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Chapter 10

Planets and Other Objects In Space

The planets outside the asteroid belt are the __________ ______________. outer planets
The earth's path around the sun is its ___________. orbit
The __________ is an imaginary line that runs through both poles of the earth. axis
A _______ is a small planet-like body that orbits a planet. moon
A _______ is a huge ball of super heated gas. star
The star at the center of our solar system is the ______. sun
A ___________ is a large object that orbits a star. planet
The different shapes of the moon are called the____________. phases
A large system of stars, gas, and dust is called a ____________. galaxy
Everything that exists in space is the _____________. universe
How long does it take earth to rotate on its axis once? 24 hours - 1 day
What is the source of all energy in the solar system? sun
About how long is a full cycle of the moon? about 28 days (29 1/2 days) or 4 weeks
What is the phase of the moon where the whole moon is dark from the earth? new moon
About how long is a half cycle of the moon? about 14 days or 2 weeks
Planets between the sun and the asteroid belt are the ___________ _____________. inner planets
How long does it take the earth to revolve around the sun once? 365 days or 1 year
What is the phase of the moon where the whole moon is visible from earth? full moon
Why is Mars called the red planet? It looks fiery red from earth.
What 2 gases make up most of the sun? hydrogen and helium
Name the 2 reasons the seasons change. earth's tilt and its orbit around the sun
Name the 4 inner planets. Mercury, Venus, Earth, and Mars
Name the 4 outer planets. Jupiter, Saturn, Uranus, and Neptune
What planet is a dwarf planet? Pluto
What color of star is the coolest? Red
What color of star is the hottest? Blue
What color of star is a medium temperature? Yellow
What causes parts of the U.S. to be warmer than other areas in the summer? The warmer areas are closer to the equator.
Can people in the northern hemisphere see the same constellations as people in the southern hemisphere? Why or why not? No. They are facing different parts of space.
Why does the calendar have 366 days every 4 years instead of the normal 365 days? Each year is really 365 1/4 days long, so we add en extra day every 4 years to make up for the extra hours.
What do we call the year that has the extra day? Leap year
Why do the positions of the constellations seem to change in the night sky? Earth is orbiting the sun so we see different parts of the night sky at different times of the year.
Created by: Mrs. Furlong