# How Science Works - Job Interview

Discussion in 'Science' started by Davidnotmark, May 24, 2011.

1. ### Davidnotmark

Hi everyone,
I have a job interview on Thursday morning and I'm not sure if my plan is any good - could you let me know if my basic idea is ok and any advice/tips would be greatly appreciated!!
I have to teach a group of 16 year 7 pupils for 30 mins and cover How Science Works.
My idea is to split the class into groups of 2 - and ask them initially to discuss the answer to a series of questions I will give them based on the equipment I'm using for the demo - e.g. I'll hold up some equipment and they have to discuss and write down answer on mini-wb.
Then I'll present the demo - 4 test tubes with 4 diff concs of HCl and Mg strips - they are to make a prediction on a worksheet about which one will disolve the acid the quickest.
Then I want to introduce the idea of dependent and indept variable and how you'd show it on a table/graph and pupils to complete the worksheet I've provided with examples.
Plenary - mini quiz/hold up coloured answers etc (not figured it out yet)
I wonder if this is too complicated for Year 7 pupils, but I wanted to get over the idea of naming equipment and knowing the diffs betwee indep/dep variables as my outcomes!
David x

2. ### blazerStar commenter

Unless they are rotten they won't give you a difficult class. I would expect that many yr 7s could tell you about independent and dependant variables although many primaries still us 'input and output' variables!

What about giving them a sheet with a daigram of the 4 tubes. They can write on the info about the strength of acid (they won't know Molar by the way so you could use 100%, 75% etc). They they could write their prediction on the sheet. Don't use 2M acid as the Mg will float and take longer to react (it does not dissolve) than 1.5M. A 1 cm strip of Mg will take around 40 seconds or more in 0.4M acid.

If it is a mixed ability class then have some blank graphs already prepared with scales etc on so that they can plot the data.

3. ### blazerStar commenter

As there are only 16 of them why not get 4 sets of tubes made up and then they can do it themselves quickly. 1 clock per group, 1 child per tube.