Exploring Mars

Mars, once thought to be similar to Earth and possibly hosting life, has been extensively studied. Scientific missions have revealed it as a rocky planet with iron oxide-rich soils, inactive volcanoes, and evidence of past water flow. Mars has a thin atmosphere, making it colder than Earth, and no life forms have been found yet.

What was Mars initially thought to be similar to?

• Saturn

• Jupiter

• Earth

• Venus

What have spacecraft discovered about the surface of Mars?

• It has a thick atmosphere

• It is made of gas

• It contains high concentrations of red iron oxide

• It is covered in water

What geological features are found on Mars?

• Dense forests

• Massive inactive volcanoes

• Large oceans

• Active volcanoes

What evidence suggests that liquid water may have once existed on Mars?

• Finding of underwater caves

• Existence of large lakes

• Discovery of active geysers

• Presence of large channels

Why is Mars colder than Earth?

• It has no atmosphere

• It is covered in ice

• It has a thin atmosphere that does not retain heat well

• It is farther from the sun