Explain the differences between the magnitude and the intensity of an earthquake, in terms of how
each is measured or observed. What will be an ideal response?
Magnitude is measured by instruments (seismographs), while intensity is measured by people's
reactions and observations.
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Invasive species have been
A) hunted to extinction in most places where they occur. B) successfully controlled in most regions using predators, viral agents, or bacterial agents. C) successfully controlled by the introduction of other alien species that are natural competitors. D) an ecological problem in North America since the first European colonists arrived.
Which of the following is NOT a source of material for soil?
A. CO2 gas from roots B. leaves and other plant debris C. weathered rock and sediment D. water from precipitation and snowmelt E. All of these are a source of material in soil.
Responsible stewardship in the coming decades will require global energy policies that promote
A) both sustainability and technological efficiency. B) productivity and economic prosperity in developing nations. C) the development of abundant and inexpensive fossil fuels such as shale gas. D) additional exploration of shale oil and natural gas resources.
A change of one degree on the Celsius scale is ____ a change of one degree on the Fahrenheit scale
a. equal to b. larger than c. smaller than d. in the opposite direction of e. insignificant in comparison to