This is the force that keeps planets and moons from floating off into space.
What is gravity?
100
This is a large system of gases, dust, and billions of stars.
What is a galaxy?
100
This is a satellite that orbits a planet.
What is a moon?
100
This is the center of a solar system.
What is a sun?
100
This is the telescope that orbits Earth and takes pictures of space.
What is the Hubble Telescope?
200
The turning of a planet on its axis is called this, while the movement of a planet around a sun is called this.
What is rotation and revolution?
200
This is the sun and all of the planets, asteroids, comets, and meteors that orbit the sun.
What is a solar system?
200
These are bodies composed of ice and rock that orbit the sun, and are also known as "dirty snowballs".
What are comets?
200
The sun is primarily made up of these two elements.
What is hydrogen and helium?
200
Earth's axis has a tilt of this many degrees.
What is 23.5?
300
This is name for the pathway then moon takes around the Earth, or Earth takes around the sun.
What is orbit?
300
Jupiter's gravity holds this in place between Jupiter and Mars.
What is the asteroid belt?
300
These are the rocky planets.
What are Mercury, Venus, Earth, and Mars?
300
When the moon looks like it is getting bigger it is doing this, and when the moon looks like it is getting smaller it is doing this.
What is waxing and waning?
300
The Big Bang occurred this long ago, and our solar system formed this long ago.
What is 13.7 bya and 4.6 bya?
400
If the sun's gravity increased, this would happen to the Earth.
What is the Earth would fall into the sun?
400
DOUBLE JEOPARDY
These are the differences between meteoroids, meteors, and meteorites.
What is a meteoroid is a small piece of a comet or asteroid that is in outer space, a meteor is a meteoroid that is in the Earth's atmosphere (a shooting star), and a meteorite is a meteoroid/meteor that reaches Earth's surface.
400
The outer planets are mostly composed of gas, so they are called these.
What is the gas giants?
400
When more than half of the moon is lit, it is called this.
What is gibbous?
400
Our solar system formed when huge clouds of dust and gas were pulled together by gravity into a central mass, the mass started rotating and pulling in more matter, and these masses turned into the sun and planets. The theory is referred to as this.
What is the nebular theory?
500
As mass increases, this happens to gravity, and as distance increases, this happens to gravity.
What is increases and decreases?
500
This is the order of planets, starting near the sun.
What is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune?
500
This is what happened during the Big Bang.
What is all of the energy and matter in the universe was concentrated into a tiny point and the point exploded?
500
Nuclear fusion occurs when this happens.
What is 4 hydrogen atoms fuse to become a helium atom and this releases energy as a photon?
500
The Big Splash theory refers to this.
What is a Mars-sized body hit Earth and created a ton of debris, which eventually stuck together and created our moon?