Friday, 15 March 2013

Using Youtube to write a procedure- Dry Ice

Youtube is a great way to get your students write a procedure for a science experiment. This text type is particularly useful in science.

There are some great experiments, including ones that are too dangerous to do in real life but are interesting and relevant to the curriculum.
For instance this on demonstrates sublimation, where a solid become a gas without becoming a liquid;
http://www.youtube.com/watch?v=76CNkxizQuc

I would definitely not use dry ice with students because its dangerous, causing a severe cold burn if handled. So using technology makes sense.
The presenter tells the audience what to do step by step, so you can get your students to  write a procedure, by showing them the clip a few times.
If you copied it for the students, they can work at their own individual pace to get down the steps.
Here are the BOS outcomes where this experiment would be useful:

Stage 1 outcomes
 
A student:
Stage 2 outcomes
 
A student:
Stage 3 outcomes
 
A student:
ST1-12MW
identifies ways that everyday materials can be physically changed and combined for a particular purpose
 
 
 
ST1-13MW
relates the properties of common materials to their use for particular purposes
ST2-12MW
identifies that adding or removing heat causes a change of state between solids and liquids
 
 
 
 
ST2-13MW
identifies the physical properties of natural and processed materials, and how these properties influence their use
ST3-12MW
identifies the observable properties of solids, liquids and gases, and that changes made to materials are reversible or irreversible
 
ST3-13MW
describes how the properties of materials determine their use for specific purposes

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