Speed, Velocity, and Acceleration

Hi folks!

Thus far we have been learning about scalar and vector quantities.  The scalar quantities that we have described are distance and speed.  The vector quantities that we have described at displacement, velocity, and now acceleration.  Remember in all vector quantities direction plays a very important role!  In order to communicate direction we have used points on a compass (NSEW), and positive and negative integers.  Remember, negative integers usually imply an opposing direction.

To recap what we have learned about these concepts and for a brief introduction to acceleration, please check out this video!

Also, another good (and very cute) introductory video to acceleration can be found here.  You won't regret watching this one!

Enjoy!

Ms. Camille

Balancing Chemical Equations

Here is a video to refresh your memory:

http://www.youtube.com/watch?v=YAutl-G7g4A&feature=related

Here are some websites to practice your skills!

http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm
http://education.jlab.org/elementbalancing/index.html (Choose a level that reflects your confidence with this topic)

Naming Acids

Hi guys,

Sorry for the hiatus from the internet!  I hope you all had a lovely Eid holiday.  Can you believe that there are only 4 weeks left until the winter holidays?  I'll be posting as many resources as I can find that will help you with your upcoming Unit Final.  Don't forget, it's coming up on November 30!

Here is a YouTube video from Brightstorm2 about naming acids.  It goes over the same rules that we did!

http://www.youtube.com/watch?v=wBRU6gOlq5o

Also, you may want to check our BrightStorm2's other videos about naming ionic compounds and molecular (covalent) compounds.

I hope it helps!

Ms. Camille

Ionic Compounds

What I need to know about ionic compounds:

• Formed between metallic and non-metallic elements
• Electrons are transferred  from the metal to the non-metal.  This only happens between the valence energy shells (outer orbitals) of the atoms.
• When this occurs, both atoms become ions (charged)
• The metal, having lost negative electrons, is now positively charged and is called a cation.
• The non-metal, having gained negative electrons, is now negatively charged and is called an anion.
• These ions will combine in proportions that allow the metals to give away all their unpaired electrons and the non-metals to acquire a full octet of electrons.

Extra reading:

• Ions: http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/atomic/ionicrev1.shtml
• Ionic Bonds: http://www.teachersdomain.org/resource/lsps07.sci.phys.matter.ionicbonding/
• Chemical bonds: http://www.teachersdomain.org/resource/lsps07.sci.phys.matter.chembonds/
• Chemical bonds: http://www.visionlearning.com/library/module_viewer.php?mid=55

Just to get us started...

Below is a great website that provides a basic overview of the concepts we will be learning about in this next section.  Make sure you look at the section called "Atomic Basics".

http://www.learner.org/interactives/periodic/index.html

Also, make sure you comment on my welcome message below if you haven't done so already!