A persistence forecast could be quite accurate when:a
a frontal system approaches your location at constant speed.
b. you are positioned in the middle of a large, stationary air mass.
c. the weather has been unusually cold for several days.
d. upper level winds blow straight from west to east.
b
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Which of the following is not a requirement for photosynthesis?
A) sunlight B) water C) color D) a suitable substrate for plant growth E) nutrients
What causes magnetic stripes on the seafloor, such as those shown here?
A. Some volcanic rocks are formed in normal ways and others have pillows. B. Volcanic rocks in oceanic crust are covered by a variable thickness of sediment. C. Sometimes Earth's magnetic field points north and sometimes it points south. D. Some oceanic crust consists of volcanic rocks and some is composed of sediment.
The weathering reaction between rocks, air, and water is greatly aided by the presence of:
a. ammonia b. carbon dioxide c. hydroxide d. clay minerals
To be an artesian spring, a feature must:
a. contain salt water. b. flow above the local water table. c. lie below a cone of depression. d. flow for only part of the year. e. have been drilled or dug by people.