Describe how the appearance of the most recent lava flows compares to the older lava flows. What processes have caused this difference.
What will be an ideal response?
The more recent lava flows are darker in color. This is due to chemical weathering processes.
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When a 100-kg block is simultaneously pushed toward the east with 200 N and toward the west with 150 N, the combination of these forces on the block is
A. 350 N west. B. 50 N west. C. 350 N east D. 50 N east.
Which of the following describes what always happens when air rises?
A. It contracts and cools. B. It contracts and warms. C. It expands and warms. D. It expands and cools.
The Galician Association of the Language and the Academy of the Galician Language disagree as to whether Galician should be considered a
A) pidgin or a creole. B) language family or a language branch. C) dialect or a language. D) standard language or a scheduled language. E) vigorous language or a developing language.
How much carbon dioxide was present in Earth's atmosphere 4 billion years ago?
A. Much more than now B. About the same amount as now C. Much less than now