Much of the early hydrogen and helium escaped the earth's atmosphere into space because ________
A) Solar winds were strong
B) The earth's gravity was strong
C) Solar winds were weak
D) The earth's gravity was weak
E) All of the above
D
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Discuss the strengths and weaknesses of four different types of weather forecasting methods.
What will be an ideal response?
As temperature increases, the amount of energy available for evaporation
A) increases. B) decreases. C) remains constant.
Which of the following is true of ice, water and steam?
A) They are three different chemical substances. B) They are the same substance in different chemical states. C) They are the same substance in different physical states. D) They are the same substance in different chemical and physical states.
Many western states rely heavily on snowmelt for their municipal water supplies
Indicate whether the statement is true or false