Key Ideas - Mars

Orbit means to -

• find ice

• travel around

• discover dust

• locate Mars

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Which key idea about Mars is supported by the details in paragraph 1?

• Scientists have found that the equator splits Mars into two parts.

• The equator is an imaginary line that circles Mars.

• Ice on Mars is hidden beneath dust at the planet's equator.

• The equator of Mars is warmer than other areas of the planet.

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Which key idea about Mars Express Mission is supported by the detail in paragraph 2 and 3?

• The Mars Express mission is used to find water on Mars.

• The Mars Express orbits Earth to study its atmosphere.

• The Mars Express is operated by NASA, a U.S. space agency.

• The Mars Express has discovered the largest amount of ice on Mars.

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Which key ideas about the ice deposits are supported by the details in “Discovering Ice Deposits”? Select TWO correct answers.

• A. Scientists needed more evidence before confirming the ice deposits.

• B. The discovery of ice suggests that water may have existed there long ago.

• C. The Medusae Fossae Formation was created by ice deposits.

• D. Mars Express has fully recorded all of Mars' underground ice.

• E. The presence of ice shows that Mars still has hidden resources.

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What is the main purpose of the Mars Express mission?

• To send astronauts to Mars

• To study and explore Mars

• To melt the ice deposits on Mars

• To build a base on Mars

Which detail from paragraph 8 and 9 supports the key idea that radars were beneficial in confirming the presence of ice?

• Radar is a system. It makes calculations.

• Then, the system measures how long it takes bounced signals to return.

• These signals matched signals of ice on the polar caps.

• Mars Express also found water-ice elsewhere on the planet.

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What key idea about discovering ice is supported by the details in paragraph 10?

• Scientists have used different types of missions to confirm the presence of ice on Mars.

• The Phoenix mission was the first and only spacecraft to find ice on Mars.

• Ice on Mars can only be found deep below the surface and in the polar regions.

• The Phoenix mission struggled to uncover ice beneath the surface of Mars.

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What key idea about Mars’ climate is supported by the detail in the section “The Climate on Mars”?

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Which method did scientists use to find the ice on Mars?

• By sending spacecraft directly to the ice

• By studying ice on the Martian surface with telescopes

• By using radar to send out radio waves and measure their return

• By sending astronauts to Mars to dig up ice

The tilt of Mars' axis affects the formation of ice. Use evidence from the text to support your answer.

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