Final Exam Review

If aliens abducted Ms. Avila and took her to a planet that orbits a star that is 10 light years away, how long would it take Ms. Avila to steal a spaceship and drive back home, based on speed of travel?

• 100 years traveling at twice the speed of light

• 10 years travelling at the speed of light

• 5 years traveling at half the speed of light

• 10 years traveling at one-tenth the speed of light

The Sun is a star that is 8.3 light-minutes from Earth. Which of the following conclusions can be drawn?

• The diameter of this star is more than 8 times larger than the Earth.

• Light we see from the Sun took more than 8 minutes to reach Earth.

• This star takes a little more than 8 years to make one rotation.

• The gravity of the Sun would make an object weigh 8 times more than on Earth.

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NGSS.MS-ESS1-2

NGSS.MS-ESS1-3

NGSS.MS-PS2-4

A light-year is a unit for measuring the size of which of the following?

• planets

• asteroids

• galaxies

• stars

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NGSS.MS-ESS1-3

Lexi is stargazing and points out a star called Sirius A which is estimated to be 8.6 light years away from us. Which of the following is the correct way for Lexi to understand this information?

• It takes a little more than 8 years for Sirius A to make one orbit around the center of the galaxy..

• The diameter of Sirius A is about 8 times bigger than the Sun´s diameter.

• Light traveling from Earth to Sirius A would take a little more than 8 years to get there.

• Light coming from Sirius A is about 8 times brighter than the light from our Sun.

If you want to describe distances between extremely large objects, like galaxies, what unit would be better to use?

• Mile

• Light-year

• Kilometers

• Meter

Tags

NGSS.MS-ESS1-3

Which of the following accurately describes the hierarchy, from smallest to largest components?

• Galaxy → universe → solar systems → planets

• planets → galaxies → solar systems → universe

• planets → solar systems → galaxies → universe

• Solar systems → universe → galaxies → planets

What is a galaxy?

• a system composed of gas and dust and billions of stars held together by magnetic field.

• a system composed of gas and dust and billions of stars held together by gravity.

• a system composed of gas and dust and smaller galaxies

• a system composed of billions of planets

Describe a star.

• Gaseous spherical objects that produce their own light.

• Planets are rocky smaller spherical objects that orbit a star.

• a system of planets orbiting a star

• a system of gas and dust and billions of stars.

Where is everything, all space, located?

• The galaxy has billions of universes. Each universe has thousands of stars.

• The universe has hundreds of galaxies. Each galaxy has thousands of stars.

• The universe has billions of galaxies. Each galaxy has billions of stars.

• The galaxy has hundreds of universes. Each universe has thousands of stars.

Describe a planet.

• Gaseous spherical objects that produce their own light.

• Planets are rocky smaller spherical objects that orbit a star.

• a system of planets orbiting a star

• a system of gas and dust and billions of stars.