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Written Activity Science Semester Project
TEKS 7A: model and illustrate how the tilted earth rotates on its axis, causing day night, and revolves around the sun causing changes in seasons.
Questions: 1. Why doesn’t the Earth drift off into space when orbiting the sun.
2. What’s the angle of Earth’s tilt?
3. What causes day and night?
4. Why doesn’t the sun swallow the earth?
5. Why are there seasons?
6. Where position is earth when it is summer in the Northern Hemisphere?
7. What keeps the Earth orbiting?
Facts: 1. Earth rotates around sun because Earth is within proximity of the sun’s gravitational pull.
2. The force acting on Earth is balanced which causes it to stay where it is. (Staying in orbit).
3. While rotating around the sun the seasons change on earth. Ex. If the Southern Hemisphere is experincing warmer weather then it is winter in the Northern Hemisphere.
4. The Earth is tilted at 23.5 degrees from perpendicular to the plane of orbit.

5. When the Earth rotates on the axis, it causes day and night. The side facing the sun is day, and the other half is dark (night time).

(model and illustrate how the tilted earth rotates on it’s axis, causing day and night, and revolves around the sun causing changes in seasons)
For the written activity, we plan to explain how this TEK works and provide some examples/notes and questions to cause the reader to think about the concepts
On the written evaluation, we plan to ask about 15 questions(5 multiple choice, 5 fill in the blank, 5 true or false) These questions will all be covered in the written activity prior to this test.
For the hands on activity, we will connect a styrofoam ball to either a light bulb or a larger styrofoam ball via metal wire so you can spin the earth yourself and see the effects of the tilt.
For the presentation, we plan on having at least a 10 page slide show providing all the facts and extras needed with at least 1 video included.