Note 1.1

Water in the air

· The ice causes the container to cool.

· The water that formed on the container was in the atmosphere (air), in the form of a gas (water vapour).

· The scientific name for gaseous water is water vapour.

· Droplets of water formed on the outside of the cold container because water vapour in the air changed state to become water on the cold surface.

· The process of water vapour changing to water is called condensation.

Condensation?

Take a can of pop or jug of juice out of the fridge and let it sit on the counter for a few minutes. You may notice the condensation beginning to form on the outside of the container. Remember that the more moisture found in the air, the more condensation will be visible.

Note 1.0

Floating Ice in Freshwater

· According to Archimede’s Principle, the floating cube displaces its own weight.

· When the ice cube melts, it becomes water.

· This water has the same weight and therefore the same volume as the water displaced by the floating ice cube.

· Therefore, the level of the water should neither rise nor fall because the melted ice replaces the originally displaced water.

Floating Ice in Saltwater

· As the ice floats, it sits above the water level.

· When the ice cube melts, it becomes water.

· This water replaces the originally displaced water and the ice found above the water.

· Therefore, the level of the water may rise.

Salt water vs. Fresh water

· Both salt water and fresh water contain salt but at different concentration levels.

· The salt water of the oceans average 3.5% salt concentration and the fresh waters average less than 1%.

· The salt concentration of the water can be referred to as the salinity.

During our labs we will use the P.O.E. method:

Predict
Observe
Explain

Practice your Water Distribution Body Benchmarks!

All water
Freshwater

Gr.8 Science:

Just a reminder that we'll be starting a new unit on Water Systems tomorrow. I hope you know your ABCs...

Hello Frontenac Bisons!

Thank you for welcoming me into your school today. I will be observing the next two Fridays (Feb 27 & March 6) and begin teaching on March 11th. I look forward to being in your classroom and welcome your feedback.