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Universe Vocabulary

Practice Universe Vocabulary

GalaxyHuge collection of stars that is very far away
StarBall of Gas that gives off its own light
UniverseThe space that holds the Earth, the solar system, the galaxies, and all matter and energy
MatterAnything that takes up space and has mass
ExpandTo get bigger
WaveA vibration that carries energy
WavelengthThe distance between 2 peaks of a wave
AmplitudeThe distance from the middle of a wave to the top of its peak
FrequencyThe number of wave cycles that happen per second
ReflectionThe turning back of a wave when it hits something
RefractionThe bending of a wave when it passes through something

8th Grade Science Instructor
Thoreau Middle School

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