Discuss how satellites are used in oceanography. What will be an ideal response?
Satellites have been used to collect oceanographic data since 1978. Satellites beam radar
signals off the sea surface to determine wave height, variations in sea-surface contour and
temperature, and other information of interest to scientists. The first of a new generation of
oceanographic satellites was launched in 1992, TOPEX/Poseidon, as the project is known, is
a satellite orbiting 1,336 kilometers (835 miles) above Earth in an orbit that allows coverage
of 95% of the ice-free ocean every 10 days. The satellite uses a positioning device that allows
researchers to determine its position to within 1 centimeter (1?2 inch) of Earth’s center. The
radars aboard can then determine the height of the sea surface with unprecedented accuracy.
Other experiments in this 5-year program include sensing water vapor over the ocean,
determining the precise location of ocean currents, and determining wind speed and direction.
Jason-1, launched in 2001, monitors global climate interactions between the sea and the
atmosphere. AQUA collects data about Earth's water cycle, including evaporation from the
oceans, water vapor in the atmosphere, phytoplankton and dissolved organic matter in the
oceans, and temperature.
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Which of the following is a consequence of acid deposition?
A) It increases the likelihood of low-lying ground fogs. B) It is increasing the rate of global warming. C) It leaches important minerals from soils. D) It creates rainwater that can damage skin cells or cause cancers. E) It results in offshore eutrophication, damaging coral reefs.
Natural increase factors in urban growth result from ________ while immigration results from ________.
A. Push and pull factors; improved medical care B. Better sanitation; improved medical care C. Improved medical care; push and pull factors D. Improved medical care; better sanitation E. Push and pull factors; better sanitation
The great environmental benefit of hydropower as an energy source is that it
A) produces few atmospheric pollutants. B) benefits water quality. C) has no impact on local plant and animal life. D) maintains the pristine quality of the body of water on which it is built. E) both that it benefits water quality and it has no impact on local plant and animal life.
The number of languages spoken in India is over
A. 1600 B. 2000 C. 3500 D. 4200