Rapid cooling of Earth's climate can be caused by ________.
A. plate tectonics
B. changes in Earth's orbit
C. volcanic activity
D. solar flares
Answer: C
Environmental & Atmospheric Sciences
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Where have the oldest dated sand grains been found on Earth?
A) Australia B) Canada C) The United States D) Africa
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Hydrothermal vents are only found in the depths of the ocean
Indicate whether the statement is true or false
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What are two possible scenarios for how accretion and continental growth happen?
What will be an ideal response?
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The half-life of I-131 is 8.0 days. If a medical treatment involves a dose of 100. mg of I-131, how much of the isotope remains after 16 days?
A) 12.5 mg B) 25.0 mg C) 50.0 mg D) 75.0 mg
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