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Unit 8
6th Grade Unit 8- Solar System and Beyond
| Question | Answer |
|---|---|
| Asteroid | A small, rocky object that orbits the Sun, mostly found in space between Mars and Jupiter. |
| Asteroid Belt | A big area in space between Mars and Jupiter where many asteroids are found. |
| Astronomical unit | A unit of space distance that equals the space between Earth and the Sun. |
| Atmosphere | The layer of gases around a planet that we breathe and that protects us. |
| Big Bang Theory | The idea that the universe started from a tiny point and has been expanding ever since. |
| Coma | The fuzzy cloud of gas and dust around the center of a comet. |
| Comet | A space object made of ice, rock, and dust that grows a tail when it gets close to the Sun. |
| Elliptical Galaxy | A galaxy shaped like a round or stretched-out ball with mostly old stars. |
| Elliptical orbit | A path around something (like the Sun) that is shaped like an oval, not a circle. |
| Gaseous Planets | Big planets made mostly of gas, like Jupiter and Saturn. |
| Galaxy | A huge group of stars, gas, dust, and planets all held together by gravity. |
| Geocentric | A model where Earth is in the center of the universe and everything moves around it. |
| Gravity | A force that pulls things toward each other – like how we stay on the ground. |
| Heliocentric | A model where the Sun is in the center of the solar system and the planets move around it. |
| Inertia | The idea that things want to keep doing what they’re doing unless something changes it. |
| Irregular Galaxy | A galaxy with no clear shape – it looks messy or uneven. |
| Kuiper Belt | A region of space past Neptune filled with icy objects and dwarf planets. |
| Meteor | A space rock that burns up in Earth’s atmosphere – also called a "shooting star." |
| Meteorite | A meteor that survives falling through the atmosphere and lands on Earth. |
| Meteoroid | A small rock or chunk of metal in space, smaller than an asteroid. |
| Milky Way | The galaxy where our solar system lives – it’s shaped like a spiral. |
| Nucleus | The solid center of a comet, made of ice, rock, and dust. |
| Oort Cloud | A huge cloud of icy objects far beyond the planets – where comets come from. |
| Planet | A large object in space that orbits a star and is round. |
| Satellite | Something that orbits a planet – it can be natural like a moon or made by humans. |
| Solar System | The Sun and everything that moves around it, like planets, moons, and comets. |
| Spiral Galaxy | A galaxy that looks like a pinwheel with arms that spin out from the center. |
| Tail | The bright, glowing part of a comet that points away from the Sun. |
| Terrestrial planets | Small, rocky planets like Earth, Mars, Venus, and Mercury. |
| Universe | Everything that exists – all the stars, planets, galaxies, and space itself. |
Created by:
PGM 7 SCI
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