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Terms and definitions

Everything in this flashcard set.

Mass
How much matter something contains
Volume
How loud something is, or how much space it fills
Radius
The length of a line segment between the center and circumference of a circle or sphere
Density
How tightly packed the matter in something is
Gravity
Force that pulls objects toward the Earth
Velocity
Distance travelled per unit time
Magnitude
The property of relative size or extent
Temperature
How hot or cold something is
Satellite
Any celestial body orbiting around a planet or star
Inertia
The tendency of a body to maintain its state of rest or uniform motion unless acted upon by
Moon
Natural satellite that orbits the Earth
Galaxy
A collection of star systems
Clouds
Any collection of particles or gases that is visible (plural)
Universe
Everything that exists anywhere
Orbit
The path described by one celestial body in its revolution about another

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