Ground-source heat pumps use the difference in temperature between the air and soil to warm and cool buildings
The upper 10 ft of the Earth is always at a constant temperature of ________, which is ideal for warming buildings in the winter and cooling them in summer.
A) 50-60°F B) 100-20°F C) 70-80°F D) 225-60°F E) over 360°F
A
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Why do some officials in European Union countries advocate the strategy of pollution prevention?
A. They would to support the manufacturing industries. B. They want to learn about substitutes for toxic chemicals. C. They support the threshold dose-response model. D. They have the leading epidemiologists globally. E. They are not interested in experimental research.
Macroalgae/seaweeds can be best differentiated from true plants because macroalgae/seaweeds ________.
A. are photosynthetic B. are prokaryotic C. have no true roots, leaves, or stems D. are mostly unicellular E. have no chlorophyll
A chunk of independently floating ice is an ice ________
A) floe B) pack C) berg D) shelf E) chunk
During a meltdown, nuclear power plants explode like a bomb, releasing huge amounts of radioactive material into the environment.
Answer the following statement true (T) or false (F)