Pd+1+Group+4

Marking period 3 =media type="custom" key="8476644"**Boat Race**= -Shapes- Circle and a Triangle -

Charge: positive Mass : 1 amu Location: nucleus Charge: none Mass: 1 amu Location: nucleus Charge: negative Mass: amost zero Location: electron clouds Invitation- Come to the science history fair where learn about the indirect observations of atoms. We have food games and awesome decorations.
 * Electron cloud[[image:electroncloudgraphg4kalsia.jpg width="419" height="355"]]**
 * Vocabulary**
 * Inside the nucleus**
 * Protons:** are the positively charged particles of the nucleus
 * Neutrons:** are the particles of the nucleus that have no charge
 * Outside the nucleus**
 * Electrons**:are the negatively charged particles found in the electrons cloud
 * More Vocab!!!!!!!! :D**
 * Atomic number:** The number of protons in the nucleus of an atom
 * Atomic mass unit(amu):** The SI unit used to express the masses of particles in the atom
 * Atomic mass:** Is an average of the masses of all naturally occuring isotpes of and element.
 * Mass number:** The sum of the protons and neutrons in an atom
 * Atomic Party**
 * 2-7-11**

Erwin Schrödinger and Werner Heisenberg arrived with cake in hand to share with everyone at the party the candle showing the nucleus and the layers representing the electron clouds. When they entered the room they saw everyone already inside decorating. Bohr hanging streamers on the wall to show his discovery of electron paths and Thomson scattering confetti on the ground to show atom can be divided. They also saw Rutherford putting glow sticks in the party favors to show how when the atoms hit the sides of the foil paper they glow. They also saw Dalton struggling to hang up the disco ball to show how he thought atoms were hard round objects. Schrödinger went to help Dalton with the disco ball while Heisenberg went to set up the fog machine to represent electron clouds. Democritus was at the buffet table setting up silver plates and knives to represent the coin he kept cutting in half until it was indivisible. After the disco ball was hung everyone went to put they food they brought on the buffet table. Democritus brought Hershey kisses because the silver wrapping reminded him of his coin and Dalton brought skittles to show that atoms of the same elements are exactly alike and atoms of different elements are different the colors mixing together represented his theory. Thomson brought Chocolate chip ice-cream to show his plum pudding model. Rutherford brought bake potatoes because when he baked them in foil it reminded him on the gold foil he used to find out what the dense part of the atom was the nucleus. Bohr brought candy necklaces to show his discovery of the electron paths and Schrödinger and Heisenberg put their cake on the table also. Before eating all the food the scientist decided to play a few games to remember each other. To remember Democritus everyone decided to play a dinosaur puzzle because they studied dinosaurs indirectly and they also studied atoms indirectly. For Thomson they played Taboo because his name started with a T also bohr brought balloon pop because his name started with a B. Rutherford played ring around the rosy because it was his favorite game. Dalton liked play duck duck goose because it reminded him of his favorite animal. Lastly Schrödinger and Heisenberg liked playing two truths and a lie because they were the two modern scientists. In the end the party was a hit. All of the scientists were exited to learn about the past and modern research of atoms.

1-28-11 · ** Atom- the smallest piece of matter that cannot be commonly broken down ** · ** Nucleus positively charged center of atom **
 * Atoms**
 * · Pure substance- is matter made up of one kind of material with definite properties **
 * · Element- a simple pure substance that cannot be changed into a simpler substance (aluminum) **
 * · All objects are made up of matter **
 * · Each electron has a fixed amount of energy **
 * · When farther away from the nucleus they have more energy **
 * · Compound is a pure substance that is made up of one or more elements **

Marking Period 2 Group Members: Halie, Kayla,Alysia Denstity of liquids: For our experiment we tested the density of three different liquids. The liquids we tested were water, rubbing alcohol, and methanol alcohol.

What we learned from our expirement is that you should always make sure that the triple beam balance is on zero before you start measuring. And remember to look at the graduated cylinder at eye level becuase if you look at the meniscus wrong you might get the wrong measurement. We also learn that water is the most dense of the three liquids. Questioins on bouyance: Question: Explain how submarines dive, surface, or keep level using ballast tanks. Answer: The submarine uses ballast tanks to fill with air and water. When it sinks they fill the ballast tank with water. When they want to stay level they fill the ballast tank with air. To keep the submarine level control amount of water and air in the ballast tanks.

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Question:Why do scuba divers need to wear weighted belts? Answer: A weight belt is a nylon belt with some lead attached, this helps a scuba diver control his buoyancy. Buoyancy helps the diver sink. they also have a quick release levers so a dive can come to the surface if needed. Scuba divers also wears a buoyancy control device or BC for short. the device is connected to the divers air tank, so when he wants to stay leveled he will put air in in his BC which will keep him from sinking. If he wants to get to suface he will release all of the air while kicking to the suface. []

Heat Transfer

Does the volume of water effect the time it will for the water to boil? Hypothesis: The water with the greatest volume will take more time to heat up. Independent variable: Volume Dependent variable:Time to boil 12/2/10 Today we are starting our volume expirement. We are using two hot plates, two beakers with different volumes, one with 100ml of water the other with 50 ml of water. We are also using two temperature sensors to see which one heats up the fastest. For our expirement we proved our hypothesis was right, the beaker with the most water took the longest time to boil. The beaker with the 50ml of water only took 6 minutes to boil. The beaker with 100ml of water boiled in 9 minutes.

=﻿= =﻿Volume and it's affect on temperature:= Question: What happens to the temperature when different volumes of different temperatures are mixed together? Hypothesis: The water with the larger volume will have a bigger impact on the water with the water with the smallest volume. Procedures: First T
 * 1) Get two beakers
 * 2) Fill one beaker with 100ml of water and fill the other with 50ml of water
 * 3) Get an alcohol burner
 * 4) Get temperature sensor
 * 5) The cold water will be 150ml get ice
 * 6) 100ml on the alcohol burner
 * 7) Put ice cubes in the 150ml of water
 * 8) Mix both of the water's together

=﻿Rock salt and it's affect on ice water:= Question: why does adding rock salt lower the tempature of ice water? The change is endothermic because energy needs to be added to melt the ice. But the rock salt disrupts the ice sorrundings so it doesn't melt

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 * salt upsets the balance and makes the melting rate slower because ice needs energy to melt
 * salt turns into ions when it touches ice the ions disrupt the hydrogen cells in the ice causing the freezing point of the ice molucules to drop which causes the ice to melt