Evaporation and Boiling: Compare and Contrast

Do you know the similarity and differences between evaporation and boiling?

Molecules in Motion

Three states of matter

Do you know how do the molecules behave in solid, liquid and gas?

Temperature vs Heat

This is for the benefit of those who were not around when I showed this in 3H today. Please thoroughly read your notes on Heat Capacity + Specific Heat Capacity. Do look for me at Staffroom 2 if you have any difficulties. This offer is valid till 7 May 2010.

Give your ice a lift

Explanation:

Salt is sprinkled around the thread/stick and salt water has a lower melting or freezing point than pure water. The ice cube melts at the places where salt is sprinkled. Temperature of this water above the ice cube is below 0°C.

When salt dissolves in more of the melted ice, the solution gets more diluted, increasing the freezing point closer to 0°C. As the water has temperature a few degrees below 0°C, it freezes again.

Firewalking

This is good to know, but please do not try this yourself!



Read more about it here: How can you walk across hot coals?