Time Zones
Our planet, the Earth, is the third planet from the sun.√
It is a beautiful, rotating sphere.√
The side facing the Sun is in daylight.√
The side facing away from the sun is in darkness.√
For example, when it’s daytime in the US, it’s nighttime in China.√
In fact, there’s a 12-hour time difference between Boston and Shanghai.
When it’s midnight in Shanghai, it’s noon in Boston.
听选Which side of the Earth is in daylight?-The side facing the Sun is in daylight.
听选Which side of the Earth is in darkness?-The side facing away from the sun is in darkness.
听选What time a day is noon？-
填空：For example, when it’s daytime in the US, it’s nighttime in China.
What is the shape of our planet?- Earth is a beautiful, rotating sphere.
The earth rotates from west to east.√
To know which direction is east or west, watch the Sun.√
The Sun travels through the sky from east to west.√
The Sun comes up in the east and goes down in the west.√
Again, this is because the Earth rotates.√
It takes 24 hours for the Earth to make a complete rotation.√
And that is the length of one day.√
听选What rotates from west to east? - The Earth rotates from west to east.
填空It takes 24 hours for the Earth to make a complete rotation.
填空It takes 24 hours for the Earth to make a complete rotation.
听说Our planet, the Earth, is the third planet from the sun.
听说The Sun travels through the sky from east to west.
听说When it’s midnight in Shanghai, it’s noon in Boston.
看说For example, when it’s daytime in the US, it’s nighttime in China.
看说To know which direction is east or west, watch the Sun.
How long does it take the Earth to make a complete rotation? - It takes 24 hours for the Earth to make a complete rotation.
To know which direction is east or west, watch the Sun.
Because of the Earth’s rotation, the earth is divided into time zones.
Some countries, such as the US, have several time zones.√
When it’s 10 am in New York, it’s 7 am in San Francisco.√
Europe and the US are separated by several time zones.
When it’s 5:00 pm in Paris, it’s 11:00 am in Boston.√
So there's a 6-hour difference between Paris and Boston.√
One large country, China, has just one time zone for the whole country.
As a result, at the same time, some parts of the country can be dark and other parts can be light.√
听选Why is the Earth divided into time zones? -The earth is divided into time zones because of the Earth’s rotation
填空Europe and the US are separated by several time zones.
Which large country has only one time zone?- China has just one time zone for the whole country.
As you travel around the earth, the time changes.√
The time of day depends on your location on the planet.√
When you travel east or west, you may cross several time zones.√
For example, if you travel from Beijing to Los Angeles, you cross 8 time zones.√
That means, when it’s noon on Sunday in China, it’s 8:00 pm on Saturday in Los Angeles.√
For travelers, this means it can be very difficult to sleep after a long flight.
The clock may say 8:00 pm, but for your body it’s noon.√
This is called jet lag.√
听选What changes as you travel around the earth?-As you travel around the earth, the time changes.
听选What happens if you travel from Beijing to Los Angeles? -You will cross 8 time zones.
填空When you travel east or west, you may cross several time zones.
听说Europe and the US are separated by several time zones.
听说As you travel around the earth, the time changes.
听说Crossing several time zones causes jet lag.
看说Because of the Earth’s rotation, the earth is divided into time zones.
看说One large country, China, has just one time zone for the whole country.
What happens if you travel east or west?-When you travel east or west, you may cross several time zones.
The time of day depends on your location on the planet.
The time of day depends on your location on the planet.
Some countries, such as the US, have several time zones.
When you travel east or west, you may cross several time zones.
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