Pd+3+Group+2

Marking Period 3

3/25/11

2/23/11 Let's see the how elements afffect are body

media type="custom" key="8465186"

2/17/11 Summary Elements are sometimes friends because they help nourish the body, but some can be enemies because too much of a good element can be harmful, and some just are deadly and toxic right off the bat.

1/31/11
 * __Movie Notes__**
 * Notes on Atoms and Elements and Compounds **


 * Pure substance is matter made of one kind of material with definite properties
 * Elements is simple pure substance and can’t be made into a more simpler substance
 * All matter made of atoms
 * Below are rules of atomic theory
 * 1.Made of parts all matter is made of atoms that can be combines
 * 2. Atoms of the same elements are exactly alike (not true all the way)
 * 3. Atoms of different elements are completely different
 * 4. Atoms of two or more elements can be combined to form new substances
 * J. J. Thomson: late 19th century scientist who stated atoms were not simple solid spheres
 * Particles repel each other so that things don’t go through each other
 * Electrons can move around
 * New theory is Electron cloud mode

In the lab, the mystery object was a wooden parrallelogram. Whenever we would hit it with a marble it would always bounce off at an angle. On the flat sides it would bounce left or right, but on the slanted side it always went the other way. Here are pictures of our comic strip

media type="custom" key="8281100"

Here are the results from our Electron Cloud Lab

Conclusion 1. You could not predict the area that the pencil would fall. 2. Yes you could predict the general area the pencil would fall by tracing its path straight down from its eyes 3. 3 and 4 had the most hits 4. They are made of the same electrons but there are millions of them.



Marking Period 2 Density Lab

By: Abbey and Lauren
Comics on Energy Transfers

Question

 * How does the density of water compare to the other densities of liquids and solids?

Hypothesis

 * The object with the most mass, such as the marble, will be more dense than water.

Varibales

 * Independent variable- the type of liquid or solid
 * Dependent variable- density
 * Constants/Controls- amount of water, the temperature, and the procedures

Results

 * = Variables ||= Trial 1 ||= Trial 2 ||= Average ||
 * = Water ||= 0.9986 g/cm3 ||= 0.9984 g/cm3 ||= 0.9985 g/cm3 ||
 * = Methanol ||= 0.85428547 g/cm3 ||= 0.85428547 g/cm3 ||= 0.85428547 g/cm3 ||
 * = Corn Syrup ||= 1.2234615 g/cm3 ||= 1.225346 g/cm3 ||= 1.22442 g/cm3 ||
 * = Marble ||= 2.65 g/cm3 ||= 2.65 g/cm3 ||= 2.65 g/cm3 ||

Analyze the results

 * The marble has the most density, and is denser than water
 * The methanol has the least, and is less dense than water

Why is 11 percent of an iceberg above the water?
Here is a link to the website we used to get information: []



The reason for the iceburg to have 11% of itself above water is due to density. The snow on the top has a lighter density and therefore does not sink, whereas the solid ice has a much larger density and will sink below the water, since it is denser than the water.

Boiling Water Experiment
Question- How does t Hypothesis-



This is an endothermic change, which means that energy was absorbed in the heating of the water