Unit 4: Revolution (Earth) pg. 124 - 125 Flashcards
It seems that the ___ moves around the Earth, but it actually doesn’t. The ___ is a ___ in the centre of our Solar System. The Earth moves around the ___ in an
____.
It seems that the SUN moves around the Earth, but it actually doesn’t. The SUN is a STAR in the centre of our Solar System. The Earth moves around the SUN in an ORBIT.
How long does it take the Earth to orbit the Sun?
365¼ days.
What is the 365¼ days referred as?
A year.
How is a year divided?
A year is divided into 12 months, which is divided into 4 seasons.
How come we have different seasons?
We have different seasons because the Earth receives different amounts of heat and light during the year. This is because the Earth’s orbit is not round.
What are seasons based on?
Seasons are based on the REVOLUTION of the Earth around the Sun. The orbit of the Earth around the Sun is elliptical and Earth is tilted.
What does “elliptical” mean?
Elliptical means “rounded shape like an oval”.
What season does the side facing the Sun experience?
Summer.
What does the side facing away from the Sun experience?
Winter.
When do the seasons change?
On the 21st of June, September, December and March.
