Ch 1-1
Why do we have day and night?
Earth’s rotation on its axis
From new moon phase to full moon phase you see what?
an increasing amount of the lighted side of the moon
What phase comes after the first quarter?
waxing gibbous
Write the period of revolution for Neprtune to the hundredths place:
164.8 years
Which event occurs every 365 ¼ days?
One complete revolution around the sun or one year
One complete revolution of Earth around the sun takes how long?
365 ¼ days, one year
The approximate time between one full moon and the next full moon is?
One month
What phase comes after the waxing gibbous?
full moon
What is Jupiter’s period of rotation at the Equator?
9 h 50 min 30 s
When the north end of Earth’s axis is tilted toward the sun, South America will experience what?
winter
Why does Earth have seasons?
Earth’s tilted axis
Why can the moon be seen from Earth?
Because the sun reflects off of the moon
What phase comes after the new moon?
waxing crescent
What is the period of rotation at the Equator for Venus?
243d
Earth’s rotation takes about how long?
a day, 24 hours
What occurs when the sun is directly overhead at 23.5 degrees north or south?
solstice
The phase of the moon you see depends on what?
How much of the sunlit side of the moon faces Earth
What phase comes after the waning gibbous?
third quarter
Which celestial object in the solar system has the lowest density?
Saturn
Explain a solar eclipse.
Occurs when the moon passes between Earth and the sun, blocking the sunlight from reaching Earth
What is an equinox?
A time when the noon sun is directly overhead at the equator
Because the moon rotates once for each revolution around Earth, what happens?
you never see the far side of the moon
What phase comes before the new moon?
waning crescent
Which celestial object has an Equatorial Diameter most similar to Mercury’s?
Earth's Moon
Explain tides.
The rise and fall of water, every 12.5 hours or so,- they occur mainly because of the differences in how much the moon pulls on different parts of Earth