Mod 16 seasons, why do we have them vocabulary
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Vocabulary
Seasons: Why do we have them?
Earth and Environmental Science
For NCVPS
Module 16
Kella Randolph, M. Ed
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Direct sunlight – sunlight that strikes Earth’s surface at close to a 90° angle.
Direct sunlight – sunlight that strikes Earth’s surface at close to a 90° angle.
324x400-icp.giss.nasa.gov
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Earth’s axis – an imaginary line through the center of Earth that connects the North Pole to the South Pole.
clasfaculty.ucdenver.edu1601 × 1135
Earth rotates about its axis once every 24 hours.
Earth’s axis is tilted at an angle of 23.5 degrees.
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Equator
scijinks.jpl.nasa.gov800 × 597
an imaginary horizontal line around the middle of Earth.
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Northern hemisphere – the half of Earth north of the equator.
www.astronomy.org570 × 320
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Hemispheres
urbanext.illinois.edu900 × 600
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North Pole – the northernmost point on Earth.
earthobservatory.nasa.gov1280 × 720
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Indirect sunlight – sunlight that strikes Earth’s surface at an acute angle (less than 90˚).
http://scijinks.jpl.nasa.gov/solstice
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Season – one of the major divisions of the year, usually based on regular weather changes.
In most places, the year is divided into four seasons: winter, spring, summer, and autumn (fall). Each season is three months long.
In tropical regions, average temperatures do not change much during the year. In these regions, it is common to refer to the “rainy season” and the “dry season.”
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Southern hemisphere – the half of Earth south of the equator.
http://urbanext.illinois.edu/treehouse/seasons.cfm?Slide=6
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South Pole – the southernmost point on Earth.
science.dodlive.mil330 × 317
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Summer solstice – the first day of summer.
The summer solstice is the longest day of the year. North and south of the tropics, it is also the day when the noon Sun is highest in the sky.
In the northern hemisphere the summer solstice occurs on or near June 21.
In the southern hemisphere the summer solstice occurs on or near December 21.
Solarsystem.nasa.gov732x520
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Winter solstice – the first day of winter.
spacescience.arc.nasa.gov860 × 389
The winter solstice is the shortest day of the year. It is also the day when the noon Sun is lowest in the sky.
In the northern hemisphere the winter solstice occurs on or near December 21.
In the southern hemisphere the winter solstice occurs on or near June 21.
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Module 16 Why do we have seasons?
NCVPS
Kella Randolph M.Ed.