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What are astroids? Small,solid,rocky bodies that orbit close to the Sun.
What are the giant gases? The four largest planets-Jupiter, Saturn, Uranus, and Neptune- that are made mainly of hydrogen, helium, and other gases.
What is tectonics? The processes of change in a crust as a result of the motion of hot material underneath.
What is a meteor? When a particle enters Earth's upper atmosphere and the particle and the air around it become hot enough to glow in a brief streak of light.
What is a meteorite? A space object that passes through Earth's atmosphere and reaches Earth's surface.
What is one astronomical unit? Earth's average distance from the sun.
What is a comet? A small, icy object that produces a coma when it gets close to the sun.
What is volcanism? A process that moves molten rock from a planet's interior onto its surface.
What is an ellipse? The shape of the planet's orbits in our solar system.
What are the terrestrial planets? The closest planets to the Sun-Mercury, Venus, Earth, and Mars- that all have rocky crusts and dense mantles and cores.
What is a ring? A wide, flat zone of small particles around a planet's equator.
Created by: jenn026lk