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19 Cards in this Set

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  • Back
comet
a small mass of dust and ice that orbits the sun in a long oval shaped pass
star
a hugh burning sphere of gas (for example, the sun)
trace fossil
a fossil that shows changes that long dead animals made in their surroundings
mold
a fossil imprint made by the outside of dead plant or animal
cast
a fossil formed when sediments or minerals fill a mold - it takes on the same outside shape as the living thing that shaped the mold
astroids
a small rocky object that moves around the sun
inner planets
the planets closest to the sun - mercury, venus, earth, mars
orbit
the path that an object such as a planet makes as it revolves around a second object
solar system
a group of objects in space that move around a central star
space probe
a space vehicle that carries cameras, instruments, and other research tools
planet
a large object that moves around a star
outer planets
the planets farthest from the sun - jupiter, saturn, uranus, neptune and pluo
gas giants
the planets jupiter, saturn, uranus, and neptune -- which are large spheres made up mostly of gasses
constellation
the pattern formed by a group of stars in the sky
telescope
a device people use to observe distant objects with their eyes
axis
an imaginary line which runs through both poles of a planet
moon
a natural satellite that moves around a planet
imprint
the impression that is left on a soft surface when something is pressed down into it
space stations
a station in orbit in space where astronauts and scientists work doing experiments to see how space affects things and people