Liquid Oxygen

What is the typical phase of oxygen on Earth?

• Solid

• Liquid

• Gas

• Plasma

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What color is liquid oxygen?

• Red

• Pale blue

• Clear

• Green

Why is liquid oxygen rare?

• Oxygen molecules are strongly attracted to each other.

• Oxygen is always in a solid phase.

• The attraction between oxygen molecules is weak.

• Oxygen cannot exist in a liquid form.

Tags

NGSS.MS-PS1-4

What must happen to oxygen molecules to turn them into a liquid?

• Increase their kinetic energy.

• Increase their temperature.

• Reduce their kinetic energy.

• Separate them completely.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What phase change occurs when oxygen becomes a liquid?

• Evaporation

• Condensation

• Sublimation

• Melting

Tags

NGSS.MS-PS1-4

What is required to produce liquid oxygen?

• Heating the oxygen to a high temperature

• Cooling the oxygen to a very low temperature

• Adding water to the oxygen

• Increasing oxygen’s pressure

Tags

NGSS.MS-PS1-4

What happens when kinetic energy overcomes molecular attraction?

• A substance becomes a liquid.

• Molecules move apart, creating a gas.

• The substance freezes into a solid.

• Molecules are destroyed.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

• Why is water easier to turn into a liquid than oxygen?

• • Water molecules are larger than oxygen molecules.

• • Water molecules have stronger molecular attraction.

• • Water has no kinetic energy.

• • Water cannot exist in a gaseous form.

Tags

NGSS.MS-PS1-4

How do scientists separate oxygen from air to make liquid oxygen?

• By using heat to vaporize other gases

• By combining it with other elements

• By using machines with temperature-controlled tanks

• By increasing the air pressure

At what temperature does oxygen condense into a liquid?

• 0°C

• -183°C

• -100°C

• -50°C

Tags

NGSS.MS-PS1-4