Which component of galaxies gives off its own light?

• Cloud

• Dust

• Moon

• Star

What is the name of the galaxy that contains Earth?

• The Earth's galaxy

• The Milky Way

• The Solar System

• The Universe

What are the main components of the Milky Way?

• Dust, gas, stars, and objects that orbit the stars

• Dust, water, Earth, and objects that orbit Earth

• Gas, water, Earth and objects that orbit Earth

• Rocks, gas, stars, and objects that orbit the stars

Which of the following is a large, burning ball of gas?

• Asteroid

• Moon

• Planet

• Sun

Which of the following describes a planet?

• Burning ball of gases that emits its own light

• Large body of rock that revolves around the sun

• Large, round body that revolves around a star

• Round object that revolves around a moon

What is a large, rocky or metallic object that revolves around the sun?

• Asteroid

• Comet

• Galaxy

• Sun

Which of the following describes a solar system?

• A large group of stars that orbit, or revolve, around each other

• A small galaxy with millions to billions of stars that orbit, or revolve, around it

• A star and all planets and moons that orbit, or revolve, around it

• A star and all planets and other objects that orbit, or revolve, around it

Which of the following describes a moon?

• It revolves around a planet and is made of rock.

• It revolves around a star, and it has a tail of gas and dust.

• It revolves around the sun and is made of gases.

• It rotates around its axis and is made of gas and dust.

How are stars and comets different?

• A star has a solid rock and gas surface, while a comet has tail of dust and gas.

• A star has a tail of dust and gas, while a comet has a solid rock surface.

• A star is made up of burning gases, while a comet is made up of ice, gases, rocks, and dust.

• A star is made up of ice, rocks, and dust, while a comet is made up of burning gases.

How are a moon and an asteroid different?

• A moon revolves around an asteroid, while an asteroid rotates around its axis.

• A moon revolves around a planet, while an asteroid revolves around a star.

• A moon revolves around a star, while an asteroid rotates around its axis.

• A moon rotates around its axis, while an asteroid revolves around a planet.