The difference between a heliocentric model and a geocentric model of the solar system
What is the heliocentric model is sun centered and the geocentric model is Earth centered
100
The difference between aphelion and perihelion
What is aphelion is the point in which a planet is farthest away to the sun and perihelion is the point in which a planet is closest to the sun
100
How does the sun make its energy
What is nuclear fusion
100
Name the four terrestrial from closest to farthest from the sun
What is Mercury, Venus, Earth, Mars
100
Name the four gas giant planets in order from closest to farthest away from the sun
What is Jupiter, Saturn, Uranus, Neptune
200
This person came up with the wheels on wheels theory
What is Ptolemy
200
Define planetesimal
What is a building block for a planet
200
Where the sun creates its energy
What is the core
200
This planet is similar to Earth in size and mass
What is Venus
200
This planet has density less than water
What is Saturn
300
This person observed Jupiter's moons
What is Galileo
300
Define protostellar disk
What is a flattened nebula disk
300
Define differential rotation
What is the rotation of a body in which different parts of a body have different periods of rotation
300
This planet has a large iron core
What is Mercury
300
This planet is almost tilted on its side
What is Uranus
400
This person attempted to measure the relative distances to the moon and sun
What is Aristotle
400
Define solar nebula
What is a cloud from which the solar system formed
400
The sun's outer atmosphere
What is corona
400
This planet has a title axis of 0 degrees
What is Mercury
400
This planet has the strongest winds in the solar system
What is Neptune
500
This Person found the planets orbit in ellipses
What is Kepler
500
Define all of Kepler's laws
What is 1. planetary orbits are ellipses
2. planets move faster when closer to the sun
3. compares the distance of a planet to the sun
to the time it takes to orbit
500
Occurs on average, of an 11-year cycle
What is sunspot activity
500
The distance from Mars to the sun
What is 1.52 AU
500
Name Jupiter's four largest moons ( the Galilean moons)