Year 7 tests marked - moving to next topic

Year 7 tests showed good general understanding mainly but many of your longer answers (question 9) were far too short to get you the marks.

You'll get those back on Monday, we'll check books over and move onto chapter 7H - Solutions, so if you want to read up about them then feel free.

The Kinetic Theory and Atraction

Today in class we've talked a lot about forces between particles, states of matter, and other stuff like that.

We started talking about some vanilla candles, Andy had on a chair. Why did the room smelt with vanilla? We all said: The candles! But why? Diffusion is a great thing that happens with all of the things. The diffusion starts were all the particles are more concentrated (solid) and ends were the particles are less concetrated (the air at a corner of the room, for example).

Then we talked about the kinetic theory. You may ask: What's that? Well, it is a very important thing all people should know. The kinetic theory, refers to the "movement" of particles in solids liquids and gases.

In a solid the forces of attraction between particles are very strong, keeping the shape rigid.

These forces are weakened in a liquid, so their structure is not a regular arrangement.This means that liquids can take the shape of any container they are in.

The forces of attraction between particles in gases have been overcome as the particles have more energy. This means that a gas does not have definite shape.

Homework reminders

Homework set today was:

7A and 7J - Not really homework because it counts towards your experimental mark at the end of the year so it must be completed. Write up the egg-speriment, complete with observations, explanation, and conclusion. A reminder of what these are all about are in Pablo's post below. This is to be written up to hand in for the lesson next week same time (Tuesday's lesson). NO Web team exemption, everyone must write up experiments in their books.

8P - One element from the periodic table, but NOT the same one as someone else. Make a poster A4 size to form a LARGE periodic table on my ceiling. Check Hugo's post below to make sure that you and other people are not doing the same element. Web team you may do yours on the web but that won't help to decorate my ceiling will it...

8C - P65, Q1-4 for collection on Friday to be marked over the weekend. There goes my chances of having any fun this weekend. Web team exemption if work posted of a similar nature on the web by Friday.

9S - Finish off funky pH scale for next lesson, web team exemption if work posted on the web before friday, including Ana and the photography team.

9P - P65, Q1-4, collection Friday. Web team exemption if similar posted on the web by friday

Y10 - For failing to attain all the objectives in yesterdays lesson you will be set additional homework in tomorrow's lesson

Y11 - Finish up those calculations for tomorrow, where I will try to melt a piece of wire using a slinky spring and a power pack. Calculations important and therefore no web team exemption.

No excuses guys and girls you've been reminded.

Funny web page!

I've found a link were you can find interesting experiments about all types

of things:

http://www.megatrix.es/megatrix/web/html/momentos/ranking_videos.htm?id=396

Here is another page about experiments(sorry, it is in spanish)

http://www.cientec.or.cr/ciencias/experimentos/fisica.html#57

Today we've done an experiment about an egg.

You put alcohol inside a glass bottle and light it, and

then you put an boiled egg on top...

Result:

The egg goes down. It is very funny, but everything has a reason...

Y7J´S SCIENCE

Today in class we did the particle model of evaporation .It is very simple: liquids don´t need fire or very high temperatures .Water can change form to gas in any temperature ,wind helps the evaporation.
Then we did an experiment ,one kid kindly offered himself to do it . It was like this:he poured some water in his head and in some minutes ,it evaporated .
At last ,we learned the words of a scientist that explained what is an atom and said us much more things : "All the things are made of atoms-Little particles that move arround in perpetual motion ,attracting each other when they are a little distance apart and repelling each other when they are sqeezed together".

Science Y7J

Today we have done so much things I really can't remember every single detail.

At first we did again particle models. This time of evaporation. In generaly we did it quite good.

Then we talked about particles and their importance to science. We talked also about what statment in science conatains the most information in the fewest words. Here you have it:

"All things are made of atoms-little particles that move around in perpetual motion, attracting each other when they are a little distance apart, and repelling each other when they are squeezed together."