the planet earth
Download
Skip this Video
Download Presentation
The Planet Earth

Loading in 2 Seconds...

play fullscreen
1 / 17

The Planet Earth - PowerPoint PPT Presentation


  • 93 Views
  • Uploaded on

The Planet Earth. What is the SIZE of the Earth?. Can you measure the SIZE of the Earth from your observation point?. 200 BC. ERATOSTHENES Measured the distance around the earth without leaving E gypt.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' The Planet Earth' - velma-cardenas


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
200 bc
200 BC

ERATOSTHENES

  • Measured the distance around the earth without leaving Egypt.
  • Assumed the earth is perfectly round and represented it in his drawings with a circle.
eratosthenes way
Eratosthenes’ Way
  • Measured the distance between Syene (present day Aswan) and Alexandria

500 mi ≈ 800 km

summer solstice
Summer Solstice
  • June 21st
  • Longest day of the year
eratosthenes calculation
Eratosthenes’ Calculation

Circumference of the Earth:25000 mi

Find the diameter and radius of the Earth

measure of the earth
Measure of the Earth

Circumference ≈ 24 900 mi

≈ 40003.60 km

Diameter ≈ 12 740 km

Radius≈ 6370 km

Note: These are only approximates since the earth is not perfectly round

slide16

7 926 mi ≈ 12 756 km

7 900 mi ≈ 12 714 km

things to bring
THINGS TO BRING:
  • RULER
  • PROTRACTOR
  • DRAWING COMPASS
ad