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Published byClinton Watkins Modified over 9 years ago
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Warm Up 1.Think about how the weather changes throughout the year (from January to December). Describe in complete sentences or draw detailed pictures (at least 4) to show how the weather changes throughout the year.
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Our revolution and rotation is determined by how close or how far we are from the sun In astronaut terms, this is determined by the astronomical unit -1 A.U. is the distance from Earth to the Sun -The Earth, like all planets, orbits (revolves around) the sun How long is one full revolution? 365.25 days = 1 year
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The Earth rotates on its axis 1 full rotation = one day DAY warmer NIGHT cooler
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Earth’s axis is not straight –Earth’s axis is tilted 23.5 ° from vertical Earth’s axis is not straight –Earth’s axis is tilted 23.5 ° from vertical 4 23.5 ° tilt
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Our Modern Calendar Day is the time required for the Earth to rotate on its axis. (23hr56min) Length of day animation –http://www3.eboard.com/boards/16/92/94/B rownstein/att- 1573310/LengthofDay%5B1%5D.swfhttp://www3.eboard.com/boards/16/92/94/B rownstein/att- 1573310/LengthofDay%5B1%5D.swf
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The Earth’s orbit actually looks like this This shows orbit
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Why does that matter? The Earth’s tilted axis allows us to have seasons
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EXAMPLE! warmer cooler
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4 seasons based on Earth’s position to the sun What affects our position to the sun?! WinterSummerFallSpring
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Tilt (towards/ neutral/away) Radiation (high/neutral/ low) Temperature (warm/ moderate/ cool) Season Summer Winter Fall Spring
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Alien Planets Activity 12
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Scale of the Universe http://scaleofuniverse.com
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POSTCARD Pick a place on the map you will travel to over winter break. Write a postcard telling your friend what season it is there. Explain why it is that season. Describe what the temperature is like. For the picture on your postcard (on the back), draw what the Earth and sun would look like for this season. Pick a place on the map you will travel to over winter break. Write a postcard telling your friend what season it is there. Explain why it is that season. Describe what the temperature is like. For the picture on your postcard (on the back), draw what the Earth and sun would look like for this season. 14 1 2 3 4 1.Alaska 2.South Africa 3.Brazil 4.England 1.Alaska 2.South Africa 3.Brazil 4.England
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EXIT TICKET 1.Why are summer days in Charlotte hotter (warmer) than winter days in Charlotte? 2.Look at the diagram shown. Which position would Earth be at when it is winter in Charlotte?
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