1. Investigation 2 Part 2: Sinking and Floating Water 1 SWI2P2

2.  What happens to water when heat is added or taken away? 2SWI2P2

3.  The difference between the density of hot water and the density of cold water. 3SWI2P2

4.  Denser – the molecules of an object are closer together.  Less Dense – the molecules of an object are not as close together.  Everything in the world is made up of molecules. How close together the molecules are determine the objects density.  I now pronounce that all of you are molecules!  Stand up! 4SWI2P2

5.  Sink – an object goes to the bottom of a container of liquid.  Float – an object lays on the top of a liquid. 5SWI2P2

6.  What will happen when you drop a rubber stopper in the cup of water?  A wooden bead?  A cork?  A penny? 6SWI2P2

7.  If an object floats in water, the object is less dense than water.  If an object sinks in water, the object is denser than water.  Which objects are less densethan water?  Which objects are denser than water? 7SWI2P2

8.  What do you think will happen if you put hot water in a container of room-temperature water? 8SWI2P2

9.  Getters need to get a tray with a small vial, a craft stick, and a rubber band.  Starters will get the cup of water.  The Encourager will assemble the vials on the sticks and practice lowering the empty vial into the cup.  The teacher will fill the vial with hot water that has been dyed red. 9SWI2P2

10.  What happened to the hot water in the vials?  Why do you think this happened? 10SWI2P2

11.  What do you think will happen if you put cold water in a vial and lower it into a cup of room-temperature water? 11SWI2P2

12.  Getters need to get a tray with a small vial, a craft stick, and a rubber band.  Starters will get the cup of water.  The Encourager will assemble the vials on the sticks and lower the cup into the water.  The teacher will fill the vial with cold water that has been dyed blue. 12SWI2P2

13.  What happened to the cold water in the vials?  Why do you think this happened? 13SWI2P2

14.  Which water was denser than room- temperature water?  Which water was less dense than room- temperature water?  Which is denser, hot water or cold water?  Why do you think so? SWI2P214

15.  Record your observations on the Sinking and Floating Water worksheet. SWI2P215

16.  Denser – the molecules of an object are closer together.  Less Dense – the molecules of an object are not as close together.  Everything in the world is made up of molecules. How close together the molecules are determine the objects density.  I now pronounce that all of you are molecules!  Stand up! 16SWI2P2

17.  Sink – an object goes to the bottom of a container of liquid.  Float – an object lays on the top of a liquid. 17SWI2P2

18.  Is hot water denser or less dense than room- temperature water? How do you know?  Which is denser, hot water or cold water? How do you know? SWI2P218