The Earth's biosphere
A) consists of only terrestrial organisms, while the hydrosphere includes aquatic and marine organisms.
B) only includes the biotic components of an ecosystem, with the abiotic components being considered part of the lithosphere, hydrosphere, or atmosphere, respectively.
C) is more a theoretical construct than an observable sphere of study.
D) extends from the ocean floor to an altitude of approximately 8 km (5 mi) into the atmosphere.
D
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Which of the following best describes the experimental conditions under which an alkane can be chlorinated or brominated?
A) in the dark at room temperature B) only at room temperature upon exposure to light C) only in the dark at temperatures exceeding about 100°C D) either at room temperature upon exposure to light or in the dark at temperatures exceeding about 100°C
On an upper-level chart, in which direction does the wind blow?
A. It tends to blow at right angles to the isobars or contour lines. B. It tends to blow at constant speed. C. It tends to blow parallel to the contours. D. It tends to blow at an angle between 10 and 30 degrees to the contours and towards lower pressure.
The three major groups of rocks are ____________________, ____________________, and
____________________. What will be an ideal response?
Adding humus in a garden will most likely
A) decrease the nutrients of the soil and the water-holding capacity. B) increase the nutrients of the soil and the water-holding capacity. C) increase the nutrients of the soil but decrease the water-holding capacity. D) decrease the nutrients of the soil but increase the water-holding capacity.