Key Ideas - Mars

Orbit means to -

• find ice

• travel around

• discover dust

• locate Mars

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.

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.

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.

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.

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.

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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