Survey
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Earth-Sun Relations and Physical Processes Pre-test 1. Which direction does the earth rotate? (East to West, or West to East?) 2. How long does it take the earth to make a full rotation? 3. How long does it take the earth to make a full revolution? 4. Why are the days longer some times of the year than others? 5. Why is it winter in the southern hemisphere right now? The Earth rotates, or spins, from West to East and this is why we see the sun rise in the East and set in the West. Result of this rotation is Night and Day. It makes one complete revolution every 365.25 days. Our 365 day year is based on the revolution of the Earth around the Sun. Tilt The Earth’s Axis is not parallel to the Sun’s Rays. If it were, every day would have as many hours of daylight as darkness. You may have noticed that this is not the case... Seasons are caused by the tilt of the earth’s axis as it revolves around the sun. Earths Axis Seasons – As the Earth Revolves around the Sun, its Tilt causes some areas to receive more direct sunlight than others. When the Sun’s rays are directed towards the Southern Hemisphere, it is Summer in the South Latitudes while the Northern Hemisphere experiences Winter. Pre-test, Part 2 1. What is the water cycle? 2. What is the biosphere? 3. What is the difference between erosion and weathering? 4. Why do tectonic plates move? 5. What is the result of tectonic plate movement? Bio Sphere Erosion=involves movement Weathering=one place Chemical vs. Mechanical Caused by separation, colliding, subduction or transformation of plates Most occur along fault lines Earthquakes can cause tsunami’s or giant waves that can travel across the ocean and cause loss of life and property to many people