"Prove that the Earth is Rotating" Earth's Movement PPT Download

Description

"Prove that the Earth is Rotating" Earth's Movement PPT Download

Part One: Exploring New Knowledge

Pendulum characteristics

Review: What are the characteristics of pendulums?

The pendulum has the characteristic of maintaining a constant swing direction.

Foucault was a French physicist. When he was studying the laws of the pendulum at home, he accidentally discovered that when he placed the pendulum and its bracket on a circular chassis, swung the pendulum and slowly rotated the circular chassis, the pendulum The direction of the swing does not rotate with the rotation of the disk, but remains basically unchanged.

Experimental tips:

1. The pendulum should be slightly heavier and the cycloid should be slightly longer;

2. Rotate the chassis smoothly and slowly to minimize the impact of external forces on the direction of the pendulum movement;

3. Keep observation records.

Foucault's Pendulum

In 1851, 300 years after the "heliocentric theory" was published, Foucault experimentally confirmed that the earth is rotating based on his findings in daily life.

Foucault hung an iron ball pendulum with a length of more than 60 meters and a weight of 27 kilograms in a tall dome building, and drew a dial on the ground below the pendulum. At that time, many people came to watch this wonderful experiment. The pendulum swung, and as time passed by, people were surprised to see that the direction indicated by the dial and the direction of the pendulum swing were quietly "deflecting", and they were deflecting in the clockwise direction. Since the pendulum keeps swinging in the same direction, this proves that the Earth is rotating. People finally saw the earth rotating with their own eyes.

think:

1. What kind of special pendulum is "Foucault's Pendulum"?

2. Why do you think it is designed this way?

3. What phenomena occur after the "Foucault Pendulum" swings?

Prove that the earth is rotating PPT, part 2: expansion and extension

Kepler's three laws, also known as "Kepler's three laws" or "laws of planetary motion", refer to the laws followed by planets revolving around the sun in space.

"Foucault's Pendulum" plays a very important role in the history of science. Humanity used "Foucault's Pendulum" to experimentally prove the rotation of the earth for the first time.

Summary of this lesson

The pendulum has the characteristic of keeping its swing direction unchanged. "Foucault's pendulum" is strong evidence of the earth's rotation.

Prove that the Earth is rotating PPT, Part 3: Exercises for this lesson

1. Fill in the blanks

1. Experiments have shown that the pendulum has the characteristic of maintaining ( ).

2. "Foucault's pendulum" is strong evidence to prove ( ).

3. In 1851, 300 years after ( ) was published, Foucault experimentally confirmed ( ) based on his findings in daily life.

4. Foucault used a type of ( ) to conduct experiments.

2. Judgment questions

1. The rotation of the earth cannot be felt. ( )

2. The cycloid is long and the swing time is long. ( )

3. "Foucault's Pendulum" plays a very important role in the history of science. Humanity used "Foucault's Pendulum" to experimentally prove the rotation of the earth for the first time. ( )

4. Many phenomena in life are related to the rotation of the earth. ( )

Prove that the Earth is rotating PPT, Part 4: Homework

Find information to explain what natural phenomena are caused by the rotation of the earth?

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Update Time: 2024-11-01

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