Grade level: 3
Time: 40 minutes
Purpose:
Students will construct a mobile that shows the progression of water through its phases- solid, liquid, and gas. On the back of the mobile: students will name these phases, write the name of the process needed to change phases, and write three facts about that phase. This activity fits into the Washington State Essential Academic Learning Requirements (EALRs) for water and weather in third-grade science.
Materials: (this is enough for 20 lesson plans)
For the beginning: an ice cube, a cup of water, and a Ziploc bag of air.
For the lesson: 20 metal coat hangers, 60 yarn strands, 30 pieces of paper, scissors, watercolor paints, and a hole punch. If available, read The Magic School Bus: Wet All Over to introduce the water cycle in more depth.
Procedure:
1. Look at the ice, water, and bag of air. What do they all have in common? It’s water in all three phases. In the environment, water moves through all three of these phases and that’s called the water cycle.
2. Water may start as snow, which is frozen crystals of water, on a mountain and melt into a stream. The stream could run down to a lake and on a hot day, the sun could excite a water molecule and cause it to evaporate.
3. Stress that evaporation is the process of water moving from a liquid to a gas. Show the students the water in the cup and the bag of air to show the difference.
4. That water that evaporated from the lake to the air now can change back into a liquid in a process called condensation. The sun’s heat made the water excited enough to evaporate, so as the air gets colder around the water, it turns back into a liquid. This is called condensation.
5. This liquid water stays in the cloud and can go back to that same mountain, freeze, and snow down again.
6. This concept is called the Theory of the Conservation of Mass- all the water is conserved, or kept, in every phase change.
7. Now you guys can make your own mobile of the water cycle. Start with the snow and label the back with the phase change that takes it to liquid water. (Remember what that’s called when the water moved from snow to the stream? Melting.) To make the snow, use one piece of paper and make a paper snowflake.
8. Now do the same for liquid form and gas forms. Use a piece of paper and cut out a water drop for liquid. Use a piece of paper and cut out a cloud for the gas form.
9. After you finished painting the pieces and labeling them with the phase, the process to change phases, and some facts, hang them on your coat hanger with the yarn.
10. Now you have a mobile about the three water phases and some scientific terms to remember them!
Time: 40 minutes
Purpose:
Students will construct a mobile that shows the progression of water through its phases- solid, liquid, and gas. On the back of the mobile: students will name these phases, write the name of the process needed to change phases, and write three facts about that phase. This activity fits into the Washington State Essential Academic Learning Requirements (EALRs) for water and weather in third-grade science.
Materials: (this is enough for 20 lesson plans)
For the beginning: an ice cube, a cup of water, and a Ziploc bag of air.
For the lesson: 20 metal coat hangers, 60 yarn strands, 30 pieces of paper, scissors, watercolor paints, and a hole punch. If available, read The Magic School Bus: Wet All Over to introduce the water cycle in more depth.
Procedure:
1. Look at the ice, water, and bag of air. What do they all have in common? It’s water in all three phases. In the environment, water moves through all three of these phases and that’s called the water cycle.
2. Water may start as snow, which is frozen crystals of water, on a mountain and melt into a stream. The stream could run down to a lake and on a hot day, the sun could excite a water molecule and cause it to evaporate.
3. Stress that evaporation is the process of water moving from a liquid to a gas. Show the students the water in the cup and the bag of air to show the difference.
4. That water that evaporated from the lake to the air now can change back into a liquid in a process called condensation. The sun’s heat made the water excited enough to evaporate, so as the air gets colder around the water, it turns back into a liquid. This is called condensation.
5. This liquid water stays in the cloud and can go back to that same mountain, freeze, and snow down again.
6. This concept is called the Theory of the Conservation of Mass- all the water is conserved, or kept, in every phase change.
7. Now you guys can make your own mobile of the water cycle. Start with the snow and label the back with the phase change that takes it to liquid water. (Remember what that’s called when the water moved from snow to the stream? Melting.) To make the snow, use one piece of paper and make a paper snowflake.
8. Now do the same for liquid form and gas forms. Use a piece of paper and cut out a water drop for liquid. Use a piece of paper and cut out a cloud for the gas form.
9. After you finished painting the pieces and labeling them with the phase, the process to change phases, and some facts, hang them on your coat hanger with the yarn.
10. Now you have a mobile about the three water phases and some scientific terms to remember them!
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