|Lesson 8 - Water: Changing States of Matter|
|Overview:||Students will discover that water can be found on Earth in all three states of matter - solid, liquid, and gas. While investigating the water cycle, students will learn that changes in temperature causes water to change from one state to another.|
Ask students why water is important.
Have students brainstorm ways we use water. (cleaning, drinking, cooking, swimming,etc.)
Remind students that yesterday we learned that mixing matter is a physical change.
As the lemonade is being made, students will complete a pre-writing sheet which lists the materials needed and the
steps taken to make lemonade.
|Component:||Students will work at desks|
Students will observe water changing states in Changes in Ice experiment.
Once the ice experiment is set up, tell students that water is unique because it
can be found on Earth in all 3 states - solid, liquid, and gas.
Tell students that water changing from one state to another is part of the water cycle which causes rain.
Visit the following website: www.kidzone.ws/water/ to learn more about The Water Cycle. This site contains Water Cycle Activity Pages, which include suggested activities that can be done at home to demonstrate the Water Cycle.
If teachers have the new Harcourt Science textbooks available, Unit E, Ch.2, Lesson 2 - How Can Water Change? (p.E38-E43)can be read and discussed.
|Expectation:||Students will name ways that we use water.
Students will observe that water changes from one state of matter to another.
Students will describe how water can be made to change from one state to another.
Students will explain how water in all three states are a part of the water cycle.
Why do you use warm water? boiling water? cold water?
What causes ice to melt?
What causes water to boil?
What causes water to freeze?
If icicles are melting outside, what can you infer about the temperature?
What happens when water evaporates?(liquid changes into water vapor)
What helps cause water in a puddle to evaporate? (heat from the sun)
Why can't you see water vapor? (it is a gas and you cannot see it)
What makes water change its form?
|Evaluation:||Participation in discussions Completed recording sheet for Changes in Ice experiment|
|Close_Act:||Return to the ice cube experiment (Changes in Ice) and record how the ice cube has changed after one hour.|
|Hints/Tips:||Preview the Water Cycle website beforehand. You may want to print out some of the activity sheets for students to work on.|
|The Water Cycle||http://www.kidzone.ws/water/|
|Handouts, Activity Sheets, Etc.|
|changesinice.doc||Changes in Ice recording sheet (Word document)|