The ____________________ ____________________ hypothesis states that widespread glaciers covered Earth and
froze the seas during the Proterozoic. Fill in the blank(s) with the appropriate word(s).
snowball Earth
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If a stream-cut canyon is deep and narrow, which of the following is most likely to be true?
A) Rocks in the canyon walls are relatively hard and easy to erode. B) The stream is probably close to its base level. C) Downcutting is occurring faster than widening. D) The stream contains mostly small clasts, such as silt.
Where does the sand at a beach come from?
What will be an ideal response?
Major volcanic peaks of the Cascade Mountains, like Mt. Rainier, Mt. Shasta, Mt. Hood, and Mt. St. Helens, have been active volcanoes for 30 to 40 million years.
Answer the following statement true (T) or false (F)
Survival of the fittest refers to those individuals that leave the most descendants.
Answer the following statement true (T) or false (F)