Which of the following is true about how contamination moves in groundwater?
A) Contamination moves up the slope of groundwater.
B) Contamination moves opposite to the direction of groundwater flow.
C) Contamination introduced into the ground does not move.
D) Contamination spreads out as it moves, forming a widening plume.
D) Contamination spreads out as it moves, forming a widening plume.
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Why is the air over an open flame always moist?
A. One of the products of combustion is water vapor. B. The hot flame vaporizes the water in the air above the flame. C. Warm air contains more humidity than cold air. D. None of the above is true.
El Niño Southern Oscillation events can cause flooding from both a rise in sea level and high precipitation
Indicate whether the statement is true or false
Which of the following is NOT a main type of mineral deposit?
A. precious metals B. base metals C. gemstone D. industrial rocks and minerals E. all of these are types of mineral deposits
A tomato plant is devastated by tomato wilt, a type of fungus that infects the soil with spores and returns every year to attack more tomato plants. One effective way to combat this fungus using ecological/cultural pest control is to
A) keep dead tomato plants from the prior year around to try to divert the fungus to the dead plants. B) spray a broad-spectrum insecticide over your garden before and after the crops come up. C) plant something other than tomatoes in this part of the garden next year. D) rake the soil before planting next year's tomatoes.