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 ________.

In the passage, the expression "children interrupt their education to go to school" mostly implies that ..........

Co-education was negatively responded to in _______.

What is the main point the writer is trying to make in the last paragraph?

Which of the following is NOT true according to the text?

What use was made of the nineteenth-century women's history materials in the Schlesinger Library and the Sophia Smith Collection?

According to the writer, why is the choice of your second job important?

The author states that the reason that infants need to avoid certain foods related to allergies has to do with the infant's ___________ .

The phrase "a resonant hoot" is closest in meaning to ............

What does “they” refer to?

According to the author, M.L. _______.

Which of the following would NOT be a problem for the construction plan?

It is ............ to write the rules that tell exactly when we should apologize.

It can be inferred from the passage that the eye ___.

According to the passage, which of the following is TRUE about the 1987 supernova?

According to paragraph 2, parents in Mongolia feed their child's lost tooth to a dog because ______.

The series was designed _____________

According to the passage, students working for their first degree at .............. are called undergraduates.

The word ‘monumental’ in Paragraph 2 means ..............

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

How did Juliette Davidson benefit from the experience of her first job?