vocab 1
vocab 2
vocab 3
questions 4
questions 5
100
planet
a large, round object that revolves around a star and has cleared the region around its orbit
100
inner planet
any of the four closest planets to the sun
100
outer planet
any of the four planets in our solar system beyond Mars
100
besides Earth, what else moves around the sun?
other planets move around the sun
100
In what direction do stars, the moon, and the sun seem to move across the sky? why?
East to west, because Earth rotates from west to east
200
space probe
an explosive eruption of waves and particles into space
200
moon
a natural object that revolves around a planet
200
dwarf planet
a large, round object that revolves around the sun but has not cleared the region around its orbit
200
name two different types of stars
supergiants and giants
200
what is the outermost layer of the sun called?
the corona
300
constellation
a group of stars that forms a pattern
300
asteroid
a rocky mass up to several hundred kilometers wide that revolves around the sun
300
comet
a frozen mass of different types of ice and dust orbiting the sun
300
what causes a meteor shower?
Earth passes through the orbit of a comet. Loose pieces of the comet become meteors when they collide with Earth's atmosphere.
300
in what order does a meteoroid go from being a meteoroid to a meteorite?
meteoroid-meteor-meteorite
400
axis
an imaginary line around which an object spins
400
rotation
one whole spin of an object on its axis
400
solar flare
an explosive eruption of waves and particles into space
400
what would happen to the seasons of the world if Earth's axis tilted in the opposite direction?
the seasons would be reversed. the Northern Hemisphere would receive the most hours of sunlight and most direct sunlight in December instead of June.
400
why do more asteroids not hit Earth?
Jupiter's gravity holds most asteroids in an area beyond Mars in the asteroid belt.
500
orbit
the path an object takes as it revolves around a star, planet, or moon
500
revolution
one full orbit around the sun
500
sun spots
dark spots that move on the face of the sun
500
what effect does Neptune's position in the solar system have on its temperature?
Neptune's temperature is very cold because it is so far from the sun that it receives less of the sun's heat than Earth.
500
what is unusual about Pluto's orbit?
Pluto's orbit is tilted
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