Robert

This is my voki: This will explain why and how we are using these portfolios. media type="custom" key="10635114"

What is Science? -The study of the unknown so we may find the answer to it. In the real world, scientists find solutions to every day and complex problems and use the scientific method to solve those questions. They use tools and an abundance of resources to help pull together a final solution. In science class we find ways to use new technology and then use it in assignments to improve them. We also use tools that real world scientists would use in their experiments and ours. The purpose of this site is to answer one’s questions on certain scientific topics, and also to help us learn and have a place to keep observations.

This is my prezi on lab safety. I decided to use prezi because I thought it would be a good tool to be fun to learn from, but still very informative. It took a little extra time to do and I feel that it covers more of the topics than anybody else’s project. It does not rush you to learn like a sort video would, it still is interactive, fun, and allows you to learn at your own pace. media type="custom" key="10519782"

This is my power point saved as a Jpeg image describing my secret life, and giving some info about me. This is pretty much self-explanatory, just read it.

Brief History of Measurement A system of measuring has existed since the early ages. One of the first known civilizations, the Egyptians, developed the first known weighing instrument in 1400 B.C. It was a simple balance pointer. By 640 B.C., measuring weight was used in transactions. Merchants in the Middle East used talents (coins) to check the payments’ purity and amount given. In China, around 200 B.C., Shih Ti, the first emperor of China, set a standard for weight, length, and volume in his country. Skipping ahead about 2000 years, Gabriel Fahrenheit, a German scientist, invented the thermometer. It used mercury to measure temperature. Later, a unit of measurement on the thermometer was named after him. All these advancements have made a large impact on today’s world of measurement. Reflection So, today in science class we did a series of simulations. In fact this picture posted directly below this reflection is the first simulation we ran. In the first simulation we tested the viscosity of different liquids at different temperatures. In a way it was a kind of a race to see which flasks ball would hit the bottom first due to the different viscosity levels. The next was to see how particles moved/ interacted with each other in liquid, solid, and gas form. The third and final was the most diverse. It took a substance and charted how long it took to melt and then boil. We had to record what happened to them at different points of the simulation. All these three simulations were informative and full of important information about states of matter. Reflection In this simulation you have the power over the variables of temperature, volume, and pressure. This simulation is a very good tool since it gives you such a wide selection of variables. To run it please click on the link below. media type="custom" key="10926218"

Ice melting lab

1.Fill the first beaker to the 100ml line with warm water (40o-45o Celsius) 2.Do the same to the second cup except use room temperature water. 3. Record the temperature of the water in each cup with the thermometer. 4. Choose 2 ice cubes that are close in size. 5. Place one cube of ice in each cup; begin the stopwatch. Gently stir each cup with a stirring rod until the cubes are completely melted. 6. Observe both ice cubes carefully. Once the ice cube had completely melted, record the time it took to melt and the temperature of the cup. 7. Once the second ice cube is melt Record its melting time and the water temperature.
 * Introduction**: In this lab we took two different cups at different temperatures and tested to see which ones ice cube would melt fastest. We took a thermometer to the first to cups and an usb port thermometer to the second two. The usb port thermometer was linked to some software that charted time, temperature, and temperature change over time.
 * Problem**: How do the surrounding temperature factors affect the rate of which the ice cube melts?
 * Hypothesis**: I predict that the ice in the warmer water will melt faster than that of the room temperature.
 * Materials**: Are as follows:
 * 1) thermometer
 * 2) 2 beakers
 * 3) Water @ room temperature and water heated
 * 4) Timer or stopwatch
 * 5) Materials to record your observations
 * Procedure**s: Are as follow:


 * Data and observations**:
 * || Beginning Temperature(0C) || Time to melt(seconds) || Final temperature(0C) ||
 * Cup 1 || 21o || 255 || 15 ||
 * Cup 2(warm water) || 41o || 160 || 30 ||

Here is the chart with the digital thermometer probe:
 * || Beginning Temperature(0C) || Time to melt(seconds) || Biggest temperature jump(0C) || Biggest temperature jump time increments(seconds) || Final temperature(0C) ||
 * Cup 1 || 23o || 300 || 19-180 || 1-2 || 29 ||
 * Cup 2(warm water) || 43o || 66 || 41-35 || 1-2 || 33.3 ||


 * Results**: My hypothesis was correct. The ice in the warmer water melted faster and had a bigger temperature change.
 * Conclusions**: This lab was a short one but it drove the point home. The conclusion was an obvious one, but that’s not a bad thing. The answers were obvious and understandable but that doesn’t affect what you learn. I enjoyed the simplicity and understood the steps and was able to carry them out. I did learn and enjoyed the visual learning effects.
 * Discussion**: In ever lab there is bound to be a mistake no matter what the complexity. I believe that there were a couple possible points of error that I could identify. One could have been the timing; the stopwatch could have been stopped or started at the wrong time. The temperature of the classroom could have differentiated too.

Reflection In this simulation (above) we experimented with the stability of atoms and what makes them up. This simulation shows the orbital shell rotations of the neutrons. This simulation really helped me understand the way cells function and how they react to what there made of.

This is my wordle describing the properties of metals. As you can see there are many properties of metals….. Just look bellow!

Periodic Table Paragraph There are many elements on the periodic table, just look at it, it may seem out of order but it isn’t. Some of the properties of metal are shininess, hardness, malleability, ductility, and conductivity. The most abundant group on the periodic table is metals; they’re located on the left of the” zigzag” line. On the bottom in the 2X14 box are the lanthanides and actinides they all are metals that were invented in laboratories. Group one on the table is most reactive because the metals in that category have one valence electron; hence as one moves father to the right on the periodic table the metals become less reactive.

Purpose: The purpose of the lab was to see how temperature change affects the rate of a chemical reaction. Evidence: A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. In order for a chemical reaction to occur, the particles, atoms or ions, which are reactants, must physically come into contact with each other. Prediction: The tables put in the warmer water will dissolve quicker. Number of trials: 3 Trial one: The first trial was at room temperature water. The waters starting temperature was at 17.30C and ended at 17.20C. It took a minute four for the tablet to dissolve. When we added the tablet it dissolved at a decent rate and shed its orange glint through the beaker. Once it hit the water all of the chemical reactions started. Trial two: The second trial was with the hot water. The starting temperature was at 78.10C and the ending temperature was 80.40C. The test of it lasted 20. In the run right as we added the tablet to the hot water it dissolved immediately bringing out the orange glint in an explosion. Third trial: In the last run we added chilled water with ice cubes. The starting temperature was 1.60C and the ending temperature was .60C. It took 165 seconds to dissolve thus making it the longest trial. As we dropped tablet it stayed whole for a while, the color did not spread fast and even by the time we disposed of the liquid it still haven’t completely dissipated.

Evidence of reaction: First, there was a change in temperature each trial. Second, a color change happened in all three while the tablets were dissolving. And last, there was gas production with oxygen bubbles floating to the top of the cups.

Summary Questions:

1. At a temperature of 10 degrees C., it would take 64 seconds for 1 Alka-Seltzer tablet to react with 8oz. of water. 2. If the temperature is doubled from 20 degrees C. to 40 degrees C, the times for the rate of reaction increases by approximately double it. 3. Using hot tap water, the rate was 10 times faster than at 0 degrees C.

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 * Voice Thread Activity**

Popplet on Chemical Bonds media type="custom" key="12370838" align="center"

My Popplet About a week ago Mrs.D introduced a new tool called popplet. Basically popplet is a zoom in editor that allows one to share ones work and collaborate with others about it. We were all assigned different elements to discuss in our popplet and then share with a partner to discuss them further. I found it easy to navigate and easy to work with, but I still find other presenters like prezi more effective. since its in its beta there is a few glitches, but I'm sure they'll be resolved soon.



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Newtons photobabble Scratch Project media type="custom" key="18021898" align="center"

Scratch Project Reflection

This project involved the use of scratch to create a small skit where scratch the cat interviewed Sir Isaac Newton. This project was fun and challenging at the same time. I liked the way the project was at school and was guided by some directions that we followed. It took me some time to get the interface and understand what would work and what wouldn’t. At the end of the project I went back to scratch and recorded my voice thus giving the cat a voice that followed the script. Overall it was new and interesting and did make sense at the end.

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Reflection on online timeline  In class we were given the assignment to make an online timeline consisting of several fathers of astronomy to show the importance of what they did. Ptolemy, Nicolaus Copernicus, Galileo Galilei, Tycho Brahe, Johannes Kepler, and Isaac newton were all groundbreakers for their time and brought a new look upon the heavens. The research and typing portion of the project wasn’t hard, but dipity’s slow servers did bring some moments of immense frustration. I did learn a lot but I think I would’ve learn just as much if I hadn’t put it in a clunky online timeline. I do support the project, but think it would be much less nerve racking to do it without the online timeline part. I did learn a lot and am a more knowledgeable person from the experience. The biggest thing I pulled from this project was a great respect for the scientists the lead the beginning of space exploration, even with their limited resources of their time.

Bio cube on Isaac Newton.