A ________ is a naturally occurring solid chemical element or inorganic compound with a distinct composition and a crystal structure
A) nutrient B) rock C) sediment D) horizon E) mineral
Answer: E
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The widest continental shelf on Earth is located in the ____________ Sea. Fill in the blank(s) with the appropriate word(s)
The niche of an organism is the result of many years of natural selection.
Answer the following statement true (T) or false (F)
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.
Manipulative experiments
A. are most often conducted in a laboratory. B. are not possible. C. do not allow the scientist to control variables. D. are not useful to ecologists because they depend on the natural environment.