Which of the following, taken by itself, represents a net warming effect in the atmosphere?
A) Sulfates released from burning of fossil fuel
B) Black carbon emissions from the burning of diesel fuel
C) All aerosol emissions
D) Fine volcanic ash from eruptions
E) Impacts of asteroids
Answer: A
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The water table is ________.
a.) an underground mass of partly saturated rock b.) a boundary between unsaturated bedrock below and saturated bedrock above c.) a boundary between saturated rock below and unsaturated rock above d.) a boundary between unsaturated bedrock and an underground river
Plankton are categorized by their visibility or the means in which they are collected. Indicate whether the statement is true or false
Spring tides occur when
1.melting of the snow and ice makes water levels high.
2.the moon is 90° out of alignment with the sun and the Earth.
3.the Earth is closest to the moon.
4.the Earth, moon and sun are all in alignment.
________ is the predominant igneous rock of the continents.
A. Rhyolite B. Gabbro C. Granite D. Limestone E. Basalt