What is the role that depth can play on cooling and crystallization of igneous rocks?
What will be an ideal response?
Answer: (Ignoring nucleation sites, which can speed up the formation of large crystals) The general rule of thumb is the deeper the magma, the more preexisting rock surrounds and insulates it. Because the heat is retained longer, cooling occurs at a slower rate, which allows the atoms and molecules to move around more freely and combine to produce mineral crystals. This rate of intrusive cooling produces larger, visible mineral crystals.
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If Earth's mass hypothetically reduces to half with no change in its size, your weight
A. decreases. B. increases. C. remains the same. D. none of the above
What is the difference between stress and strain? What will be an ideal response?
Which of the following is a secondary pollutant in the troposphere but a beneficial component of the stratosphere?
A) Ozone B) Carbon monoxide C) Nitrogen oxides D) Carbon dioxide
What does ozone in the stratosphere protect us from?
A. sunlight B. infrared radiation C. x-ray radiation D. ultraviolet (UV) radiation E. lightning