Unit 1 LT 1

What does the heliocentric theory state?

• The Earth is the center of the universe.

• The sun is the center of the universe.

• The universe started with an explosion.

• The universe is still expanding today.

According to the geocentric theory, what is at the center of the universe?

• The sun

• The moon

• The Earth

• The Milky Way Galaxy

What does the Big Bang Theory explain?

• The sun is the center of the universe.

• The Earth is the center of the universe.

• The universe started with an explosion and is still expanding today.

• The Milky Way Galaxy is a spiral-shaped galaxy.

What is the universe composed of?

• Only the Milky Way Galaxy

• Only the solar system

• All of the solar systems, galaxies, and matter that exists

• Only stars and planets

What is a galaxy?

• A collection of planets orbiting a star

• A collection of stars, dust, planets, and rocky bodies

• A spiral-shaped galaxy that contains our solar system

• A theory that the sun is the center of the universe

What is a solar system?

• A collection of stars, dust, planets, and rocky bodies

• A collection of planets orbiting a star

• A spiral-shaped galaxy that contains our solar system

• All of the solar systems, galaxies, and matter that exists

What is the Milky Way Galaxy?

• A collection of planets orbiting a star

• A collection of stars, dust, planets, and rocky bodies

• A spiral-shaped galaxy that contains our solar system

• The theory that the Earth is the center of the universe

Who developed the Heliocentric Theory?

• Isaac Newton

• Albert Einstein

• Nicolaus Copernicus

• Galileo Galilei

What is gravity?

• The force of repulsion between pieces of matter

• The force of attraction between pieces of matter due to mass and distance

• The force of attraction between pieces of matter due to temperature

• The force of repulsion between pieces of matter due to mass and distance