If an air parcel is completely at rest, which of the following forces can make the parcel begin to move?

A. gravity
B. friction
C. centripetal
D. pressure gradient


Answer: D

Environmental & Atmospheric Sciences

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How does burning fossil fuels impact Earth's climate?

A) It cools the climate by exhausting oxygen into the air. B) It warms the climate by increasing atmospheric water vapor. C) It warms the climate by increasing greenhouse gas emission. D) It does not affect Earth's climate.

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In primary recycling, waste products are converted into different products

Indicate whether the statement is true or false

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What is the highest mountain in the Andes?

A) Aconcagua B) Machu Pichu C) Denali D) Altiplano E) none of these

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Smoking causes the premature death of more people through heart attacks than through lung cancer.

Answer the following statement true (T) or false (F)

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