The Earth is the third planet from the Sun and the only planet known to have life on it. It is the fifth largest planet in the solar system and has a diameter of about 12,756 kilometers. The Earth's surface is made up of land and water, with about 29.2% of the surface land and the rest covered by water.

　　The Earth's atmosphere is essential for life to exist. It provides us with the air we breathe and protects us from harmful radiation from the Sun. The atmosphere also helps to regulate the Earth's temperature, making it suitable for life.

　　The Earth rotates on its axis once every 24 hours, causing day and night. It also revolves around the Sun, taking approximately 365.25 days to complete one orbit. This movement of the Earth results in the change of seasons.

　　The Earth's resources are finite, and it is important for us to conserve and protect them. We must also take care of the Earth's environment to ensure a sustainable future for all living beings.

　　Questions:

　　1、How many planets are there in the solar system that are larger than the Earth?

　　A. Four

　　B. Three

　　C. Two

　　D. One

　　2、What percentage of the Earth's surface is covered by water?

　　A. 29.2%

　　B. 70.8%

　　C. 50%

　　D. 100%

　　3、What does the Earth's atmosphere do for us?

　　A. It provides us with water.

　　B. It gives us harmful radiation.

　　C. It regulates the Earth's temperature.

　　D. It rotates the Earth on its axis.

　　4、How long does it take for the Earth to complete one orbit around the Sun?

　　A. 24 hours

　　B. 365 days

　　C. 365.25 days

　　D. 730 days

　　5、Why is it important for us to conserve and protect the Earth's resources?

　　A. To make money.

　　B. To ensure a sustainable future.

　　C. To rotate the Earth faster.

　　D. To cover more of the surface with land.

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