"Human Understanding of the Earth and the History of its Movement" Earth's Movement PPT Courseware 2

Description

"Human Understanding of the Earth and the History of its Movement" Earth's Movement PPT Courseware 2

1. How many possible explanations are there?

"Geocentric"

Ancient Greek geographer and astronomer. Long-term astronomical observation. He was the first scientist in the world to systematically study the composition and movement of the sun, moon and stars and make achievements. He proposed the "geocentric theory" theory.

The main points made by Ptolemy:

1. The earth is a sphere. If the earth were flat, everyone would see the sun or stars rising and setting at the same time, but this is not the case.

2. The earth is at the center of the universe and is stationary. If the earth rotates, it will inevitably cause other objects (such as clouds, etc.) to rotate together, but what people see is clouds and birds moving freely.

3. All the sun, moon and stars revolve around the earth and make a circular motion every day, because people see these sun, moon and stars rising in the east and setting in the west regularly every day.

The main points made by Copernicus:

1. The earth is spherical. If a light source is placed on the top of a ship's mast, when the ship sails away from the coast, people on the shore will see the light gradually decrease until it finally disappears, which shows that the surface of the earth is spherical.

2. The earth is in motion and rotates once every 24 hours. Because the sky is much larger than the earth, it would be difficult to imagine that the infinite sky was rotating but the earth was not moving.

3. The sun is stationary and is at the center of the universe. The earth and other planets all make circular motions around the sun.

What are the similarities and differences between the two views above?

What evidence did they use to support their respective opinions? Is this evidence sufficient?

Can these two theories reasonably explain the phenomenon of day and night?

Based on the above data, which of our explanations for the day-night cycle can be eliminated or retained? Why?

Keywords: Teaching courseware on the movement of the earth, teaching courseware on the history of human understanding of the earth and its movement, download of science PPT courseware for fifth grade volume 2 of the Education Science Edition, downloading of science slide courseware for fifth grade, downloading of PPT courseware on the movement of the earth, human understanding of the earth and its movement Download sports history PPT courseware in .PPT format;

For more information about the PPT courseware "The Movement of the Earth, Human Understanding of the Earth and its Movement History", please click the "The Movement of the Earth, Human Understanding of the Earth and its Movement History PPT" tag.

"Human Understanding of the Earth and the History of its Movement" Earth's Movement PPT courseware:

"Human Understanding of the Earth and the History of its Movement" The Movement of the Earth PPT Courseware The Movement of the Earth What people call the rotation of the Earth today is just describing the posture of the Earth itself orbiting the sun. It rotates once every 24 hours relative to its position relative to the sun. ; Relative to the star..

File Info

Update Time: 2024-11-10

This template belongs to science courseware Fifth Grade Science Volume 2, Textbook Edition industry PPT template

Preview