Christian's Lab Page

Length Lab:
In the length labs, we learned how to accurately measure out in m, cm, mm, L, and mL.
We also found out how to find the minimum scale, the scale uncertainty, and how to prevent the parallax error. Lastly we learned the formula for finding an object's volume, LxWxH.

Volume Lab:
In the volume lab we found out how to find the volume of an abject in m, cm, and mm. Then we learned how to change cm to mL, m to L, mm to mL. We also found out how to measure the volume of irregular shapes using the water displacement rule. However much water displaced is the volume of the object in question.

Mass Lab:
In the mass lab, we found out how to use the triple beam balance scale. We also learned how to find the mass of a liquid by itself by measuring the weight of the beaker then subtracting that from the total weight of the liquid and the beaker combined. Lastly we have learned how to find the scale uncertainty on the triple beam balance scale.

Notes November 8, 2013

Notes December 3, 2013

Deccmber 6, 2013 Cars and Ramps

What we thought (warmest to coolest):
  1. Plastic Foam
  2. Plastic
  3. Cardboard
  4. Wood
  5. Metal
  6. Rock
What the temperatures were
  • Metal (23.2)
  • Wood (22)
  • Plastic Foam (21)
  • Plastic (21.8)
  • Cardboard (21.4)
  • Rock (20.2)
Hands do not measure temperature, they just measure the overall warmth of an object or substance. Heat transfers from your had to the cooler substance, or from the hot substance to your cooler hand, until you pull away or hit thermal equilibrium.
Thermal equilibrium is the point at which to objects are the same temperature.
Temperature: average kinetic energy of an objects particles
Thermal energy: total kinetic energy of an objects particles

Lab 1/16/13
Hand went into ice water
No expressions
Energy transfers from body to ice water Energy transfers from hot water to body
Subject one (Will) says the warmest tub is the Tub B
Subject two (Zack) says the warmest tub is the Tub B
Subject two (Shelby) says the warmest tub is the Tub B
Subject two (Alex) says the warmest tub is the Tub B
Tub B Temperature: 20.2 degrees Celsius
Tub A Temperature: 20.0 degrees Celsius
The subjects thought Tub B was warmer because it was closer to thermal equilibrium with their body temperature, and because humans can not measure the temperature, just the relative warmth.
The reason why they felt that the cooler water was warmer because more energy flowed between the hand and the cooler water, not as much for the warmer water.
Hands only can find relative heat (the transfer of energy between two objects, from the high temperature to the low temperature).

Lab 12/19/13
Thermal expansion is when the volume of the object increases...

Heat technology link

Chemical Family
My chemical family is Carbon, and my element is carbon.
Other families: pnictogens , Noble Gasses, Gasses, Halogens, Metals, Nonmetals, Alkaline metals, Alkaline earth metals, actonides, lanthnoides.

The crime:
somebody kidnapped the penguin and demanded a ransom or his life would be taken. We found the penguin gravely ill, and a chemical was left next to him, most likely what poisoned him.
p1g6 crime scene
p1g6 crime scene

Chromatography test. We collected the pens of all possible suspects in the building and used
chromatography papers to attempt to match the pen used in the ransom note to the collected pens. No major matches were found at the time.

Hood~ Blue

Kirschmen~ No change in color

Beil~ Blue

Lancos~ Purple

Laguna~ Black

Cravener~ Orange

Rhodes~ Neon Blue
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None of the pens are a direct match to the pen on the ransom note. There were a few matches, but it would be a stretch to use it as evidence.
Mr Hood had a picture of a penguin with an X over it. So did Mr Beil, proving that they could be higher ranked on the list as possible suspects. Mr. Lancos periodically comes in to check on the crime lab progress, but he does look suspicious when he comes in.
external image 14191159024_ed43831891.jpg
external image 14191159024_ed43831891.jpg

There is no clear theif/muderer yet.

A pen was found in Craveners room, that seemed suspicious. We used the
chromatography test and the pen was almost a direct match to the ransom note ink. Cravener moves up on the list of suspects.
The heating curve test was performed on the liquid that was used to carry out the poisoning of the victim.
The heating curve test showed that there was two different substances used in the solution, because the temperature leveled out at 79 degrees Celsius, and then 99 degrees Celsius. The two possible substances are Ethyl Alcohol and Water.
Further tests will be performed.

Graph showing heating curve of the substances

Heating Curve Unknown Liquid Graph.jpg

The substance will be separated into two simpler forms via fractional distillation. The test was a success and the two substances were separated form each other. When the substance leveled off at 79 degrees, the tube in which it transfers the vapors of the substance was put in a test tube to collect the substance 1. Process was repeated to collect substance 2. Further tests will be used to identify the two simpler substances from the solution. The test might lead to more clues over the course of time and interrogations.