Space

The Big Bang Theory is based on...

• Evidence that the universe is constantly shrinking

• Evidence that the universe is constantly contracting

• Evidence that the universe is constantly expanding

• Evidence that the universal quantum theory is correct

Meteoroids are

• small chunks of rock and iron that burn up in Earth's atmosphere as they become meteors.

• small chunks of ice and gas that burn up in Earth's atmosphere as they become asteroids.

• giants chunks of gas and minerals that condense and then ignite to become stars.

• giant chunks of rock and minerals that collect gas and dust to become planets.

The surface of Mars has many craters. This feature provides evidence of which phenomenon that occurred during the formation of the solar

system?

• nuclear fusion

• meteoroid impacts

• solar flare activity

• tectonic plate movements

What is one difference between comets and the Moon?

• The Moon has a core of ice, while comet cores are solid rock.

• Comets have large orbits around the Sun, while the Moon orbits Earth.

• The Moon reflects light from the Sun, while comets generate their own light.

• The Moon has a large orbit around the Sun, while comets orbit Earth.

A comet is...

• smaller than an asteroid.

• the smallest space object.

• a very common thing to see.

• made of ice, rock and gases.

What do small meteoroids look like when entering the atmosphere of Earth?

• asteroids

• shooting stars

• spaceship

• Northern Lights

The solar system has planets, moons, comets, meteoroids, and asteroids. What is one thing all of these objects have in common?

• They are held in orbit by the Sun's gravity.

• They are all closer to the Sun than Uranus.

• They are all spherical.

• They are all solid.

What force is strong enough to pull asteroids out of the asteroid belt?

• the gravitational force of Mars

• the thermal energy of Mars

• the gravitational force of Jupiter

• the electromagnetic force of the Sun

Why is the asteroid belt located in the space between Mars and Jupiter?

• This space is where the pull of gravity from the Sun and from Jupiter are equal.

• The asteroids use to be a planet, but the planet exploded in a collision billions of years ago.

• The asteroids are in this space because Jupiter has more gravitational pull than the Sun.

• The space has room for another planet, and the asteroids are slowly forming into a new planet.

Scientists track an icy object with an orbit that ranges from the Kuiper Belt to a path between Earth and Sun. How would this object BEST be classified?

• an asteroid

• a comet

• a meteor

• a star