Question 20 (Multiple Choice Worth 1.0 points)
We study the sun for various reasons. One such reason is that events on the sun, such as solar flares and prominences can affect the solar wind/weather that reaches the earth. This in turn can have a negative effect on
various types of communications, including satellite transmissions
daily weather patterns for weeks after the event.
climate.
the amount of ultraviolet radiation reaching the surface of the earth.
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Question 21 (Multiple Choice)
Which of the following are two conditions that help the process of fossilization?
deep covering of sediments
rapid burial
organisms with hard parts
soil with high mineral content
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Question 22 (Multiple Choice Worth 1.0 points)
We live in the Milky Way galaxy. The Milky Way is classified as a _______ galaxy.
elliptical
spiral
irregular
spherical
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Question 23 (Multiple Choice Worth 1.0 points)
The sun in our solar system is a star. The energy produced in the sun is produced by the process of
photosynthesis.
radioactivity.
fusion.
convection.
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Question 24 (Fill-In-The-Blank Worth 1.0 points)
When an earthquake occurs, seismologists note two locations, the focus and the epicenter. The __________is the actual point of earth movement underground.
Answer for Blank 1:
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Question 25 (Multiple Choice Worth 1.0 points)
In general this statement describes the relationship between the mass of a star and the length of time that it will burn.
The more massive a star is at "birth," the longer its life.
False
True
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Question 26 (Fill-In-The-Blank Worth 1.0 points)
Scientists have used a combination of relative dating and absolute dating techniques to create the__________, the "map" of past eras of earth's history.
Answer for Blank 1:
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Question 27 (Multiple Choice Worth 1.0 points)
Scientists believe that in the new universe, shortly after the initial "Bang," four forces became distinct and began to act upon the matter that was present. Which of the forces is believed to be responsible for the attraction between particles of matter, pulling clouds of gases and dust, together to form the stars, planets, and other heavenly bodies?
weak nuclear forces
electromagnetism
strong nuclear forces
gravity
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