Frost action involving water repeatedly freezing and thawing in cracks and pores in rocks is a type of chemical weathering
Indicate whether the statement is true or false
False
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An atom or group of atoms with one or more net positive or negative charges is called a(n) ____________________
Fill in the blanks with correct word
Could a warming trend in Colorado be caused by currents from the Pacific Ocean?
A) No; Colorado is too far away from the ocean. B) Yes; air currents can move over the mountains. C) No; ocean currents have a cooling effect. D) No; the warming effect of the sun overrides the effect of ocean currents on local Colorado weather.
In the colonial period, which European country had primary control of northwest Africa?
A) Spain B) Britain C) Portugal D) France E) Germany
This study of Minnesota prairie plots and drought resistance indicates that the highest resistance to drought was experienced when ________
A) there were at least 5 species per plot B) there were over 20 species per plot C) there were between 10 and 20 species per plot D) plant diversity exceeded 0.2 E) plant diversity attained 0.2