6th Grade Science Final Study Guide - Vocabulary Definitions

Define: Scale Model.

• A scale model is an exact replica of the object.
• A scale model is a digital representation of an object.
• A scale model is a full-sized version of the object.
•  a smaller or larger version of something real, like a building or car, where all the parts are the right size compared to each other. It helps us see what the real thing looks like without being the full size

Define: Solar system.

• A gravitationally bound system consisting of a star/sun and the objects that orbit it.

• A group of galaxies held together by gravity.

• A collection of comets and asteroids only.

• A single planet and its moons.

Tags

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Define: Planet.

• An astronomical body that orbits a star, is big enough to have enough gravity to force a spherical shape, and is big enough that its gravity has cleared away any objects of a similar size near its orbit.

• A small rocky object that orbits the Sun, mostly found between Mars and Jupiter.

• A celestial body that produces its own light and heat through nuclear fusion.

• A natural satellite that orbits a planet.

Define: Gravity.

• An attractive force between two masses by which a planet or other body draws objects toward its center.

• A force that repels objects away from the Earth.

• A type of energy produced by moving objects.

• A chemical reaction between air and water.

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Define: Habitable zone.

• The orbital region around a star in which an Earth-like planet can possess liquid water on its surface and possibly support life.

• A region in space where no planets can exist due to strong radiation.

• The area around a planet where its gravity is the strongest.

• A zone in a galaxy where stars are most densely packed.

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Define: Asteroid belt.

• A region in the solar system roughly located between the orbits of the planets Jupiter and Mars that contains millions of irregularly shaped pieces of rock (called asteroids) as well as ice and dust.

• A ring of gas surrounding the Sun.

• A group of comets orbiting between Earth and Venus.

• A layer of atmosphere found on Jupiter.

Define: Kuiper belt.

• A large region in the solar system past Neptune where Pluto and other dwarf planets orbit the Sun along with rocks, dust, and ice.

• A belt of asteroids located between Earth and Mars.

• A region of the Sun where solar flares originate.

• A ring of gas surrounding Jupiter.

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Fill in the blank: A huge collection of gas, dust, and billions of stars and their solar systems held together by gravity is called a _________.

• Galaxy

• Comet

• Asteroid

• Nebula

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Fill in the blank: All of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy, is called the _________.

• Universe

• Solar System

• Milky Way

• Black Hole

Fill in the blank: The amount of matter that makes up an object is called _________. Mass does not change based on where you are.

• Mass

• Weight

• Volume

• Density