Soil – Clip

Mars' red soil is a result of iron-rich rocks reacting with water, forming iron oxide. This process, known as oxidation or rusting, spread iron oxide across the planet, giving Mars its distinctive red color.

What natural process wore away the iron-rich rocks on Mars?

• Meteor impacts

• Flowing water

• Volcanic eruptions

• Wind erosion

What is the chemical reaction called when oxygen reacts with iron?

• Combustion

• Oxidation

• Fermentation

• Photosynthesis

What compound is formed when iron reacts with oxygen in water?

• Iron oxide

• Iron sulfate

• Iron nitrate

• Iron chloride

What is the main reason Mars appears red?

• Atmospheric gases

• Red sand dunes

• Iron oxide in the soil

• Presence of red algae

How was the iron oxide-rich soil distributed across Mars?

• By tectonic shifts

• By wind

• By flowing water

• By volcanic activity