Change of State
Take 1 litre of water, freeze it to make ice. When the state of matter
changed, was there any change in Volume? How to find this?
Prepare a report based on the experiment.
Answers
Answer:
Key Concepts
Freezing is the process that causes a substance to change from a liquid to a solid.
Freezing occurs when the molecules of a liquid slow down enough that their attractions cause them to arrange themselves into fixed positions as a solid.
Summary
Students will mix ice and salt in a metal can to make it very cold. They will then see liquid water and ice form on the outside of the can. Students will watch an animation of water molecules arranged as ice.
Objective
Students will be able to explain on the molecular level why a low enough temperature can cause the water vapor in air to condense to liquid water and then freeze to form ice.
Evaluation
Download the student activity sheet, and distribute one per student when specified in the activity. The activity sheet will serve as the “Evaluate” component of each 5-E lesson plan.
Safety
Make sure you and your students wear properly fitting goggles.
Materials for Each Group
Empty clean metal soup can
Salt
Ice
Metal spoon or sturdy stick
Teaspoon
Paper towel
Materials for the Teacher
Pliers
Duct tape