Which of the following statements is false?
a. Heat lowers dissolved oxygen in streams and rivers.
b. Organic wastes that can be decomposed by aerobic bacteria reduce the amount of oxygen in the water supply.
c. Toxic chemicals released from industries can result in fish kills.
d. Inorganic nutrients such as fertilizers have no adverse effects on aquatic ecosystems.
e. Sediment can cloud water and reduce photosynthesis.
D
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Environmental protection has been proven to ________ the number of available jobs because ________.
A. Stabilize; the use of nonrenewable resources is stabilized, and jobs are scarce anyway B. Stabilize; it limits the use of nonrenewable resources (as in the case of the logging industry) C. Decrease; it limits the use of nonrenewable resources (as in the case of the logging industry) D. Decrease; it negatively affects economic growth E. Increase; labor is usually substituted for natural resources (as in the case of recycling)
A(n) ________ is likely to host a waterfall or steep rapids today
A) outwash plain B) horn peak C) striated drumlin D) hanging valley
Many metals are extracted from ores that contain sulfide minerals
Indicate whether the statement is true or false
Why are spring tides highest when the Moon is near perigee?
a) The Moon is moving fastest in its orbit at that time b) The Moon is farther from Earth, so gravitational force is greater c) The difference between solar and lunar tides is maximum at this time d) The Moon and Sun are lined up e) The Moon is closer to the Earth, so gravitational force is greater