The cells involved in blood clotting are

A) red blood cells. B) white blood cells. C) platelets. D) hemoglobin.

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