An astronomer tells you that he has discovered a new planet that he calls Planet X. All he knows about Planet X so far is that it has a very dense atmosphere with a temperature approximately 5 times warmer than that of Earth
What hypothesis can you reasonably make regarding the atmosphere of Planet X?
A) The atmosphere of Planet X has a higher concentration of greenhouse gases than Earth's does.
B) Planet X cannot contain water in any form.
C) The nitrogen cycle does not operate on Planet X in the same way it does on Earth.
D) The atmosphere of Planet X must not contain any oxygen, so people couldn't live there.
A
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The Miller and Urey experiment shows that complex organic molecules
A. may have formed in hydrothermal vent habitats on early Earth. B. were probably brought to Earth by meteorites. C. may have been formed when lightning storms occurred on early Earth. D. may have been generated in volcanoes on young Earth.
Geoengineering proposals to mitigate climate change include ________.
A. development of wind turbine farms in the open ocean B. large-scale iron fertilization C. increasing rates of denitrification D. enhancement of deep-water formation
Hurricanes are associated with all the following except ________.
A. low pressure B. heavy rain C. strong winds D. clockwise rotation in the Northern Hemisphere E. storm surge
What best describes kame-and-kettle topography?
A. surface shaped entirely by erosion by glacier B. wide depressions punctuated by small till hills C. moraine surface with mounds and depressions D. deposition into a large flat outwash plain of till E. mounds and hollows carved into a mountain