Michelle

=Michelle's Science Page!=

Over the last two labs, I've learned new things. Starting with the length lab, I reviewed the formula for property and what things were important to remember when using a ruler. We then estimated the volume of our lockers using meter sticks and rulers. After we were happy with our estimations, we went to our lockers and measured the length, width, and height. Finally we compared our estimations to our actual measurements and handed in our papers.

In the volume lab, we went over how to use graduated cylinders to find the volume of objects. We made obseravtions of liquids and then learned about the water displacement method. We used that method to find the volume of the metal prism and compared that 1mL is equal to 1cm3.

My movie notes: []

My movie notes on elements, compounds, and mixtures: []

Potential and Kinetic Energy Lab:

 * We did three trials to try to get an average time that it took for the car to get to the bottom of the ramp
 * We will find the height of the ramp and the mass of the car to find the gravitational potential energy
 * Trial 1: 2.911 Trial 2: 2.371 Trial 3: 2.542 (in seconds)
 * We have to use the triple beam balance to find the mass of the car in kilograms
 * We have to find the height of the ramp in meters
 * Weight of car= mass x 9.8= 0.38906N
 * Height at starting point: 95.5 cm
 * height at finish line: 90.5 cm
 * Height of ramp: 5 cm 5cm/100= 0.05m
 * Mass of car: 39.7 grams> 0.0397kg
 * Potential Energy= w x h= 0.019453 J
 * The average velocity was: 0.4274
 * The final velocity was 0.8548
 * Our Kinetic energy was .0145 J

Temperature
__Materials__ 1. Rock-- 21.2 degrees C 2. Metal-- 18.4 degrees C  3. Wood-- 19.8 degrees C  4. Cardboard-- 19.2 degrees C 5. Plastic Foam-- 20.6 degrees C 6. Plastic-- 20.4 degrees C

The temperatures were similar. Hands do not measure temperature well. Hands measure heat. __Heat__- the transfer of energy between objects that are different temperatures. Thermal Equilibrium- The point at which two objects reach the same temp. The objects in the room are at thermal equilibrium with the air in the room.

Test Subject Which Tub is the Warmest?
 * 1. Will || Tub B ||
 * 2. Zach || Tub B ||
 * 3. Alex || Tub B ||
 * 4. Shelby || Tub B ||


 * Cold water is very cold--Will's wrists hurt.
 * Hurts Shelby's hands
 * Tub A: 20.2 degrees C
 * Tub B: 20.2 degrees C
 * PREDICTION: Tub A was warmer because once the cold or hot water came into contact with their hands, thermal equilibrium occurred causing it to feel that Tub B was warmer.

1. Energy from the hot and cold water were transferred into the hand 2. Room Temperature __Heat__- The transfer of energy between 2 objects __Temperature-__ Average Kinetic energy of the particles in an object.

Temperature of Water Lab:
 * We warmed our hot water to
 * Some condensation formed on the outside of the beaker as it was warming

You find the temperature of the hot water and add it with the cold water temperature and then divide by 2 to get around the average kinetic energy. Its about halfway in between. The whole time, energy was lost into the air, lowering the temperature.

https://docs.google.com/presentation/d/1I6EZZZdTtt2lltFJWvVDen_xrrTkciugnOWHYGv0Qr4/edit?usp=sharing

Learning By Indirect Observation - Marble Roll
In our experiment, we rolled a marble under a piece of wood to try to discover what shape is under it. The object seemed to be big because its edges were very close to he edges of the wood. It is a possibility that it is a square or a triangle because all the edges are flat except one area is blank and no edges were hit. If we did almost all areas on the paper, we would probably be able to discover what the object is. I think that the object under the board is a triangle because if it was a square, there wouldn't be a line going straight through it. Based on the areas the marble hit, I think the triangle will look like this:

Chemical Families
My chemical element is Selenium and my family name is chalcogens. Other chemical families I've heard of are pcintogens, boron, transition metals, actinides, and lanthanides. So far, these two families(noble gases and halogens) are non-metals. Halogens are very reactive, noble gases are not reactive.

https://docs.google.com/a/qcsd.k12.pa.us/document/d/1B-oznixoBzzhfKkWAbbRvaVTkHi0BAY_gNtI7RAR2-A/edit
 * Chemical Reactions:**