Earth's Moon
How long is earth's rotation?
24 hours
In a heliocentric system, Earth revolves around ______.
the Sun
The asteroid belt is located ______.
between Mars and Jupiter
The Milky Way galaxy is an example of a _________.
spiral galaxy
The space race was between ______.
the United States and the Soviet Union
Galileo saw that much of the moon’s surface is covered with round pits called ______.
craters
Most galaxies are moving away from each other, which means the universe is_________
expanding
What do all of the inner planets have in common?
They all are small and have rocky surfaces.
A supernova is the explosion of a dying ______.
high-mass star
At the end of a mission, a shuttle can return to Earth and land like an _______________________________.
airplane
The phase of the moon you see depends on ______.
how much of the sunlit side of the moon faces Earth.
What is a geocentric model and who first used it?
solar system revolves around the earth
the Greeks were the first to use it
Saturn’s rings are made up mostly of ______.
chunks of ice and rock
The lifetime of a star depends on its ______.
mass
The space shuttle ______.
a. can only be used once.
b. can be used many times to carry astronauts into orbit.
c. is an unscrewed space probe.
d. carried astronauts to the moon.
b. can be used many times to carry astronauts into orbit.
When the north end of Earth’s axis is tilted toward the sun, North America will experience ______
more direct rays and longer days.
What is a comet made of and what is the shape of its orbit around the sun?
Made of gas, dust, and ice
Has an oval-shaped orbit around the sun
Meteoroids usually come from ______.
comets or asteroids
Characteristics used to classify stars include ______.
size, brightness, and temperature.
Which event began the space race?
The Soviet Union launched Sputnik I
For a solar eclipse to occur, ______.
the moon must be directly between Earth and the sun.
Compare and contrast a planet and a dwarf planet.
Compare - both orbit the sun
Difference - dwarf planet does not have more mass than the objects in near by orbit
Uranus is different from most other planets because it ______.
rotates on its side
A star is ______when nuclear fusion starts.
born
Both reflecting and refracting telescopes are designed to ______.
gather and focus visible light