Plant photosynthesis increased the concentration of ____________________ in the earth's early atmosphere.
Correct Answer:
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Q37: The majority of atmospheric ozone (about 97%)
Q38: What is a region in the atmosphere
Q39: The word "weather" is defined as_.
A) the
Q40: The thermosphere is where charged particles from
Q41: The earth's atmospheric pressure always _ with
Q43: Scientists pose hypotheses, or informed predictions about
Q44: Instructions: Choose one answer from each pair
Q45: If the weather forecast predicts the arrival
Q46: Instructions: Choose one answer from each pair
Q47: The basis for dividing the earth's atmosphere
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