Melting ice and Sea level

Bonjour readers, comment ca va?

Aim

To investigate models of polar ice melting.

1. Does ice float or sink when it melts?
2. What happens to a full plastic drink bottle containing water if it is frozen? What does this tell you about the density of solid ice compared to liquid ice (water)?
3. Do other materials behave in a similar way when they are melted or frozen? (For example, melting candle wax, setting candle wax.)
4. How much of an iceberg is above water level?
5. Why are scientists concerned about sea levels when they think about global warming?

Method

Part 1: Arctic Ice

1. Fill a 100ml beaker half-full of warm water.
2. Mark the level of the water on the side.
3. Put one icecube into the water.
4. Mark the new water level.
5. Make a prediction about what will happen as the water melts. Will the water level:
   1. Rise?
   2. Stay the same?
   3. Fall?
6. Wait for the ice to melt (we might help it melt by heating it on a bunsen).z
7. Mark the final level of the water.
8. How did your prediction compare to your measurement?

Part 2: Antarctic Ice

1. Fill another 100ml beaker quarter-full of warm water.
2. Put one metal spacer carefully into the water.
3. Mark the level of the water on the side.
4. Place one icecube onto the spacer so that it is above (and not touching) the water.
5. Make a prediction about what will happen as the water melts. Will the water level:
   1. Rise?
   2. Stay the same?
   3. Fall?
6. Wait for the ice to melt (we might help it melt by heating it on a bunsen).
7. Mark the final level of the water.
8. How did your prediction compare to your measurement?

Did the water:	Arctic	Antarctic
rise / stay same / fall?