Unit 1: Science - Components of the Universe Flashcards

Front

Universe components in order of size (smallest to largest)

Back

Planet (Ex: Earth) → Star (ex: Sun) → Solar System → Galaxy (example: Milky Way) → Universe

Front

What keeps the stars in a galaxy together?

Back

Gravity

Front

What is the Milky Way galaxy?

Back

A massive collection of billions of stars, dust, and planets that are all held together by gravity. It is our galaxy.

Front

Where is the Earth located?

Back

The Earth is located in the solar system, which is part of the Milky Way Galaxy. Our solar system lies on one of the galaxy's spiral arms.

Front

Light years measure what?

Back

Distance, not time—it's how far light travels in one year.

Front

Galaxy shapes include

Back

Spiral (like the Milky way) ; Elliptical (football-shaped) ; Irregular (no particular shape)

Front

Which type of galaxy is formed when two galaxies collide?

Back

Elliptical or Irregular (not spiral like ours)

Front

Big Bang Theory

Back

Explains how our universe began. The strongest evidence is that the universe is still expanding.

Front

Why are the Webb or Hubble telescopes placed in space?

Back

Because it is the best place to observe and have clear images of deep space.

Front

Most stars are made of what?

Back

Hydrogen and Helium