Astronomy Question Preview (ID: 18529)

Astronomy.[print questions]

The atmosphere of Venus consists of thick yellow clouds formed mostly from
a) helium
b) sulfur
c) hydrogen
d) carbon

Why does the amount of daylight change during the course of the year?
a) The amount of light and heat radiated by the sun changes at different times of the year.
b) The distance between the Sun and Earth changes from summer to winter.
c) The North Pole points more toward the Sun at one time of the year than another.
d) Earth rotates at different speeds at different times of the year

Daylight in the Northern Hemisphere lasts longer in summer than in winter, and the change in the length of day happens in a predictable pattern. Which statement correctly explains this condition of Earth's environment?
a) The sun moves closer to Earth in summer and farther away in winter.
b) Earth, with its tilted axis, moves around the Sun in a predictable way.
c) There is a predictable change in the amount of heat and light given off by the sun.
d) Earth turns slower in summer than it does in winter.

How does the number of hours of daylight compare to the number of hours of darkness on March 20,the first day of spring in the Northern Hemisphere?
a) The hours of daylight and darkness are the same.
b) There are more hours of darkness than daylight
c) There are more hours of daylight than darkness
d) The number of hours of daylight and darkness cannot be predicted in advance.

Which planet is characterized by thick cloud cover, greenhouse effect, vast planins, and high mountains?
a) Uranus
b) Saturn
c) Mercury
d) Venus

Which planet is characterized by polar ice caps, a pink sky, a rust-colored surface, large volcanoes, and surface channels (old river beds)?
a) Uranus
b) Pluto
c) Mars
d) Saturn

Which planet has a great red spot and many moons
a) Neptune
b) Jupiter
c) Mars
d) Mercury

The ozone layer in Earth's upper atmosphere is important to living organisms because it
a) absorbs harmful ultraviolet radiation from the Sun
b) breaks down harmful pollutants into normal atmospheric gases.
c) supplies the oxygen living organisms require to carry on respiration.
d) traps heat close to Earth's surface to maintain temperatures necessary for life.

Earth is tilted 23.5 degrees on its axis and revolves around the sun creating seasons. What angle would Earth's tilt need to be in order for there to be no seasons?
a) 0 degrees
b) 45 degrees
c) 60 degrees
d) The tilt doesn't affect seasons

Which planet is closer to the Sun than Earth is to the Sun?
a) Jupiter
b) Venus
c) Saturn
d) Mars

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