A group of stars, star systems, star clusters, dust, and gases held together by gravity.
What is a galaxy.
100
The number of planets in the solar system.
What is nine.
100
This is where the asteroid belt is located.
What is between Mars and Jupiter.
100
The force that attracts all objects toward one another.
What is gravity.
100
This is the main thing that causes the seasons.
What is the Earth's tilt.
200
The color of the hottest stars.
What is blue.
200
Pluto is no longer considered a planet, it is now considered to be this kind of solar system object.
What is a dwarf planet.
200
A piece of rock that orbits the sun but is not large enough to be a planet and shares its orbit with many other objects. There are about 7,000 of them in the solar system.
What is an asteroid.
200
The tendency of an object at rest to stay at rest and an object in motion to stay in motion unless acted upon by an outside force.
What is inertia.
200
When the Earth is neither tilted toward nor away from the sun, the hemispheres are in one of these two seasons.
What fall or spring.
300
Massive stars end up as one of these two things at the end of their lives.
What are black holes or neutron stars.
300
This is the cloud of comets and dust that surrounds the solar system.
What is the Oort Cloud.
300
The materials that make up a comet.
What are rock, ice, and dust.
300
The two forces that work together to keep the planets in orbit around the sun.
What is inertia.
300
When the moon is between the Earth and the sun and casts a shadow on the Earth.
What is a solar eclipse.
400
Stars start as clouds of dust and gas known as these.
What are nebulas.
400
The planets in order from closest to the sun to farthest from the sun.
What is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
400
This is the name for a collection of space rocks and dust that have entered the Earth's atmosphere.
What is a meteorite.
400
The indentations on the surface of the moon that are thought to have been caused by objects striking the moon.
What are craters.
400
When the Earth is between the moon and the sun and casts a shadow on the moon.
What is a lunar eclipse.
500
The three major kinds of galaxies.
What are elliptical, spiral, and irregular.
500
The distance between the sun and the Earth.
What is one Astronomical Unit (AU).
500
These are the two places in the solar system where comets come from?
What are the Oort Cloud and the Kuiper Belt.
500
The tides are highest during these phases of the moon.
What are the new moon and the full moon.
500
The name of the lighter part of the shadow cast on the sun or the moon during an eclipse.