Which of these four numbered features on the surface or in a cave is a stalactite?

A. 1
B. 2
C. 3
D. 4
E. None of these choices are correct.


Answer: D

Environmental & Atmospheric Sciences

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There are ________ stages in the Demographic Transition Theory

Fill in the blank(s) with correct word

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How do worms help plants grow?

A. They carry out chemical reactions that convert carbon dioxide to nitrogen. B. They add excrement, a source of nutrients, plus they produce air space by crawling through the soil. C. They are a source of minerals. D. They decompose organic material into compounds plants can use.

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About two-thirds of the world's oil is located in Saudi Arabia. Indicate whether the statement is true or false

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The strength of a rock

A. may depend on how long it has been subjected to stress. B. may be reduced by weathering or fracturing. C. varies with the kind of stress it is exposed to. D. All of the choices are correct.

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