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Solar System Unit Key Vocabulary

Background source: 1Wyrmshadow1 website Asteroids – Irregular large pieces of rock that move through space; found between Mars and Jupiter. Comets – Objects made up of ices, dust, and gases that orbit the sun in a large, elliptical orbit; a “dirty snowball.” Distance – A measure of the amount of space between objects.

Gravity – The attraction of one mass to another. Inference – A conclusion reached on the basis of evidence and reasoning. Mass – The amount of matter in something. Meteor – The streak of light produced by a small piece of matter in space that is visible when it falls into Earth’s atmosphere.

Meteoroid – The small piece of matter when it is in space. Meteorite – A meteor that falls to the surface before burning up in the atmosphere. Planet – A celestial object, larger than asteroids or comets that revolve around a star without giving off its own light.

Satellite – A natural or man-made object that revolves around larger objects in space. Scale – Objects compared to a standard for accurate size perception. Solar System – The the system made up of the eight unique planets, and many smaller objects that orbit the Sun.

Background source: 1Wyrmshadow1 website Stars – Celestial objects that consist of gases, which are so massive that fusion within their cores generate light and heat. Sun – The star in our Solar System that sustains most life on Earth and is the primary source of heat and light. Telescope – An instrument that gathers light and magnifies, or makes distant objects appear larger.

Background source: 1Wyrmshadow1 website Rotation – When a planet or moon turns all the way around or spins on its axis one time. Click Here for Rotation Video Source: Mrs. Pardington's Class Wiki Page

Background source: 1Wyrmshadow1 website Revolution – The circling of one object around another object in space. A planet revolves around the sun. A moon revolves around a planet. Click here for revolution video.

Background source: 1Wyrmshadow1 website Inner Rocky Planets Mercury Venus EarthMars NASA Hubblesite ESA

Background source: 1Wyrmshadow1 website Inner Rocky Planets Planets are made of rocky material. Planets are the nearest to the Sun. Planets are from 3,000 to 8,000 miles in diameter. Planet “day” last from 24 hours to 245 days. Planet “year” last from 88 days to 2 years.

Outer Gas Giant Planets Jupiter Saturn UranusNeptune NASA Hubblesite NASA

Background source: 1Wyrmshadow1 website Outer Gas Giants Planets are made of gaseous material. Planets are the farthest from the Sun. Planets are from 31,000 to 87,000 miles in diameter. Planet “day” last from 10 hours to 17 hours. Planet “year” last from 12 years to 165 years.

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