Unit 8 Review Class

What keeps planets in the solar system from moving in straight lines through the galaxy?

• A. Light energy

• B. Gravity

• C. Inertia

• D. Potential energy

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Since 1990, the Hubble Space Telescope has been orbiting Earth and sending back images of

space for astronomers to view and interpret. What benefit is there to a telescope that orbits

Earth?

• A. Views from outer space telescopes are clearer than those from Earth-based telescopes.

• B. Earth-based telescopes have a greater range of light detection.

• C. Human error is reduced by the use of the Hubble telescope.

• D. The Hubble telescope is used to examine events that cannot be explained.

"Made mostly of ice", fits best under which heading in the Venn diagram below?

• A. Asteroid

• B. Meteor

• C. Comet

• D. Section X

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In space travel, a probe is a vehicle designed to carry instruments, but not crew. To which of

the following places would we most likely send a probe?

• A. The International Space Station

• B. Inside the Sun

• C. Mountain top

• D. Saturn

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Objects made of ice, gas and dust and orbit our sun are called:

• A. Asteroids

• B. Meteors

• C. Comets

• D. Planets

Why does it take Neptune so long to revolve around the Sun?

• A. The Sun is applying large amounts of gravity on the planet, slowing it down.

• B.

  Neptune has a large diameter causing the planet to be less aerodynamic, slowing it

  down.

• C. Neptune is such a long distance away that it has a large orbital path.

• D.

  Neptune is rotating fast for its size, and the energy of its orbit is being transferred into

  rotational speed.

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Earth has a definite orbit within the solar system. This orbit is mainly a result of the

• A. mass of the Sun.

• B. size of the Moon.

• C. pulling force of other planets.

• D. distance between other planets.

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The decision to visit planets other than earth is not supported by everyone. An individual

that would argue against sending humans to other planets would be most reasonable in

explaining that...

• A. water and food cannot be brought into space and the trip would be too long

• B. the process is very expensive and alien life would not welcome human contact

• C.

  the process is very expensive and it would be difficult to support human life for such a

  long journey

• D. humans cannot survive the journey into space and the process is very expensive

The moon remains in orbit around Earth because of the force of —

• A. Earth's rotation

• B. the moon's rotation

• C. Earth's gravity

• D. the sun's gravity

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Which of the following represents characteristics of the four planets closest to the Sun?

• A. Larger planets

• B. Gas giants

• C. Rocky (terrestrial) planets

• D. 4 or more moons