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Science (4TH Q.)
Module 17
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What is the average temperature when latitudes are lower?
warmer
What is the average temperature when latitudes are higher?
cooler
What is the average temperature when the amount of sunlight is near the equator?
warmer
What is the average temperature when the amount of sunlight is near the poles?
cooler
Different parts of the Earth receive different amounts of
solar radiation
When the sun's rays strike Earth's surface near the equator, the incoming solar radiation is more
direct
Solar radiation
is concentrated over a smaller surface area, causing warmer temperatures
Earth
- revolves around the Sun once each year
Earth
- spins on its axis of rotation once each day
axis of rotation
- tilted 23.5⁰
axis of rotation
- pointed toward Polaris, the North Star
Tilt of Earth's axis
- stays lined up with the North Star
Equinox
- equal length of day and night
Solstice
- not equal length of day and night
Types of Equinox Phenomenons
Spring
Autumn
Equinox
- The length of the day is equal to the lenght of the night
Equinox
- The Sun's solar energy hits the equator at 90⁰ angle
Spring Equinox
- March 20 (Northern Hemisphere)
Autumn Equinox
- September 22 (Northern Hemisphere)
Types of Solstice Phenomenons
Winter
Summer
Winter Solstice
- December 21 (Northern Hemisphere)
Winter Solstice
- has the shortest day of the year
Summer Solstice
- June 21 (Northern Hemisphere)
Summer Solstice
- has the longest day of the year as a consequence of the earth's tilt
Summer Solstice
- north pole is tilted towards the sun
Summer Solstice
- sunlight hits the earth's surface perpendiculary at 23.5⁰ north latitude (Tropic of Cancer)
Arctic Circle
- 66.5⁰ north latitude
Antarctic Cirlce
- 66.5⁰ south latitude
Winter Solstice
- north pole is tilted away from the sun
Winter Solstice
- sunlight hits the earth's surface perpebdicular at 23.5⁰ south latitude (Tropic of Capricorn)
During Winter Solstice, the
Arctic Circle
experiences 6 months without a
sun
in the sky