Granite is a type of:
a. volcanic rock.
b. metamorphic rock.
c. intrusive igneous rock.
d. extrusive igneous rock.
e. sedimentary roc
C
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A polymorph can be defined as
A) a set of silicate minerals. B) minerals that have the same chemical formula, but different crystal structures. C) minerals that have the same crystal structure, but different chemical formulas. D) minerals that have the same chemical formula and crystal structure, but exhibit different physical properties.
The wind-chill factor
a. ?relates body heat loss with wind to an equivalent temperature with no wind. b. ?indicates the temperature at which water freezes on exposed skin. c. ?takes into account humidity and air temperature in expressing the current air temperature. d. ?tells farmers when to protect crops from a freeze. e. ?determines how low the air temperature will be on any given day.
Judge the following sentence according to the criteria given below. Grains are easier to move in water than air because the grains effectively weigh less in water than in air
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct but the reason is incorrect. D) The assertion is incorrect but the reason is correct. E) Both the assertion and the reason are incorrect.
In what way can human practices contribute to desertification?
A) overgrazing by livestock B) growth of too much crop cover C) growth of trees D) irrigation with rainwater