All of the following have occurred over long periods of time on Earth. Which one is not thought to have played a major role in long-term changes in Earth's climate?

A) a gradual rise in the atmospheric content of oxygen
B) changes in the Earth's axis tilt
C) changes in the Earth's overall reflectivity
D) changes in the atmospheric concentration of greenhouse gases


A) a gradual rise in the atmospheric content of oxygen

Physics & Space Science

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Venus is very hot because its atmosphere is rich in carbon dioxide

a. True b. False Indicate whether the statement is true or false

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The stars in our sky twinkle in brightness and color because of

A) turbulence in the Earth's atmosphere. B) rapid changes in the brightness and colors of stars caused by changes in their spectra. C) light pollution. D) the bubbling and boiling of gases on the surfaces of stars.

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If two stars are the same size and one is twice the temperature of the other, how much more luminous is the hotter one?

What will be an ideal response?

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The four fundamental forces in nature are the strong, weak, electromagnetic, and gravitational interactions

Indicate whether the statement is true or false

Physics & Space Science