As viewed from space, Earth’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million kilometers (93 million miles), Earth is the third planet from the Sun and the fifth largest planet in the solar system.

   Our planet’s rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Earth’s atmosphere protects us from meteors as well, most of which burn up in the Earth’s atmosphere before they can strike the surface. The planet active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it formed about 4.6 billion years ago. The Earth has a single natural satellite – the moon.

The word consisting most nearly means ________.

Câu hỏi liên quan

• What do the Hindu people think about marriage?

• What do you think the passage is mainly about ?

• Satellites are used to .............

ZUNIA12

• The word “they” in line 17 refers to ......

• Which of the following could be considered a cause of the distress signals of trees?

• The word "thrive" is closest in meaning to ........

• Who is intended to benefit from the advice given in the article?

• All of the following are true about the 1970 survey of Antarctica EXCEPT that it______.

• What is Martin Luthur King well- known for?

• Lake Vostok is potentially important to scientists because it________.

• It can be inferred from the passage that tsunamis ________ .

• We should apologize .........

• It can be inferred from the passage that, in summer, ________.

• What is the main focus of this passage?

• Which of the following is mentioned as the main cause of the destruction of Mantle’s body?

• How did John feel when the aeroplane was taking off?

• Fish are suited to underwater life because of their ______

• Playing American football is the most similar to playing .........

• According to the passage, when will information stay in your short-term memory?

• Growing up by the sea, the writer felt ............