Science - SEASONS - 1.2
Earth rotates - time = -- hrs = --- ---
1, 24, one day
Earth revolves - time = --- days = - year.
1, 365, 1
months = based on moon's cycle.
12
What degree is the Earth tilted at?
23.5 degrees
The time from 1 full moon to the next ≅ --days.
29
days = time it takes Earth to complete revolution around the sun
365
What is Earth's axis?
An imaginary line in the center of the Earth going down the North and South Pole.
What are the two main reasons for seasons?
Earth's axis is tilted as it revolves around the sun.
During Spring and Fall where does the sun's ray hit the strongest?
Equator
When it is winter in the Northern Hemisphere, what season is it in the Southern Hemisphere?
If it is winter in one hemisphere it is summer in the other.
What would happen if Earth's axis were straight up and down?
If the Earth is not tilted, the sun would always be just on the horizon all day every day at the poles. To sum up, we would have no night and day since the season depend on the earth angle of 23.5°. If we have no season our day and night would be messed up too.We would have the same season all year long.
In which season is there the least daylight?
In winter there is the least amount of daylight
When the sunlight can't reach the otherside of the world it is what there?
It is night where the sunlight cannot reach
Earth's orbit brings the planet closest to the sun in
January
Suppose you lived at the Equator. Would you experience winter and summer? Explain!
No,near the equator sunlight does not spread far.
What is an orbit?
Orbit is a path
How does Earth move?
Revolution and Rotation
What is Revolution?
Revolution is the movement of one object around another
What dates are most solstices around?
Summer;June 21 Winter;December21
The number of hours in a day will never change, just the number of daylight or darkness hours
TRUE
If the angle of the tilt of Earth is always the same, then what is different at different points in Earth's revolutions?
The direction the Earth is leaning toward the sun at.
What is a equinox?
The noon sun is directly overhead at the equator and has about equal day and night
What is rotation?
The spinning of Earth on its axis is called rotation
What cause day and night?
The spinning of Earth on its axis.
What are solstices?
The sun appears farthest north of the equator once each year and farthest south each year
During summer which hemisphere and tropic receives more of sun's ray.
Tropic of Cancer;Northern Hemisphere
During winter which hemisphere and tropic receives more of sun's ray.
Tropic of Capricorn;Southern Hemisphere
What dates are most equinoxes around?
Vernal;March 21 Fall;September 21
What change do we see as a result of Earth's revolution around the sun?
We have different seasons so we see different constellations etc.
What season are we closet to the sun?
Winter
A calendar is a system of organizing time that defines the ---------, -------, and ---------- of a year.
beginning,lenght,divisions.
What change do we see as a result of Earth's rotation?
day and night
As Earth rotates --------, the sun appears to move -------- across the sky.
eastward and westward
In spring/fall there are ----- days and ----- nights
equal
In summer there are ------ days and ------- nights
longer, shorter
People of many cultures have divided time based on the
motions of the Earth and Moon(and Sun)
time it takes Earth to turn once on its axis.
one day
One revolution of Earth around the sun = --- ----.
one year
Earth's path, or ----- is a slightly elongated circle or -------
orbit, ellipse
In winter there are ------- days and ------ nights
shorter, longer
The most common calendar is divided into
years, months & days
