Day and Night
The length of daytime changes during the year. Why does this happen?
Because Earth spins on its axis and moves around the Sun
The Sun doesn't actually move, the ____ does
How long does it take Earth to make one full rotation on its axis?
24 hours
A cycle of time consisting of 24 hours; also the period of time for the side of Earth in sunlight
Day
To slant
Tilt
What causes day and night on Earth?
The rotation of Earth on its axis
Making a complete spin on an axis
rotation
What is caused by Earth's orbit around the Sun and the tilt of Earth's axis?
seasons
The area where light is blocked
shadow
What causes winter in the northern hemisphere?
The tilt of Earth's axis
Why don't all parts of Earth have day and night at the same time?
Each rotates on its axis, and only the part of Earth facing the Sun experiences day.
Making a complete turn around another object
revolution
In which direction does the Earth rotate, and how long does a full rotation take?
Counterclockwise; 24 hours
Turning or spinning around an axis
rotation
What is the MOST important cause of Earth's seasons?
Earth's tilt
If I want to demonstrate why the length of day and night change throughout the year using a globe and flashlight, which two factors are most important for me to use?
The tilt of the Earth on its axis and Earth's orbit around the Sun
The 24-hour cycle for Earth to make one complete rotation is also called a ___
day
An imaginary line that a sphere rotates around
axis
The period of time when a location on Earth does not experience sunlight
night
During the summer, the Sun reaches its highest path in the sky, causing more ________ hours.
daylight
When we get the least direct sunlight, we experience
winter
The Sun appears to come up in the ______, and then seems to disappear, or set, in the ____.
East; West
What would happen to seasons if Earth were no longer tilted on its axis?
There would be no more seasons
A sequence of events that repeats itself
Cycle
The southern hemisphere has short days and long nights when it is tilted away from the Sun. Which season is this hemisphere experiencing?
Winter