What is one of the most important aspects about West Antarctica with respect to global sea level?
A) It has large composite volcanoes whose eruptions have changed global climate.
B) It cools the adjacent oceans, causing them to contract.
C) It has large floating ice shelves that could be detached and melted.
D) It has large volcanoes whose eruption beneath the ice could cause extremely large floods.
C) It has large floating ice shelves that could be detached and melted.
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Relatively cooler magma in an erupting volcano is apparently the result of _______.
a - the amount of water present b - depth of magma formation c - the relatively high amount of silica present d - position of astronomical bodies e - surface salinity
New genetic characteristics can be added to prokaryotic organisms by
a. mutation. d. divergent evolution. b. natural selection. e. mitosis. c. artificial selection
How are pristine conditions of the atmosphere determined?
A) Research conducted prior to the Industrial Revolution B) Seawater samples from deep within polar ice packs C) Sediment samples D) All of these choices
Which of the following is a common use of a mineral?
A. phosphorous is used in fertilizer B. halite is used as salt C. feldspar is used in ceramics D. hematite and magnetite are used for iron and steel E. All of these choices are correct.