This is the name of Earth's motion around the Sun.
What is revolution?
100
This is the visible layer of the Sun.
What is the photosphere?
100
This is the name of our galaxy.
What is the Milky Way?
100
Earth's seasons are caused by this condition.
What is the tilt of the Earth's axis?
100
This is the point between two objects where they balance each other.
What is the barycenter?
200
This is the angle of tilt in the Earth's axis.
What is 23.5 degrees?
200
This is the source of the Sun's energy.
What is nuclear fusion?
200
This is hypothesis that all objects in the universe came together from great clouds of atoms and energy.
What is the Nebular Hypothesis?
200
This occurs when the Moon comes between the Earth and the Sun.
What is a solar eclipse?
200
This word means "closest to the Sun"
What is perihelion?
300
This is the wobbling of the Earth's axis over a period of 26,000 years which has no effect on the seasons.
What is precession?
300
This is how far the Earth is from the Sun.
What is 1AU?
300
This the the correct order of the following things in the universe from largest to smallest: Galaxy, star, galaxy cluster, planet
What is galaxy cluster, galaxy, star, planet?
300
This occurs every December 21 and is recognized as the first day of winter.
What is the Winter Solstice?
300
This is the term for the moon's phases when it is going from a new moon to a full moon.
What is waxing?
400
This is the relatively quick oscillation of the Earth's axis which does have an effect on the seasons.
What is nutation?
400
This is a sudden temporary outburst of energy from the Sun's surface.
What is a solar flare?
400
This is the colorful term for how scientists know the universe is expanding.
What is red-shift?
400
This field protects the Earth from the harmful effects of solar radiation.
What is Earth's magnetic fifeld?
500
This is the cause of Earth having a 24 hour day.
What is rotation?
500
This is a stream of charged particles continuously emitted from the Sun which travels through space and can interfere with communications here on Earth.
What is solar wind?
500
This states that the farther away an object is, the faster it is moving.
What is Hubble's Law?
500
The tilt of the Earth affects this, which is why we have seasons.
What is the angle sunlight hits the Earth?
500
This is how energy flows from the Sun to the Earth through space.