"The History of Human Understanding of the Earth and Its Movement" Earth's Movement PPT Download

Description

"The History of Human Understanding of the Earth and Its Movement" Earth's Movement PPT Download

Part One: Exploring New Knowledge

How many possible explanations are there?

Ptolemy was an ancient Greek astronomer who was born around AD 100. Regarding the earth and its movement, he proposed the "geocentric theory" theory.

Geocentric

The main points made by Ptolemy are:

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 on the earth revolve around the earth and make a circular motion every day, because what people see is that these celestial bodies rise in the east and set in the west regularly every day.

The main basis of "geocentric theory":

The free movement of clouds and birds indicates that the earth is not rotating.

Think about it, which explanation in the simulation experiment does Ptolemy's view correspond to?

Ptolemy's "geocentric theory" is equivalent to the simulation experiment in which the earth does not move and the sun revolves around the earth.

heliocentric theory

The main points made by Copernicus are:

1. The earth is spherical.

If a light source is placed on the top of the 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 is unimaginable if the infinite sky is rotating and the earth is not moving.

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

The main basis of "heliocentric theory":

The sky cannot rotate once in 24 hours.

Think about it, which explanation in the simulation experiment does Copernicus's view correspond to?

Copernicus' "heliocentric theory" is equivalent to the simulation experiment in which the sun does not move and the earth revolves around the earth.

PPT on the history of human understanding of the earth and its movement, part 2: expansion and extension

There were four main schools of astronomy in ancient Greece: the first was the Ionian school, the second was the Pythagorean school, the third was the Platonic school, and the fourth was the Alexandrian school. The fourth school lasted the longest and achieved the greatest astronomical achievements.

PPT on the history of human understanding of the earth and its movement, part three: class summary

In the "heliocentric theory" and the "geocentric theory", the relative motion of the earth and the sun may cause the phenomenon of day and night alternating.

PPT on the history of human understanding of the earth and its movement, Part 4: Classroom exercises

1. Judgment questions

1. "Geocentric theory", also known as "Earth-centered theory", believes that the earth is stationary at the center of the universe. ( )

2. Ptolemy's "heliocentric theory" is mainly based on the fact that the sky cannot rotate once in 24 hours. ( )

3. The relative circular motion of the sun and the earth may cause the alternation of day and night. ( )

PPT on the history of human understanding of the earth and its movement, Part 5: Homework

After consulting the information, why can only one side of the moon be seen when observing the moon from the earth?

Keywords: Free download of Chinese PPT courseware for the second volume of the fifth grade of the textbook version, PPT download of the history of human understanding of the earth and its movement, PPT download of the movement of the earth, .PPT format;

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

"Explanation of Polar Day and Polar Night" PPT download of the movement of the earth:

"Explanation of Polar Day and Polar Night" PPT Download of Earth's Movement Part One: Exploring New Knowledge The phenomenon of polar day and polar night The phenomenon of polar day and polar night is the result of the tilt of the earth's axis causing sunlight to hit the polar regions at different times. So people in the polar regions can see the sun for a period of time...

"Explanation of Polar Day and Polar Night" Earth's Movement PPT:

"Explanation of Polar Day and Polar Night" PPT on the Movement of the Earth Part One: The Phenomenon of Polar Day and Polar Night There are many strange things in the Antarctic and Arctic of the Earth, one of which is that the polar day or night is very long. In the northern hemisphere summer, the sun always hangs over the North Pole..

"Why there are four seasons in a year" PPT download of the movement of the earth:

"Why there are four seasons in a year" PPT download of the movement of the earth Part One: Exploring new knowledge The ancients used the method of studying the four seasons: pole measurement and publishing the measurement results. The length of the pole shadow will be used as a known condition for studying the four seasons and used to judge the seasons..

File Info

Update Time: 2024-11-22

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

Preview