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100
planetary system
What is a system of planets revolving around a star?
100
heliocentric model
What is the geocentric and the heliocentric models of the solar system, and which is correct?
100
asteroid
What is a chunk of rock and metal that orbits the sun?
100
no axial tilts
What is the reason Venus and Mars do not have seasons?
100
Earth is at the center of the solar system
What is what Ptolemy believed?
200
comet
What is a ball of ice, rock, and frozen gases that orbit the sun?
200
elliptical orbit
What is the two planetary orbits and which is correct?
200
astronomical unit
What is a measurement equal to the distance between the Earth and the sun?
200
no seasonal changes
What is the way Earth would be with no axial tilt?
200
Earth
What is the third planet from the sun?
300
axis
What is an imaginary line through Earth's center?
300
9 planets and 64 moons
What is the correct number of planets and moons according to our book?
300
revolution
What is the movement of one object in orbit around another object?
300
Earth's rotation and Earth's revolution
What is the length of day determined by and what is the length of year determined by?
300
meteorite
What is a meteoroid called that reaches Earth's surface?
400
ellipse
What is an oval path?
400
season
What is a period of year with a certain level of temperature and type of weather?
400
west to east
What is the direction does Earth rotate?
400
between Mars and Jupiter
What is the place where the asteroid belt is located?
500
phases
What is the different shapes the moon seems to have as viewed from Earth?
500
Copernicus believed circular orbits and Kepler believed elliptical orbits
What is what Copernicus and Kepler believed about the planets' orbits?
500
First Quarter
What is a phase in which half the moon's lit side is visible after the waxing crescent moon?
500
Shapes the moon appears to have when viewed from Earth
What is phases?
500
science rules
What is a phrase that means science is the best?