What do meteorites tell us about Earth's origin?
What will be an ideal response?
Scientists use the composition of meteorites to infer the composition of Earth's interior, and age dating helps constrain the time of formation of the solar system. They also provide key information on the likely water content of the early mantle.
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The first jawed fish were the:a
placoderms. b. acanthodians. c. ostracoderms. d. chrondrichthyes. e. agnatha.
Oxygen can be depleted from a body of water by ____.
A. viruses and parasitic worms B. biodegradable wastes C. sediments and suspended matter D. compounds such as oil, plastics, solvents, and detergents E. photosynthetic organisms
Why are many U.S. landowners (including farmers and ranchers) welcoming wind farms and becoming developers?
What will be an ideal response?
Coral reefs are formed by _____
a. volcanic eruptions b. wave refraction c. longshore current sand deposition d. sea level rising above ridges that formed on land e. the accumulation of calcium carbonate skeletons of marine animals