Keller - 3rd Earth, Sun, Moon Cycles Flashcards
The earth ___________ on its axis and orbit the sun.
rotates
An ________ is an imaginary straight line around the Earth rotates.
axis
The axis goes from ________ pole to the ________ pole.
North, South
The earth’s __________ causes day and night.
rotation
What is rotation?
The spinning of an object on its axis.
It takes the earth ____________ to make one rotation.
one day or 24 hours
The earth revolves around the _______.
sun
What causes the seasons?
The tilt of the earth on its axis
How long does it take the earth to make one revolution around the sun.
365 1/4 days
The ________ of the moon are different shapes the moon seems to have in the night sky.
phases
The moon repeats phases how often?
Once a month
What is the cause of the phases of the moon?
positions of the sun, earth, and moon
No matter what phase the moon is in, _____ of it is ALWAYS lit by the sun.
HALF (the half that is facing the sun is always lit)
Why does we see lunar phases?
As the moon moves in its orbit, different positions of it appear to be lit up as we look at it from earth.
The moon creates ______ and ______ tides on earth.
high and low
When the ocean moves away from the land, it is _______ tide.
low
When the ocean moves towards the land, it is _______ tide.
high
What does a new moon look like?
explain or draw
What does a crescent moon look like?
explain or draw
What does a quarter moon look like?
explain or draw
What does a gibbous moon look like?
explain or draw
We don’t feel the earth moving but it is never still. It is always moving in ______ way.
two
The earth _________ around which is what causes day and night.
rotates (or spins)
How long does one rotation of the earth take?
24 hours or one day
The sun shines on the earth as it spins but sunlight is only shining on the side of the earth facing the sun - this side is _______.
day
The dark side is _______.
night
As the earth rotates, we move from ______ to _______ over and over again.
day to night
What is it called when the earth travels around the sun?
orbit
How long does it take the earth to orbit the sun?
about one year or 365 days
As the earth moves around the sun, the ________ change.
seasons
What causes the seasons?
the tilt of the earth
Different parts of the earth get more or less sunlight at different times of the year. An area gets more sunlight in the __________ and less in the ____________.
summer; winter
The poles are ________ straight up and down. The earth is _________.
NOT; tilted
If the northern side of the earth is tilted toward the sun, it is _________ there.
summer
If the northern side of the earth is tilted way from the sun, it is ________.
winter
