How many elements comprise 99% of all the mass of all living things on Earth?

a. 4
b. 9
c. 11
d. 15
e. 23


a

Environmental & Atmospheric Sciences

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How much heat energy is needed to turn 1 gram of water at 100 degrees Celsius into water vapor?

-5.4 calories of heat energy -54 calories of heat energy -540 calories of heat energy -5400 calories of heat energy

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In clear weather, the air next to the ground is usually ____ than the air above during the night and ____ than the air above during the day

a. hotter; more humid b. colder; less humid c. warmer; colder d. warmer; warmer e. colder; warmer

Environmental & Atmospheric Sciences

One way to deal with the creation of solid wastes begins with the question "How can we avoid producing so much solid waste?" This approach is called ____.

A. waste reduction B. waste recycling C. secondary pollution prevention D. primary pollution prevention E. integrated waste management

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With respect to the isobars, describe the flow around an upper-air cyclone in the Northern Hemisphere

What will be an ideal response?

Environmental & Atmospheric Sciences