mp3+p4g1

= = = = = = =This is Sarah, Monica, and Kristin's Wiki space=

= __Elementary Introductions__ = Hi I am Chlorine. I am most commonly found in swimming pools to kill off all bacteria. I am never found as a pure form in nature, and I form many compounds including: table salt, rock salt, and hydro-chloric acids.

Hi, I am Scandium. I am most commonly found in Euxenite and Gadolinte. I am found in atheletic equipment, and I am used to make high entensity lamps. I also form. many compounds like: Scandium Oxide, Scandium Acetate, Scandium Carbonate, Scandium Nitrate, Scandium Sulfate.

Hello, my name is Vanadium. I am most commonly found in hard steels and I am used as an alloy. I am found in nature as a mineral. Lastly, I form a compound called Sulfuric Acid. Hello there, I am Selenium. A lot of people depend on me, for their cell phones, PSPs, Lazer printers, and other electronics. I am a very pretty ruby red color or I can be a blue-metallic color. Besides being used in electronics, I can make you healthy be preventing cancer and heart disease. When I join with Sulfide, I can be used to treat your oily skin or dandruff in your hair. =__Chemistry__ =

__3/7/08__
= Here is our interpretation for our Lab Conclusion:  = When the salt dissolves in water, all bonds break. The Sodium Chloride bond breaks and becomes sodium and chlorine. Water molecules that were attracted to each other break apart. The sodium and chlorine are attracted to the water, creating a new bond. In this process, energy is absorbed and energy is released. We can measure the chemical energy, by taking the temperature. When the chemicals absorb energy, there is an endothermic change, causing the temperature to decrease. When the chemicals lose energy, there is an exothermic change and the temperature of the solution increases.

__3/6/08__ A suspension is a mixture that is not able to become a solution. The solvent is either not able to be dissolved, or the mixture is not uniform. :) = = =DID YOU KNOW?!?!?!= Did you know that colloids can be very dangerous to drivers?? If there is fog out, the fog will scatter the light from the car's headlights, making it very difficult for the driver to see. __((P.S.--->A colloid is a mixture in which the particles are dispersed throughout, but are not heavy enough to settle out. ))__

__3/6/08__ Tooday we did a lab. We added Calcium Chloride to water to see how the chemical affected the temperature. This picture shows our data in the expirement. [|calcium_chloride.JPG]

http://web.visionlearning.com/dalton_playhouse/ad_loader.html
(It is from [|www.visionlearning.com])

Scientists say the solutions are homogenus systems. This means that it is the same through out. 3/11/08
[|lab with monica and kristin.ppt]

__Constants__- the amount of water, the type of water, the temperature of the water, and the number of mixes __Procedure:__

 * 1) Measure 20 mL of water.
 * 2) Place a small amount (tip of lab scoop) of each compound in a seperate test tube.
 * 3) Add the water to a test tube and record your observations.
 * 4) Mix the test tube five times and record your observations.

__Results-__ partially dissolved specks are still at the bottom water turned blue || Partially dissolved || White || Didnt dissolve || Transparent || Didnt dissolve || clear || Disolved || Clear || Disolved ||
 * Compound || Observations || Ability to dissolve in water ||
 * Copper Sulfate || Specks are at the bottom
 * Zinc Oxide || Opaque while water with little specks at the bottom
 * Sulfer || Particles floating
 * Sucrose || Transparent
 * Sodium Chloride || Transparent

KRISTIN'S NOTES!!



3/7/08 Conclusion web for sodium chloride:

Opening Sentence A. made the water temperature go down.

Data A. Varation 1. very consistent the temperature always went down.

B. Relationship 1.As the amount of solute increased the temperature went down.

Hypothesis I thought that the temperature would go down with more solute. It was correct because the temperature went down when more solute was added.

Interpretation A. concepts 1. absorbing thermal energy causing the temperature of the water to go down 2. chemical energy and how the bonds are formed and broken B. Applying concepts 1.sodium chloride broke into sodium and chlorine. the water moleucules break apart and the sodium and chlorine moleucules are attracted to the water moleucules.

As more sodium chloride was added the temperature of the water decreased. Every time we added more solute the temperature went down not at a constent rate but it always went down.

===Energy 2-1-08 Today we did a lab that would help us determine where kinetic engery comes from when a car is rolling down a hill. ~We used a toy car and timed how long it took for it to roll down a meter stick. Here are some of the calculations that we found:=== ===|| Height of Ramp || Length of Ramp || Mass of Toy Car || Weight of Toy Car || Trial 1 || Trial 2 || Trial 3 || Average Times || || .12m || .9m || .037kg || .397N || 1.10s || 1.32s || 1.37s || 1.265s ||===

===There are many forms of energy. Which include Chemical energy, Electrical energy, Sound energy, Light energy, Nuclear energy, Kinetic energy, Potential energy, and Mechanical energy. The two main types of energy are Kinetic energy and Potential energy. Energy is the ability to do work. Work is the action that results when a force causes an object to move in the direction of the force. They are both measured in Joules. One Joule is a Newton Meter.===

======