Pressure and Temperature

Why do scientists look for evidence of water on Mars?

• • To find minerals

• • To locate areas for colonization

• • To look for signs of life

• • To measure pressure differences

What happens to water on Mars at low temperatures?

• • It freezes into solid ice

• • It remains liquid for a long time

• • It changes into gas quickly

• • It boils violently

Tags

NGSS.MS-PS1-4

What is air pressure?

• • A measure of temperature

• • The force exerted by the atmosphere

• • The weight of water on the ground

• • The movement of gas molecules

What is the average air pressure at sea level on Earth?

• • 0.5 atm

• • 1 atm

• • 2 atm

• • 100 atm

How does Mars’s air pressure compare to Earth’s?

• • It is 10 times higher

• • It is the same

• • It is about 100 times lower

• • It fluctuates wildly

At what temperature does water evaporate on Mars?

• • 0°C

• • 10°C

• • 50°C

• • 100°C

Tags

NGSS.MS-PS3-4

What is the key feature of a pressure cooker?

• • It uses high temperatures

• • It seals and traps steam inside

• • It has a glass lid

• • It works only at low pressure

What happens to water in a pressure cooker?

• • It boils faster at a lower temperature

• • It remains liquid at higher temperatures

• • It evaporates at 10°C

• • It freezes

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Why is liquid water rare on Mars?

• • It freezes immediately

• • It evaporates quickly due to low pressure

• • There is no sunlight

• • The ground is too hot

1. What can the behavior of water on Mars teach us?

• • About Mars’s pressure and temperature

• • About Earth’s wildlife

• • About distant galaxies

• • About space travel