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Planets Quiz 1

Astronomy Quiz 1

TermDefinition
Ellipse Shape of the planets orbit.
Rotate Turn on axis. One day.
Revolve To orbit. One year.
Terrestrial planet Planets with solid hard surface.
Gas planet Planets made of gas.
Sun The only star in our solar system.
Mercury Lots of craters. No atmosphere.
Venus Hottest brightest planet. Day longer than year.
Earth Water planet.
Mars Red planet due to iron oxide in soil.
Jupiter Largest planet. Big Red Spot.
Saturn Planet with the most rings.
Uranus Axis tilted. Planet spins on its side.
Neptune Named after the God of the Sea.
Ptolemy Believed in a Earth centered solar system
Copernicus First to prove a sun centered solar system theory.
Geocentric Defined as Earth centered.
Heliocentric Defined as Sun centered.
Telescope Far seeing
Perihelion closest point in a planets orbit
Aphelion farthest point in a planets orbit
Gravitational Force The force that exists between the sun and the planets
Inertia An object that moves in a straight line until an outside force acts upon it.
Created by: gayle gavazzi
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