Planet Mercury

Mercury, the closest planet to the Sun, has been significantly altered by its proximity. The Sun's heat has stripped away lighter elements, leaving a rocky and metallic planet. With no atmosphere, its surface is marked by craters. Mercury experiences extreme temperatures, with lead melting during the day and iron becoming brittle at night. Venus is visible in Mercury's sky.

What is the primary reason Mercury has lost much of its original material?

• It collided with another planet.

• The Sun's heat caused it to vaporize.

• It was pulled by Venus's gravity.

• It was hit by a large meteorite.

Why do craters on Mercury remain unchanged over time?

• Mercury's surface is covered by water.

• The planet is constantly resurfaced by volcanic activity.

• Mercury has a thick atmosphere.

• There is no atmosphere or erosion to alter them.

What happens to lead on Mercury at noon?

• It evaporates.

• It melts.

• It remains solid.

• It becomes brittle.

What is the temperature like on Mercury at night?

• It is similar to daytime temperatures.

• It becomes extremely cold.

• It is moderate and comfortable.

• It remains warm.

Which planet can be seen in the sky from Mercury at night?

• Saturn

• Venus

• Mars

• Jupiter