Matter Moving Between Systems - Lessons 4-6 [A]

What is the smallest particle of water called?

• Molecule

• Atom

• Ion

• Compound

What happens to water molecules in liquid form over time?

• They evaporate into gas.

• They freeze into solid.

• They remain unchanged.

• They dissolve into other substances.

When we place a lid on our cup, it becomes a (a)   system. (open/closed)

• Open

• Closed

What process allows water particles to turn into gas and go into the air?

• Evaporation

• Condensation

• Precipitation

• Sublimation

True or False: Water droplets forming on the outside of a cup come from the air inside the cup.

• True

• False

Why does a cup with a lid help keep a hot liquid warm for a longer time?

• It prevents the liquid from evaporating.

• It allows the liquid to cool down faster.

• None of the above

• It increases the rate of matter loss from the system.

What is the process called when water molecules in liquid form turn into a gas?

• Condensation

• Evaporation

• Sublimation

• Fusion

Where do the water droplets forming on the outside of a cup come from?

• The inside of the cup

• The air outside the cup

• The lid of the cup

• The straw hole of the cup

What type of system is created when a lid is used on a cup?

• An open system

• A closed system

• A semipermeable system

• A pressurized system

What is the difference between a gas and a liquid?

• Gas particles are closer together than liquid particles.

• Gas particles have a lower temperature than liquid particles

• Gas particles are larger in size than liquid particles.

• Gas particles have more space between them.