Hydrogen peroxide

Next week we are going to be doing two different practicals which are part of Chemistry.  The first one will use hydrogen peroxide, and the second one will use detergent (among other things).  For today, try and find the following information on these chemicals:
For Hydrogen peroxide:

1. Its chemical formula.
2. What properties it has and what it can be used for.
3. Why it occurs in the body.
4. How it is broken down and what the products are.

For detergent:

1. The main chemical that makes it up.
2. The different characteristics of the two ends of the molecule.
3. How it cleans oil or food off dishes.
4. What forces occur between molecules in a bowl of water.

Some websites to give you a hand:
http://www.madsci.org/posts/archives/1999-09/938519528.Bc.r.html - info on hydrogen peroxide.

http://en.wikipedia.org/wiki/Hydrogen_peroxide - structure and formulas.

http://www.google.co.uk/imgres?imgurl=http://www.chemistryland.com/CHM107/Water/Soap02.jpg&imgrefurl=http://www.chemistryland.com/CHM107/Water/WaterQuiz.html&h=358&w=500&sz=36&tbnid=sOTCFK3LGgzENM:&tbnh=93&tbnw=130&prev=/search%3Fq%3Dsoap%2Bmolecules%26tbm%3Disch%26tbo%3Du&zoom=1&q=soap+molecules&hl=en&usg=__o0cJB9QQUBgI4mOIVgz4-1dDy0w=&sa=X&ei=RakWTq33GtC4hAewrcnMBQ&ved=0CCMQ9QEwBA - Information on what detergent does in water.

Finally....
Complete this crossword, trying to keep cheating at a minimum! (Sami).  http://www.creative-chemistry.org.uk/funstuff/xword/rates.htm
Once you're finished, have a look at this website - http://www.canaryzoo.com/Chemistry%20Games.htm

Animal testing

Following on from the milgram experiment we saw last week, we're going to look at ethics today.  Here's the  video from last week if you want a refresh:

This experiment places stress on the people involved, and so raises issues about whether it is wrothwhile.  Animal testing is another area that raises a similar issue.

Task for today: Use the following links to find out more about the animal testing issue, then answer the questions here in your books:

1. Explain why animals are used in research
2. Are animals treated cruelly in research? Do they suffer? Describe any suffering they may go through.
3. Name some products/materials that have been developeed using animal testing.
4. Decide whether you support animal testing or not, and explain why.  Make sure you justify your stance!

http://news.bbc.co.uk/1/hi/uk/4767875.stm  :    RECENT NEWS INFO

http://www.bbc.co.uk/science/hottopics/animalexperiments/    VIEWPOINTS

http://news.bbc.co.uk/cbbcnews/hi/find_out/guides/animals/animal_testing/newsid_2149000/2149767.stm                         NEWSROUND – CHILD FRIENDLY INFO    

http://www.pro-test.org.uk/               THE PRO USE OF ANIMALS GROUP

http://www.thebodyshop.com.au/ourValues.cfm?valueID=1  BODY SHOP VIEWPOINT

http://www.buav.org/                                   ANTI ANIMAL TESTING GROUP



I.T. lesson

This morning we will be doing some research for a prac experiment we will be doing next week.  You will need some background information that you will collect today, and after planning the experiment tomorrow we will be ready for next week.
The experiment will be investigating how much juice we can get from a certain amount of apple using enzymes.
Use the internet to find answers to the questions on your sheets, this link may be useful if you're stuck:
http://www.sciencebuddies.org/science-fair-projects/project_ideas/BioChem_p010.shtml

This one is a page from bitesize giving some information about enzzymes:
http://www.bbc.co.uk/schools/ks3bitesize/science/organisms_behaviour_health/diet_drugs/revise5.shtml

Last of all, try any of the activities on this page:
http://reviewgamezone.com/game.php?id=196

Make sure you keep your sheets to refer to tomorrow.

Moments

Here are some slides that we used when we were looking at moments.  The two slides at the end are saying that if the two opposite moments are equal the see saw won't move.  This means that two different weights can be put at different distances from the pivot and balance.
https://docs.google.com/leaf?id=0BzFUvVu_WNI_NTVjNGQ1ODEtYzNlZi00NDQ4LWJmMzktOGNiNDk1ODc0MjYx&hl=en&authkey=CNX8n74D

Alterations

I'm not sure why little bits of text keep getting changed around, but for the first example you're trying to find the pressure, which is f divided by a ( or 10 N / 5cm squared), which equals 2 N/cm.  This should help you work out the later questions.

Pressure in Fluids

https://docs.google.com/leaf?id=0BzFUvVu_WNI_Yjg4NTU5N2UtNWNmMC00OTc3LWEzNmEtMzFhOTQzY2M3OWRl&authkey=CNrI0bwE&hl=en

This is the link to the slideshow that we used today.  Remember that pressure = force x area, and then use the worked example on the slide to try the summary questions at the end.  We won't have another lesson until next Tuesday so make sure you have a go at this in the meantime!

Moments

We started pressure and moments today, and completed a practical on moments.  You need to remember that a moment is the turning effect of a force, and can be calculated by using the formula:

moment (Newton meters) = Force (newtons) x Distance from pivot (meters).

 So to lift or move something thats heavy using a lever you can either use more force or lengthen the distance between teh force (where you are pushing) and the pivot.  Tomorrow we will be using this to cover more material so make sure you know how to use the equation.

Gravity and Space

Now that we've finished the Gravity and Space section, I thought I'd put up a list of keypoints that you should know for the test at the end of the week:

1. Gravity is a force that exists between any two objects that have mass and aren't in contact. 
2. Mass is measured in kilograms and is the same everywhere in the Universe, weight is measured in Newtons and changes depending on the strength of Gravity.
3. Two types of satellites exist - Polar orbit which can be used to track weather systems or for mapping, and Geostationary which can be used to transmit TV and other signals.

Revision video

I know that we've finished the patterns of reactivity section, but I found this and thought it might be useful revision for any tests that we might have coming up (hint!).  We'll talk about it in class and have time for revision, but in the meantime watching this might help you:

Here is the link for the start of the space and gravity unit we did today:
https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BzFUvVu_WNI_NzQ2ZWY5OTUtZWNiMy00NjgzLWJiOTEtZDcyZmZkZGZhNDMw&hl=en
I'm not sure why the last slide doesn't read properly, it was meant to be the table of the differences between mass and weight.  If you can't remember these, look back through the earlier slides to help you with definitions.

https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BzFUvVu_WNI_NTE0NDFhNTAtYjY0My00ZWZjLTkwZWMtZjIxNWFhNmY1ZDQx&hl=en
This is the link for the Patterns of Reactivity topic we started today, so make sure you understand what was covered.  I also included some more questions for a Year 8 class, so taking a look at them would be useful too (on the second slide).

Metals

As we talked about we've finished the unit on Plants for Food, and will be starting on a new Unit looking at patterns of reactivity tomorrow.  Try and remember to bring your planners to class as we will be using the periodic table in the back, and if you have any spare time try and learn the symbols of some metals you have heard of (copper, metal, magnesium, iron, sodium, potassium)

This is the video that we watched during the pesticides lesson last week.  It may be useful for your leaflets, and remember that DDT is a good example of a pesticide being dangerous to many other organisms aside from pests.

This is the link to the powerpoint we used to make our leaflets on pesticides today: https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BzFUvVu_WNI_ZGIzZGJkMGQtYzhjNy00YjU2LTliOGYtNDljYjZjMjVkOTFk&hl=en
You should keep your finished leaflets in your book as they will be useful for revision.

Week 8

Welcome back, here is the link to the video we watched in class today.  Remember that we need to know what the plants get from the insects, and the other way that they can absorb this material.
If you have time, do some research to find out what plants need phosphorus and potassium for.  We will also be looking at fertilisers and pesticides in more detail later this week, so defining them would be useful as well.

Welcome!

Hello Year 9, I've just put this together so I can share notes with you all and post different things to help with the course.  Make sure you put the address in your favourites or somewhere safe so you can check in regularly.