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Question
Nitrogen (
) isA) a key component of life, integrated into our bodies directly from the air.
B) cycled through the environment via the activity of bacteria.
C) a product of the radioactive decay of a form of potassium in the crust.
D) now measured at 20.946% by volume in the homosphere.
Answer
This answer is hidden. It contains 1 characters.
Related questions
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The key idea behind the scientific method is
A) the use of intuition in testing theories.
B) an appeal to supernatural explanations when natural explanations have not yet been found for a phenomenon.
C) the testing of ideas through controlled observations and experiments.
D) unbridled speculation about the world.
Q:
Which of the following is the most strongly supported by experimental and observational evidence?
A) speculation
B) hypothesis
C) educated guess
D) theory
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B) place
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In order to study the planetesimal hypothesis, astronomers study this process in other parts of the Galaxy.
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The Solar System, Sun, and Earth formed about 4.6 billion years ago.
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Which of the following is true of the biosphere?
A) It is never referred to as the ecosphere.
B) It exists on other planets in the solar system.
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C) written scale.
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