Space

Beth's teacher asked her to describe a galaxy. Which of the following is the best description of a galaxy?

• all matter that exists in space

• a star and a moon

• a group of stars, gas, and dust including planets that orbit the sun

• a group of stars in a set pattern

A small chunk of rock passing through the Earth's atmosphere is a __________.

• asteroid

• meteor

• meteorite

• comet

A meteoroid that reaches the surface of the Earth is a ________________.

• meteorite

• meteor

• asteroid

• comet

Chunks of ice, dust, and rock that have stretched out orbits around the sun is called a ____________.

• meteor

• asteroid

• meteoroid

• comet

Hot stars are usually what color?

• red

• purple

• blue

• yellow

Cold stars are what color?

• red

• green

• blue

• orange

What happens as a planet rotates on its axis?

• its distance from the sun decreases

• it gets farther away from its moons

• The surface that faces the sun changes

• its distance from the sun increases

Pluto is now classified as a dwarf planet. Which of these properties explains why it is classified as a dwarf planet?

• It does not orbit the sun

• it is too far from Earth

• It is too small to be a planet

• It has other bodies in its orbit

What is most likely found between Mars and Jupiter?

• stars

• comets

• Asteroids

• dwarf planets

Earth turning on its axis is called ____________.

• revolution

• seasons

• swaying

• rotation