Earth revolves around the sun. How long does it take for earth to complete one revolution?
one week
one day
one month
one year
Earth is tilted on its axis. Which of these would not exist if earth had no tilt?
lunar phases
seasons
earth's rotation
gravity
In the 1500s, which astronomer developed the sun-centered model of the universe?
Kopler
Galileo
Ptolemy
Copernicus
The same side of the moon always faces earth. Why is this?
the moon does not rotate as earth does
half the moon faces the sun
its rotation and orbit take the same amount of time
earth blocks part of the sunlight
When you look at the moon, it seems to change & look different every week. Why?
the same side of the sun always faces earth
the moon moves between earth & the sun
the lighted part that faces earth changes
the moon rotates once in about a month
The sun is at the center of our solar system. What are the largest objects that revolve around the sun?
planets
asteroids
comets
moons
A thick atmosphere surrounds one of the planets and makes its rocky surface the hottest in the solar system. Which planet?
Jupiter
Neptune
Saturn
Venus
The inner and outer planets can be grouped according to their characteristics. Which does NOT apply to the outer planets?
Very cold temperatures
largest planets in the solar system
gases surrounding an outer core
densest planet
Inner planets and outer planets have different structures. Which characteristic do all inner planets share?
surface of frozen gases
small solid core
large solid core
surface of mostly liquid water
There are several types of galaxies. How do scientists classify galaxies?
by temp
by shape
by size
by number of stars
Stars come in many different colors. Which characteristic determines the color of the star?
brightness
size and shape
distance from earth
temperature
In what ways are stars different from planets? Which facts are true?
planets shine by reflected light, stars have light
stars are much larger than planets
stars burn hydrogen, planets do not
all answers are correct
The sun is a medium sized star, but it appears much larger than the other stars. WhY?
the sun is hotter than other stars
the sun is closer to earth
The sun produces more light than other stars
earth's gravity has more affect on the sun
A large body that revolves around the sun.
comet
moon
planet
asteroid
small pieces of rock that orbit around the sun
meteor
asteroids
star
comet
To circle around a center point
axis
tilt
rotate
gravity
