2. Day and Night
Caused by the spin of the Earth on its axis
Takes about 24 hours for the Earth to make
one rotation
3. Weeks
7 days for the…
7 non star visible objects in the sky
Although not all connections are obvious in
English!
Day Object
Sunday Sun
Monday Moon
Tuesday Mars
Wednesday Mercury
Thursday Jupiter
Friday Venus
Saturday Saturn
4. Months
Month sounds like moon!
Even though the moon takes about 29.5 days
to revolve around the Earth and our months
are usually 30-31 days, we based months off
of the moon!
5. Years
Years are based on how long it takes the
Earth to make one complete orbit around the
sun
It takes the Earth 365.2422 days to orbit the
sun
Because of that, we have leap year every four
years
On years that end in a 00, it must also be
divisible by 400 to be a leap year (1900 was
not a leap year but 2000 was).
6. Years
Years are based on how long it takes the
Earth to make one complete orbit around the
sun
It takes the Earth 365.2422 days to orbit the
sun
Because of that, we have leap year every four
years
On years that end in a 00, it must also be
divisible by 400 to be a leap year (1900 was
not a leap year but 2000 was).