Conservation of Mass 5th Grade

During a science experiment, Noah observed a puddle of water disappearing on a sunny day. What is the process called when a liquid changes into a gas?

• Evaporation

• Condensation

• Freezing

• Melting

During a science experiment, Zoe observed water droplets forming on the outside of a cold glass. What happens during condensation?

• A liquid changes into a gas

• A gas changes into a liquid

• A solid changes into a liquid

• A liquid changes into a solid

Hannah left an ice cube on the kitchen counter. Which process involves the ice cube turning into water?

• Melting

• Freezing

• Sublimation

• Deposition

What is the process called when a solid turns directly into a gas without becoming a liquid first?

• Sublimation

• Deposition

• Melting

• Freezing

What is the main purpose of the "Phase Changes in a Bag" investigation?

• To explore if mass is gained, lost, or conserved when matter changes states.

• To see how fast ice can melt in different conditions.

• To measure the temperature of ice and water.

• To find out how much air can be trapped in a bag.

Why do scientists often use closed systems to experiment or test hypotheses?

• To allow external variables to affect the results

• To prevent outside variables from affecting the experiment/results

• To make the experiment more complex

• To increase the weight of the system

What analogy is used to help explain the concept of open and closed systems?

• A garden outside and a terrarium

• A forest and a desert

• A river and a lake

• A mountain and a valley

During a science experiment, Ethan and Ava observed a block of ice melting. What is conserved during this phase change?

• Volume

• Temperature

• Mass

• Density

What type of change(s) did we see during today's investigation?

• Physical

• Chemical

• Biological

• Nuclear

What is the process called when a gas turns into a solid?

• Deposition

• Sublimation

• Melting

• Evaporation