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Science Vocab - Ch 8
The Universe
Question | Answer |
---|---|
the tendency of a moving object to keep moving in a straight line or of any object to resist a change in motion | inertia |
one complete trip around the sun...happens every 365 days | revolution |
the regular rise and fall of the water level along a shoreline | tide |
a natural or artificial object in space that circles around another object | star |
a collection of billions of stars | galaxy |
the force of attraction between any two objects due to their mass | gravity |
the path one object travels around another object | orbit |
a complete spin on an axis | rotation |
the appearance of the sha[e of the moon at a particular time | phase |
a situation that occurs when the sun, earth a moon are in a straight line earth's shadow falls across the moon | lunar eclispe |
an instrument that makes distant objects appear closer and larger | telescope |
a large object that orbits a star and does not produce its own light | planet |
a natual object that orbits a planet | moon |
a mixture of ice, frozen gasses, rock and dust left over from the formation of the solar system | comet |
one of many small, rocky objects between Mars and Jupiter | asteroid |
a huge cloud of gas and dust in space that is the first stage of star formation | nebula |
a star that can no longer turn helium into carbon; it cools and shrinks becoming very small and dense | white dwarf |
a star that has produced more energy than gravity can hold together and explodes | supernova |
an object whose gravity is so strong that light cannon escape it | black hole |
any of the patterns formed by groups of stars in the sky. To people in the pasat, these patterns looked like pictures of animals and people | constellation |
the distance light travels in a year | light year |