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26 Cards in this Set
- Front
- Back
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Is the axis tilted on all planets?
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Yes
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At what degree is the Earth's Axis tilted?
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23.5 degrees
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Does the tilt of the Earth ever change?
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No, even when it is orbitting, the Earth's tilt does not change.
However, the way the Earth tilts towards the sun changes. This is called "Seasons". |
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In which direction does the Earth
tilt when it is WINTER (Dec)? |
It tilts away from the Sun.
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In which direction does the Earth tilt when it is FALL (Sept)?
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It tilts sideways compared to the Sun. It is in the Neutral position.
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In which direction does the Earth tilt when it is SUMMER (June)?
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It tilts towards the Sun.
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In which direction does the Earth tilt when it is SPRING (March)?
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It tilts sideways compared to the Sun. It is in the Neutral position.
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The more the North Pole tilts toward the sun and the further north of the equator you are...
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...the more daylight you will receive.
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The more the North Pole tilts away from the sun and the further north of the equator you are...
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...the less daylight you will receive.
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On the equator, how will the day be split in regard to daylight?
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Out of a 24 hour day, more than 12 hours of it will be spent in daylight and less than 12 hours in darkness.
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Solstice
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When the North Pole tilts either directly toward the sun or directly away from the sun.
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Equinox
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When the North Pole of the earth
is in a Neutral position-it is not tilted toward or away from the sun. |
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Summer Solstice
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The start of Summer (June 20 or 21). The North Pole is at it's maximum tilt toward the Sun.
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Winter Solstice
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The start of Winter (Dec 20 or 21). The North Pole is at it's maximum tilt away from the sun.
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When the North Pole is tilted toward the sun...
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...The South Pole tilts away.
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What is the reason we have Seasons?
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The Earth's tilt.
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Fall or Autumnal Equinox
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Start of Fall (Sept. 23).
The Earth is neither tilted toward nor away from the sun. |
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Spring or Vernal Equinox
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The start of Spring (March 20 or 21).
The Earth is neither tilted toward or away from the sun. |
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How does the earth's tilt actually cause the different seasons?
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As the earth orbits the sun and the North Pole's tilt toward or away from the sun changes, we notice 2 things taking place.
1) First, the amount of daylight we receive changes.During some parts of the year the sun is simply out for more hours than at other times during the year. 2) Second, the angle at which the sun's rays strike us will also change. When the sun is higher in the sky, the rays will strike the earth at a larger angle.When the sun remains lower in the sky, the rays strike us at a smaller angle. |
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What would happen to our seasons if the tilt of the earth changed?
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If the earth were not tilted, we wouldn't have any seasons. If the tilt existed but was smaller than it is now, we would still have seasons, but they'd be less extreme. (This would give us cooler summers and warmer winters). If the tilt increased, our seasons would become more extreme. (This would give us hotter summers and colder winters).
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Horizon
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The point in the distance where the sky and the ground seem to touch each other.
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Zenith
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The point directly overhead. (This would be different for everyone.)
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Altitude
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The sun's altitude is the angle formed between the sun and the horizon.The altitude changes when the sun is in different places. The greatest possible altitude of the sun is 90 degrees (This occurs ONLY when it reaches the zenith.) The KEY thing to know is what altitude the sun reaches at noon. This maximum altitude will give us a clue as to how much heat we'll receive from the sun. The closer to 90 degrees, the more intense the heat will be.
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The greater the altitude of the sun...
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...the more heat we will receive from it!
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What is the greatest altitude that East Greenville, Pa will ever reach?
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72 degrees on June 21 at 1pm
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Explain our temperatures in regard to the altitude of the sun.
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???????
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