Definitions
traveling around something else in a circular path
revolution
shadow
the dark area behind an object that blocks light
the position of the sun in the sky changes during the day
rotation
when an object turns on its axis
season
4 divisions of the year defined by daylight hours and the earth's changing position with the sun
4 divisions of the year defined by daylight hours and the earth's changing position with the sun
season
3 ways your shadow changes during the day
1. shape (skinny or fat)
2. size (tall or short)
3. Direction (NW to N)
How can the sun tell you the season?
Explain the differences between summer and winter
Based on how high it is in the sky and how long it stays up (daylight hours)
Summer:
High in the sky, long days, earth tilted towards the sun
Winter
Low in the sky, short days, earth tilted away from the sun
the time between sunrise and sunset
day
the time in the morning when the sun first appears over the horizon
the time in the evening when the sun goes below the horizon
sunset
What causes night and day?
day is caused by exposure to the light from the sun. night is the effect of being in the earth's shadow.
When are shadows longer? And why
in the early morning and late afternoon because the sun is low in the sky
the star in the center of the solar system around which everything else obits a source of light
sun
axis
an imaginary line around which a sphere like a planet rotates
an imaginary line around which a sphere like a planet rotates
axis
How long is the earth's rotation?
24 hours
What are the shadow points? (3)
What changes the directions?
North- Noon
West- Sunrise
East- Sunset
Earth's rotation.
orientation
a position an object (direction)
revolution
traveling around something else in a circular path
the time in the morning when the sun first appears over the horizon
sunrise
What does the direction of a shadow tell us about the sun?
Shadow angles are evidence of a changing relationship between the sun and objects n the group.
True or false. The earth is always half in the sunlight and half in the darkness.
Explain your answer
True
The earth's rotation on its axis continually changes half of the earth's surface being exposed to sunlight.
day
the time between sunrise and sunset
sunset
the time in the evening when the sun goes below the horizon