A rising parcel of air that does not exchange heat with its surroundings is an example of?
a. ?isothermal ascent.
b. ?an adiabatic process.
c. ?forced lifting.
d. ?advection.
e. ?convection.
ANSWER: b
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If a neutral element has the following chemical symbol, how many electrons does it have? 
O
A. 18 B. 12 C. 24 D. 6 E. none of the above
Which of the following will contribute to water conservation?
A) watering lawns at night, using low-flow faucets, and landscaping with native plants B) planting non-native wetland plants for landscaping C) washing dishes by hand D) watering lawns during peak sunlight hours, when plants need water most E) using aerial sprays for crop irrigation
Why do rainbows have a curved shape?
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The greatest source of both nitrogen and phosphorus entering Chesapeake Bay is ________
A) urban fertilizer runoff B) agriculture C) municipal and industrial wastewater D) septic systems E) natural sources