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5th Grade

Objects in the Sky

atmosphere The protective layer of gases that surrounds earth.
axis An imaginary line that the Earth rotates on.
corona The sun's atmosphere which can only be seen during a solar eclipse.
eclipse The passing of one object through the shadow of another.
force A push or pull that causes an object to move, stop, or change direction.
galaxy A group of stars, gas, dust, and planets.
gravity The force that pulls all objects towards each other.
orbit The path an object in space travels as it revolves around another object.
revolve To travel in a closed path around an object.
rotate The spinning of Earth on its axis.
satellite a natural or artificial object that orbits around another object.
solar flare A brief burst of energy that radiates from the sun's photosphere.
solar wind A fast moving stream of particles thrown into space by solar flares.
sunspot A dark spot on the photosphere of the sun that is cooler than the surrounding area.
telescope An instrument that magnifies distant objects, such as the moon and stars.
tide The cyclical rise and fall of the level of the ocean that is caused by gravitational pull.
weight A measure of the pull of gravity on an object.
solar eclipse Occurs when the moon is between the sun and the Earth.
lunar eclipse Occurs when the Earth is between the sun and the moon.
crater A bowl-shaped depression on the surface of an object.
waxing When the moon's phases appear to be growing.
waning When the moon's phases appear to be getting smaller
new moon The lunar phase that occurs when the moon is between the sun and the Earth.
full moon The lunar phase that occurs when the Earth is between the sun and moon.
photosphere The "sphere of light" that makes up the surface of the sun.
asteroid A large rock made up of ice and metal that orbits the sun; sometimes called a "minor planet".
comet A large chunk of ice and dust which follows a long, narrow orbit around the sun.
meteoroid A small space rock that orbits the sun.
meteor Sometimes called "shooting stars" because they have a streak of light that burns behind them.
meteorite A small space rock that has landed on Earth's surface.
Created by: lcdwinal