When the Sun becomes a red giant

A) some life on Earth may still be able to survive on the surface
B) life will probably not be able to survive even beneath the surface
C) life may still be able to survive in the atmosphere
D) the Earth will be destroyed


B

Physics & Space Science

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The diagram illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an absorption spectrum?

image

a. 1
b. 2
c. 3
d. 2 and 3
e. none of them

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Between now and 2024, in which year will there be no opportunities for a solar eclipse?

a. 2015 b. 2016 c. 2018 d. 2021 e. 2024

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Why do astronomers believe chondrite meteorites are about 4.6 billion years old-formed when the Solar system formed?

A. There is no other reasonable time period in the solar system's history when any meteoroids could have formed. B. Radioactive dating can be used to determine their age. C. Their chemical composition suggests they are pieces broken off Mars, which is believed to have formed at that time. D. The chemicals they are made of were only common at the formation of the solar system.

Physics & Space Science

A galvanometer can be calibrated to measure

A) electric current. B) electric voltage. C) both of these D) none of these

Physics & Space Science