pd+3+Group+5

 

Marking Period 3 1/31/11

Sink or Swim! Lab 3/25

We made several paper boats out of index cards. The shape of the boats we made are triangles. We are testing to see if the boats will move across the water, if we add soap to the water pan.There is a small one and a larger one, we are trying to see if they will float across the water pan. There is soap inside the pan, to see how the surface tension will react. The boat floats ontop of the water when lightly placed in the pan of water. This is due to the hydrogen bonds. It pulls on the boat equally in all directions when we put soap in differnt arears of the pan, the surface tension gets destroyed and is pulled by the other tension. When there is no soap in the water the surface tension is pulled in all directions

  This is a drawing of the size of the paper boats we used. It shows the unbalanced force pulls the boat forward, due to the surface tension, when the soap is added, it also is pulled forward.

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=﻿ = =Check out our concept map on essential and harmful elements! By Kim and Shauna! 2/22/11 = =media type="custom" key="8465198" = =﻿﻿ = =Why are elements friends or foes? 2/17/11 = ===Elements are our friends if they are essential to the human body and we need large amounts of them. We need to obtain the right amounts of the essential elements to reduce our exposure to the harmful elements. An example of a 'friend' element is iron and hydrogen. Even though iron is a metal, we need it in our blood becasue it transports oxygen through the blood to all of our cells. Our foe elements are generally metals which should be avoided completely. Other foe elements are only helpful if you ingest them in small amounts. If you ingest too much of it, it can be harmful. === =__ Movie Notes __= = -Atoms are the smallest piece of matter = = -Pure substances are made up of elements = = -Each electron has a fixed amount of energy = = -Electrons are small particles are small particles located outside of the nucleus and have a negative charge = = -Atoms are not solids = =Indirect Observation Lab 1/31/11 = = =

We inferred that the shape under the whiteboard was a hexagon but it was

actually a circle.

=__ Atomic Party 2-7-11 __= = media type="custom" key="8280958" = =Check out our Electron Cloud graphs! 2/7/11=

Shauna's: = ﻿ = = Check out our poster about atoms! 2/8/11 = <span style="color: #ea0b4d; font-family: Impact,Charcoal,sans-serif;">

Marking Period 2 = What is the density of water compared to other objects or liquids? 10/13/10 =

<span style="color: #000000; font-family: Impact,Charcoal,sans-serif; font-size: 170%;">[[image:Density.jpg]]
=** Density of Clay-10/22/10 **=

2) A boat floats because the fluid in which it is floating offsets the downward pull of gravity and pushes it up.
= Explain how the fish rises and sinks using the swim bladder. 10/29/10 =
 * === A swim bladder is just an expandable sac, like a human lung. ===
 * === To reduce it's density the fish fills the bladder with oxygen collected from the surrounding water. ===
 * === When the bladder is filled with oxygen gas the fish has a greater volume, not weight. ===
 * === When the bladder is expanded it displaces more water, so it experiences buouancy. ===
 * === When the bladder is completley inflated, there is maximum volume and is pushed to the surface. ===
 * === When the bladder is completley deflated the fish has minimum colume and sinks to the ocean floor. ===

= ﻿ = = Explain fluid pressure. 10/29/10 =
 * ==== Pressure is the amount of force exerted on a given area. [[image:IMG_2195.JPG width="269" height="161" align="right"]] ====
 * ==== The force that a fluid exerts to the area over which it exerts. ====
 * ==== Fluids exert pressure in all directions. ====
 * ==== Fluid pressure inside our cells prevents us from being crushed by the atmosphere. ====
 * ==== Fluid pressure increases with depth. ====
 * ==== Creates the bouyant force because of greater pressure at the bottom instead of top. ====
 * ==== The ratio of the force that a fluid exerts by the area over which the force is exerted. ====

= ﻿ = = Heating a Liquid 11/12/10 = We boiled water using an alcohol burner and boiling chips. The original temperature, before the boiling occured, was 21.6 degrees Celsius. The ending temperature, after boiling, was between 100 and 101 degrees Celsius. The temperature remained constant once the water reached the boiling point. This represents an endothermic change.



=﻿= = The Effect of Volume on Boiling Water 11/30/10 = === We had to answer the question that asked if the volume would effect the time it takes to boil water. We all predicted that the volume would not effect the amount of time it takes. We boiled a beaker with 150 mL of water, and it took about 23 minutes to boil. ===



=<span style="color: #800080; font-family: 'Arial Black',Gadget,sans-serif;">Check out our PowerPoint on Thermal Energy!! 12/9/10 = =media type="custom" key="7796551" align="left"=

=<span style="color: #ff7d00; font-family: 'Lucida Console',Monaco,monospace;">Check out our video about our wikispace!! 12/10/10 = <span style="color: #ff7d00; font-family: 'Comic Sans MS',cursive;">