Liquid Water on Mars

What did NASA announce they found on the surface of Mars?

• Flowing liquid water

• Frozen water ice

• Underground rivers

• Dry riverbeds

What property of perchlorate salts allows liquid water to exist on Mars?

• They make water evaporate faster.

• They increase water's freezing point.

• They lower water's freezing point and the pressure at which it evaporates.

• They are not related to water's state.

Which instrument was primarily used to identify the chemical composition of the Recurring Slope Lineae (RSLs) on Mars?

• HiRISE visual light camera

• Mars Reconnaissance Orbiter

• Spectrometer

• Telescope

Why are scientists concerned about Earth bacteria colonizing areas on Mars where liquid water is found?

• It could make Mars habitable for humans.

• It could help grow potatoes on Mars.

• It could contaminate samples and destroy potential Martian ecosystems.

• It would prove that life exists on Mars.