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Rotate or Revolve?
Seasons
Moon Phases
Tides
Eclipses
100
Spinning in place.
What is rotation?
100
The tilted axis.
What is the reason for the seasons?
100
Eight per month.
What is the number of moon phases?
100
Small changes in tides.
What is a neap tide.
100
The Earth's shadow on the Moon
What is a lunar eclipse?
200
One object moving around another object.
What is revolution?
200
The days when the hours of light is the same all over Earth.
What are the equinoxes?
200
The moon is between the Earth and the Sun.
What is a New Moon?
200
Large changes in tides.
What is a spring tide.
200
The moon blocks out the Sun's light.
What is a solar eclipse?
300
The Earth does this once every 24 hours.
What is rotates on its axis?
300
The days when the hours of light and dark are longest or shortest.
What are solstices?
300
May cause behaviors of some organisms to change.
What is a full moon?
300
The gravity of the moon.
What is the main cause of the tides?
300
The lighter shadow of an eclipse.
What is the penumbra?
400
The amount of time for Earth to revolve around the sun.
What is one year or 365.25 days?
400
December 21 or 22 in the Northern Hemisphere.
What is the date of the Winter Solstice?
400
Time for one revolution of moon around Earth.
What is one month?
400
Full or New Moon phases.
What are the moon phases that cause spring tides?
400
The darker shadow of an eclipse.
What is the umbra?
500
365.25 days per year add up to one every 4 years.
What is a leap year?
500
16 hours of daylight.
What is the hours of daylight in Oregon during the summer solstice?
500
The last visible phase of the moon.
What is a waning crescent?
500
Tides caused by waxing crescent or waning gibbous moon.
What is Spring to Neap?
500
The reason eclipses do not happen very often.
What is the ecliptic plane, the moon rarely aligns.