Study Flashcard Set: Components of the Universe

Front

Order the components of the universe from largest to smallest: Planet, star, nebula, galaxy.

Back

Galaxy, nebula, star, planet

Tags

112.20.b.8.A

Front

What is the best description of a galaxy?

Back

A group of billions of stars, dust, and many other types of objects held together by a gravitational attraction

Tags

112.20.b.8.A

Front

Scientists observe a large, rocky, irregularly shaped object orbiting the sun. This object would best be classified as -

Back

an asteroid

Tags

112.20.b.8.A

Front

A large sphere of plasma with density and temperature great enough to cause a nuclear reaction at its core would best be classified as a -

Back

star

Tags

112.20.b.8.A

Front

Order the celestial objects from smallest to largest: Galaxy, solar system, universe, universe, galaxy, solar system, solar system, galaxy, universe, universe, solar system, galaxy.

Back

Solar system, galaxy, universe

Tags

112.20.b.8.A

Front

In January of 1996, an amateur astronomer discovered a small, icy object traveling around the sun with a long tail composed of gas and dust. What was most likely discovered?

Back

comet

Tags

112.20.b.8.A

Front

Why can't scientists observe the entire shape of the Milky Way galaxy?

Back

The Earth is a part of the Milky Way galaxy

Tags

112.20.b.8.A

Front

According to the Big Bang Theory, all matter and energy was focused into one point and then it exploded and expanded outward. The universe is still (shrinking, expanding) today.

Back

expanding