the planet earth. what is the shape of the earth?
TRANSCRIPT
- Slide 1
- The Planet Earth
- Slide 2
- What is the Shape of the Earth?
- Slide 3
- Tagbanwas of Palawan Believed that land is mostly mountains surrounded by water, and underneath is an exact but inverted image of land and water and all that are in them.
- Slide 4
- Shape of the Earth About 100 BC to 1500 AD Mayans and Aztecs of South Americas -believed the earth had a general shape of a flat cross About 1400 BC Hindu Writing -described the earth as a round disk 200 BC Aristarchus -Reasoned that the earth is round
- Slide 5
- The Earth is Round
- Slide 6
- How does the Earth appear to an observer in an open field where no trees or buildings block his view?
- Slide 7
- Horizon The line where the sky and the ground seem to meet The greatest distance an observer sees on the Earths surface. A 1.6 m tall person can see up to 4.5 km away At 2500 m high one can see up to 178 km away
- Slide 8
- Slide 9
- Activity # 1 1.List at least seven differences in your notebook. 2.What are the possible explanations for the change in scenery?
- Slide 10
- Evidence that the Earth is Round
- Slide 11
- Space Photos
- Slide 12
- Sinking Ship Theory
- Slide 13
- Altitude of Polaris Altitude of Polaris = Latitude
- Slide 14
- Slide 15
- All other stars will move in a counterclockwise direction but Polaris will stay as it is
- Slide 16
- Slide 17
- Astrolabe
- Slide 18
- Slide 19
- Star Paths Across the Sky
- Slide 20
- Activity #2 Object Shadow/s formed (identify by number) Egg Kalamansi Coin Jar Cover Ball Can
- Slide 21
- Lunar Eclipse
- Slide 22
- True Shape of the Earth Oblate spheroid Poles squished and equator bulges Earth rotates on its axis centripetal force pushes squishes the poles and pushes out in the equator
- Slide 23
- Slide 24
- Apparent Shape Earth appears to be a PERFECT Sphere
- Slide 25
- Slide 26
- Gravity Measurement Weigh more at South Pole closer Weight less at Equator farther
- Slide 27
- Current Findings The Earth is like a lumpy POTATO