Pd+1+Group+5

=It is revealed, for example, in floating of some objects on the surface of water, even though they are denser than water, and in the ability of some insects (e.g. [|water striders]) and even reptiles ([|basilisk]) to run on the water surface. This property is caused by [|cohesion] of like molecules, and is responsible for many of the behaviors of liquids.= =Surface tension is a property of the surface of a liquid that allows it to resist an external force.= =Surface tension: The property of a liquid that makes it behave as if its surface is enclosed in an elastic skin. The surface tension is defined as the force acting over the surface per unit length of surface perpendicular to the force. It is measured in newtons per metre. The surface tension of water is very strong, due to the intermolecular hydrogen bonding, and is responsible for the formation of drops, bubbles, and //meniscuses.//= = = = media type="custom" key="8491796" = = Atoms Vocabulary = 2/8/11 Atomic Number: the number of protons in the nucleus of the atom. Atomic Mass Unit: SI unit used to express the mass of particles in the atom. Atomic Mass: The weighted average of the masses of all the naturally occuring isotopes of an element. Mass Number: is the sum of the protons and neutrons in an atom.

Marking period 3 Neils Bohr proposed that electrons orbit around the nucleus. Electron cloud- the region where electrons would probabaly be found swirling around nucleus. Atom:smallest piece of matter that cannot be commonly broken down. Element-a simple pure substance that cannot be changed into a simpler substance.

Atom’s Party We are having a party with all of the great scientist who developed a theory for the atom. We are going to have games, cool decorations, and food. The scientists who are invited are Bohr, Thomson, Democritus, Dalton, Rutherford Schrodinger and Heisenburg.

We would like if each scientist brought food of different kinds to represent their theory of the atom. Thomson will be bringing plum pudding, Rutherford is bringing liquorish, and Democratis is bringing chocolate coins. Dalton is bringing trail mix. Schrodinger and Heisenburg are bringing marshmallows.

We will also be supplying entertainment like games. The games we will be having are “Pin the nucleus on the atom”, “Atom Trivia”, “Name that Theory”. We just made these games they are quite fun. When we play them time flies by!

We have very nice decorations. We have diagrams of each scientist’s theories. Also, we have 3-D images of each scientist’s atom. The room will be painted gold to represent Rutherford’s experiment involving him shooting the alpha partials at the gold tin foil.

Come out and enjoy the party. You will have a ** blast! **

Love, Nick Waibel, Coulton Terry, Victor Caligiuri

Marking period 2

Density graph

Our group has four people. Victor, Jeff, Tyler, and Coulton. Jeff is the lazy person. Tyler is the awsome person. Coulton is the brains and victor "Its a jersey thing". This is our group. four awesome teens that are ready to learn.

Our trials were water, lead, rubbing alchol, and copper. Water-1.495 Lead-21.35 Rubbing alchol-1.295 Copper-1.5055

What we need to reaseach was fluid pressure. What we learned was the fluid pressure is pressure at some point within a fluid, such as water or air. It can occur in two situations. In an open condition, such as the ocean, or a swimming pool. Also a closed conditionsuch as a water line or a gas line.[|Fluid pressure]

we researched how fish use a swim bladder to float and sink in the water. we found out that the fish fills it up with two gases the swim bladder is located at the dorsal fin when the fish is an infint they must go to the surface to gulp oxegyn until they mature enough then the gas glans will start functioning.



december 2, 2010 Boiling lab Question: Does the volume of water effect the time it will take for the water to boil Hypothisis:I think it will effect the time because it will take more energy to heat up all the water. Independent varable:Volume of water. Dependant varable:Time, Temperature constant: Amout of water, type of container These screen shots are of the trials we have done showing how long it took our beakers filled with 50 ml of water and 100 ml of water.

Volume 50mL Trial 1

Volume 50mL Trial 2



Volume 100mL Trial

New Experiment

Question: What happens; to the temperature of water when different volumes at different temperatures mix together. Hypothesis: The volume that has more water in it will change the water with less volume be mixedcause the bigger volume of water has more kentic energy. Independant variable: volume of water Dependant variable- mixed results of both volumes at different temperature. Condstants: Amounts of cold water and hot water, container of hot and could water.

Improve] The salt is not actually making the ice colder. The internal portions of the ice are already below 0 degrees Celsius. The salt, or NaCl, gets in the way of the intermolecular forces of the water, allowing the ice to melt at lower temperatures and remain in the water phase below 0.

Read more: []

Water and rock salt lab we got a beaker and filled it with ice water. then we got a smaller beaker and filled it with water and put it in the bigger beaker. then we put rock salt and poured it in the ice. then we measured the water and it was under 0 degrees celius.media type="custom" key="8476578"