In this activity, students investigate the concept that air takes up space …
In this activity, students investigate the concept that air takes up space by experimenting with a tub full of water and an empty cup. Students turn the cup upside down and lower it into the water so that they can observe what happens. Students also try this with a crushed paper towel inside the cup to illustrate that the air prevents water from entering the cup.
Students will be able to explain, on the molecular level, how a …
Students will be able to explain, on the molecular level, how a gas dissolves in water. They will also be able to explain why the gas comes out of solution faster in warm water than in cold water.
Students will place isopropyl alcohol, mineral oil and corn syrup in water …
Students will place isopropyl alcohol, mineral oil and corn syrup in water to see if any of these liquids dissolve in water. Students will extend their understanding and definition of "dissolving" and see that certain, but not all liquids can dissolve in water.
Students will be able to identify and control variables to design a …
Students will be able to identify and control variables to design a test to see if heating water affects the rate of evaporation. Students will be able to explain, on the molecular level, why adding energy increases the rate of evaporation.
Students will mix ice and salt in a metal can to make …
Students will mix ice and salt in a metal can to make it very cold. They will see the liquid water and ice form on the outside of the can. Students will watch an animation of water molecules arranged as ice.
This resource is a video that demonstrates the effects on various objects …
This resource is a video that demonstrates the effects on various objects when they are placed in liquid nitrogen. The video accompanies the lesson plan, "Changing State - Freezing."
This resource is a video that shows the difference in melting rates …
This resource is a video that shows the difference in melting rates between a regular ice cube and a piece of dry ice. The video accompanies the lesson plan, "Changing State: Melting."
This resource is a video that compares the reaction when dry ice …
This resource is a video that compares the reaction when dry ice is placed in cold versus hot water. The video accompanies the lesson plan, "Changing State: Melting."
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