p1+g3

= = =Welcome to Group 3's Wikipage!!!!=

November 1st 2007 Today we learned how to use the pressure sensor. We created a lab and procedure to test the equiptment. We wanted to see if the change of air volume affects the air pressure. In our lab we started at two different air pressures; 0cm3 and 25cm3. Here is our graph:

October 29th 2007 We started a new chapter called the states of matter. Our group researched solids. Here is what we found:


 * · Solids keep their original shape and volume.
 * · Solid is the state in which matter has a definite shape and volume.
 * · The particles of a solid substance are very close together.
 * · The attraction between them is stronger than the attraction between the particles in a liquid or gas state.
 * · The atoms or molecules in a solid move, but not fast enough to overcome the attraction between them.
 * · Each particle in a solid vibrates in place because it is locked in position by the particles around it.
 * · Solids are divided into to categories- crystalline and amorphous.
 * · Crystalline solids are orderly and three dimensional.
 * Some examples of Crystalline solids include iron, diamond, and ice.
 * The other kind of solids are amorphous.
 * Amorphous solids are made of atoms or molecules in no order.
 * Examples of amorphous solids include rubber and wax.

October 19th 2007: We did a lab to figure out why clay boats float. Here is our summary:

In this lab some clay boats floated and some sank. The boats that floated had curved sides and had thinner walls. The average amount of water displaced for a floating boat was 10.7 grams, and for a sinking boat it was 6.3 grams. We determined that a floating boat displaced around 10 grams of water because we used 10 grams of clay. This is why boats float.

October 10th 2007:

Today we did a lab in which we had to measure the volume and mass of irreguarly shaped objects, and whether there is any correlation between it. This is our conclusion of the lab: The data of this lab shows that there is no correlation between the mass and volume of different objects. For the metal rod the volume was 4cm3 and the mass was 30.5g. But, for the rubber spacer the volume was 6cm3 and the mass was 6.5g. This data shows that there is no correlation between the mass and volume of different objects. Here is our data table:


 * __Object:__ || __Volume: (cm3)__ || __Mass: (g)__ ||
 * Plastic Screw- || 9 || 10.4 ||
 * Rubber Spacer- || 6 || 6.5 ||
 * Metal Rod- || 4 || 30.5 ||
 * Rectangular Prism- || 8 || 22.75 ||

October 5th 2007:

Mission Possible: Who sunk the boat?

Here are the suspects: __Mass:__
 * Mass is a unified body of matter
 * The SI Unit of mass is a kilogram
 * A stationary mass remains stationary, and mass in motion and in a constant direction maintains that state of motion unless acted upon by a force
 * Mass can be calculated if a force and acceleration are known
 * Mass is the amount of matter an object has
 * Living object’s mass changes over time because they grow, but non living object’s mass doesn’t change
 * It can be measured in the Triple Beam Balance
 * Objects with greater mass have greater inertia
 * Inertia is the tendency of all objects to resist any change of motion

__Weight:__


 * It is a measure of the gravitational force exerted on an object
 * The weight of an object can change depending where the object is on earth
 * Weight can be measured with a spring scale
 * The SI Unit for weight is newtons
 * One hundred grams equals one Newton
 * Weight and mass are often confused, but the weight of an object depends on its mass

__Volume:__


 * Volume is the amount of space that something occupied.
 * The volume of liquids are expressed in liters.
 * The volume of solid objects are expressed in cubic meters.
 * To find the volume of any object multiply the width, length and height together.
 * If an object has volume it cannot occupy the same space at the same time with another object that has volume.
 * To measure the volume of gas, measure the volume of the container the gas is in.
 * Gratuduated cylinders are used to measure the volume of a liquid.

__Malleability:__

· Malleability is the ability to be pounded into sheets · Most metals are malleable meaning they can be flattened with a hammer or other tool without shattering · Malleable metal is softer more pliable metal · Aluminum is an example of malleable metal. It can be pounded into sheets to make aluminum foil · A metal that is malleable is ductile

__Ductility__


 * It is the ability to change shape without fracture
 * Ductility is usually measured by hardness
 * It is similar to elongation
 * It refers to the amount of inelastic deformation which is a material or structure experiences before failure
 * Ductility is the ratio of total displacement or strain at failure, divided by the displacement or strain at elastic limit
 * A metal that is ductile is mallable

__Texture__


 * It is the appearance and fed of a surface
 * It is the distinctive physical composition or structure of something, especially with respect to size, shape and arrangement of parts
 * It has the essential quality of something
 * A measure of the variation for of the intensity of a surface, quanitifying properties suck as smoothness, coarseness, and regularity

__Our main suspects__: Mass and Volume