Difference between revisions of "3-FAM-06"
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* Pupils are given a range of water samples and are asked to determine which sample is ‘contaminated’ | * Pupils are given a range of water samples and are asked to determine which sample is ‘contaminated’ | ||
* Find the boiling point of water samples (one distilled water/ other will salt added) | * Find the boiling point of water samples (one distilled water/ other will salt added) | ||
| + | |||
| + | ==Plenary== | ||
* Pupils watch a demonstration of the forced evaporation of ether that causes water to freeze; a discussion should follow | * Pupils watch a demonstration of the forced evaporation of ether that causes water to freeze; a discussion should follow | ||
| Line 33: | Line 35: | ||
===Safety/Hazards=== | ===Safety/Hazards=== | ||
| − | * | + | * Pupils should not sit down whilst performing this experiment |
| + | * Pupils must wear goggles and have their hair tied back and ties tucked away | ||
| + | * Pupils should be told what to do if they get burnt | ||
===Notes=== | ===Notes=== | ||
Revision as of 12:57, 16 February 2010
Contents
Outcomes
- Pupils should understand that in order to form vapor, the molecules of the liquid must overcome the forces of attraction between them.
- Pupils should know that the temperature of a boiling liquid remains constant, even when more heat is added.
- Pupils should understand the process of Evaporation and how it is used for cooling in a range of applications
Specification References
- 5.10 Understand that a substance can change state from liquid to gas by the process of evaporation or boiling.
Starter
- Using a cotton wool swab, place a drop of ethanol on the back of one hand and a drop of water on the other and discuss the feeling and the causes of it.
Main Body of Lesson
- Pupils are given a range of water samples and are asked to determine which sample is ‘contaminated’
- Find the boiling point of water samples (one distilled water/ other will salt added)
Plenary
- Pupils watch a demonstration of the forced evaporation of ether that causes water to freeze; a discussion should follow
Homework
- Plot graphs and discuss + identify contaminated water sample.
- Extension – Research -Why is the boiling point different?
Additional Information
Resources Required
- Bunsen burner kit, beakers, thermometers, samples of distilled and contaminated (salt) water
Textbook References
- Physics for you pg. 55-59
Website References
Skills Addressed
- Observations and Inferring
- Collecting data and plotting graphs
Safety/Hazards
- Pupils should not sit down whilst performing this experiment
- Pupils must wear goggles and have their hair tied back and ties tucked away
- Pupils should be told what to do if they get burnt
