Term
You may hear about an Earth Impact Warning at a certain level on the Torino Scale. That scale ranges from zero to
a. 100.
b. 1.
c. 5.
d. 10.
e. 1000. |
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Definition
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Term
Our Sun sends out intense streams of charged particle radiation. The radiation is prevented from hitting the Earth's
atmosphere by
a. the Earth's Moon.
b. the Earth's gravitational
c. the tilt of the Earth's rotation axis.
d. the Earth's magnetic |
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Definition
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Term
The idea that a supernova is preceded by a huge burst of neutrinos is
a. no longer believed to be correct.
b. a prediction that has now been observed.
c. a prediction that has not yet been observed.
d. a purely theoretical idea that cannot be tested. |
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Definition
| b. a prediction that has now been observed |
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Term
Which of the following substances is the smallest fraction of our atmosphere?
a. Argon
b. Nitrogen
c. Water
d. Oxygen
e. Carbon Dioxide |
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Definition
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Term
A proton is the nucleus of an atom of
a. Helium.
b. Protonium.
c. Hydrogen.
d. Deuterium.
e. Positronium. |
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Definition
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Term
Cepheid variable stars with the same luminosity usually
a. have similar periods.
b. have the same apparent magnitude.
c. belong to the same star cluster.
d. are at the same distance from us. |
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Definition
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