EIS Lessons 2-4 Study Slideshow with Links to Study Tools

Moon's Revolution

• It takes the moon 27.322 days to revolve around the Earth. This is around the time of a month.
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Stars in the Sky

• Due to the motion, they make and the movement of the Earth, on it's axis and revolution, the stars seem to move.
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• Bildunterschrift: Stars DON'T actually look like this :) They look like planets!

The Moon's Size Compared to Earth

• The Moon is 1/4 of the size of the Earth.
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Earth's Orbit Around the Sun

• It takes Earth 365 and 1/4 days to orbit the Sun.
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Earth's Rotation on It's Axis

• It takes 24 hours for the Earth to rotate on its axis.
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Moon Compared to Sun size

• ​​​​​​Because the Sun is 400 times the Moon’s size but they are 400 times farther away from the Sun so, those two variables even each other out.
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Sun Rising and Setting

• ​​​​​​​The sun appears to rise in the east and set in the west.
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Shadows in the Northern Hemisphere

• ​​​​​​Shadows in the Winter and Summer differ because the sun is at different heights so they vary. The winter shadows become longer than those in summer due to the angles.
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Sun's Hight in the Sky

• The sun is higher in the sky during summer rather than winter.
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Shadow Length

• Shadows are shorter in length in summer because the angle is more direct compared to winter angles.
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Equinox

• A day that occurs between solstices. It is where day and night are equal in hours.
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When do the Equinoxes Occur?

• In between the summer and winter solstice.
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Why is the North Star important?

• It provides a stable marker in the Northern Hemisphere for the Earth's tilt on its axis.
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Northern Hemisphere Summer

• When the Northern Hemisphere experiences summer, the Southern Hemisphere experiences winter because it is receiving indirect sunlight.
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Rise Latest Set Earliest Season

• This occurs in winter because it has the least amount of hours in a day.
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Summer and Winter

• Summer is experienced in the Northern Hemisphere and winter is experienced in the Southern Hemisphere. I know this because the Northern Hemisphere is receiving direct sunlight while the Southern Hemisphere is receiving indirect.

Seasons

• Because throughout the pattern, different sides of the Earth are facing the sun at different times. This is also known as indirect sunlight. This causes one area of the globe to be warm and continue to stay warm for a period of time, while on the other side, it is cold for a period of time.

Resources to Study By:

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• EIS Lessons 2-4 Study Flashcards
• Units 2-4 Practice Quiz 1
• Bildunterschrift: Clearly this is not what the planets look like in real life but I thought it was cool!