Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the Earth's atmosphere?
A. water vapour and carbon dioxide
B. ozone and oxygen
C. nitrogen and carbon dioxide
D. oxygen and nitrogen
Answer: A
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Critical evidence for the Cretaceous-Tertiary boundary impact includes ________.
A. the discovery of a crater covered by jungle vegetation in Brazil B. an iridium anomaly in a thin layer of rock 65 million years old C. dinosaur fossils worldwide just above the layer of impact debris D. recovery of very large pieces of meteorite E. an Iranian deposit of reddish iron-bearing strata
A species of barnacle is transported by boat to a new port, where it begins to colonize boats and piers. If the species begins to outcompete other species and cause harm, then it would be considered a____________________ introduced species.
Fill in the blank(s) with the appropriate word(s).
A chemical or biogenic sedimentary rock consisting of gypsum is called
A) chert. B) rock salt. C) rock gypsum. D) dolostone.
One major way to help protect the atmosphere is to
A. quickly burn all remaining fossil fuels to encourage faster change to alternative fuels. B. compartmentalize air pollution, water pollution, and energy policies so that each department has its own focus. C. emphasize local control and responsibility for air pollution. D. control population growth. E. decrease use of renewable energy.