Kennedy

=== This assignment we were supposed to create a voki to introduce our digital portfolios. I used Voki to do this project, because it is easy for me and fun! The purpose of what I posted is to help people learn about my wikispace, and I would like them to learn about everything that is available on my page! === media type="custom" key="10650224" align="center"

What is Science

=== In the real world scientists are always looking for cures for all types of sicknesses, and they observe their experiments everyday. They also explore new things such as: plants, animals, sea life, and other things. ===

=== In science class we learn what it is like to discover new things, we do reports, we use a lot of technology with wikispaces, Google Docs, Moodle, and other websites. We also read out of our book, and sometimes use the internet and videos to learn more about it. ===

The purpose of this site is to share what we have learned with other people, and to learn more from other's information as well. We use this website because its a creative way of sharing
= This is my Lab Safety Animoto. I used animoto because I personally thought it would be a good way to teach readers about safety with science. The purpose of this is to teach people about the safety of science so when they do an experiment, they can stay safe. I would like my readers to learn that when doing experiments you can have fun and stay safe. =

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Many people study science, but they don't know the history of it. In Egypt, in 1400 B.C. they developed the first weighing system, and simple balance measurer. The egyptiansused to use body parts to measure because they didn't have rulers or measuring tapes, but luckily they developed this. In 640 B.C., Lydians were the first to have coins with a weight and value. Shih Huang Ti, the first emperor of China, set standards for weight, length, and volume. Earlier than this the chinese were the first to develop a decimal system. In A.D. 700, in England, the word acre was a common word in the area used for measurement. Shortly after, in A.D. 789, Central Europe created a tandard unit of weight called, "Karlspfund." A.D. 1714 Germany invented the thermometer, and the name for a unit of temperature came from Gabriel Fahrenheit. In the year 1983 France defined a single set of units that is the same anywhere and everywhere. As you can see many countries around the world contributed to the history of science and made a huge impact. =====

=== Below is a link of a website that I visited today in class. It was a Gases Simulation. We could add more molecules, heat them up, or cool them down. I enjoyed this simulation, but it took some thought. Just like yesterday we completed a worksheet while we were doing it. I learned a lot from this and the worksheet. Overall, I like doing this better than reading from the book. ===

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**Melting Ice** (Celsius) || TIME TO MELT || ENDING TEMPERATURE (Celsius) || (room temp.) || 25 degrees || 44 seconds || 20 degrees || (warm water) Cup 3 (room temp.) Cup 4 (warm water) || 42 degrees 20.4 degrees 49.6 degrees || 31 seconds 261 seconds 73 seconds || 31 degrees 14.8 degrees 38.9 degrees ||
 * Introduction**: Today in science class (November 1, 2011) we did an experiment about melting ice. We had to cups, and one had hot water and one had room temperature water. We then observed how long each cup took to melt one cup of ice. However, we did this various times and our results varied.
 * Problem:** How does the temperature of the surroundings affect the rate at which ice melts?
 * Hypothesis:** The warmer the temperature the faster it’ll melt. The cooler the temperature the slower it’ll melt.
 * Materials:**
 * Thermometer
 * 2 plastic cups (2 mL each)
 * 2 stirring rods
 * Ice cubes (2cm on each side)
 * Warm water (40-45 degrees)
 * Water at room temperature
 * Stop watch
 * Procedure:**
 * 1) **1.** Read steps 1-8. Based on your own experience, predict which ice cube will melt faster.
 * 2) **2.** In your notebook, make a data table like the one below.
 * 3) **3.** Fill a cup halfway with warm water (40-45 degrees) Fill a second cup to the same depth except with room temperature water.
 * 4) **4.** Record the exact temperature of the water in each cup.
 * 5) **5.** Obtain two ice cubes that are as close to the same size as possible.
 * 6) **6.** Place one piece of ice in each cup . Begin timing with a stop watch . Gently stir each cup with a stirring rod until the ice cubes melt.
 * 7) **7.** Observe both ice cubes carefully. At the moment one of the ice cubes is completely melted, record the time and the temperature of the water in the cup.
 * 8) **8.** Wait for the second ice cube to melt. Record its melting time and water temperature.
 * Data and Observations:** While I was observing the lab I realized that my hypothesis was correct and that in the warmer water the ice cube melted quicker.
 * WHICH CUP? || STARTING TEMPERATURE
 * Cup 1
 * Cup 2


 * Results:** At the end of the experiment, I learned about the melting of ice. In the room temperature water the stating temp was 25 degrees Celsius. When we placed the ice cube in the water it took about 44 seconds to melt, and the ending temperature was 20 degrees Celsius. In the warm watered cup the starting temperature was 42 degrees Celsius, which was the correct temperature needed indicated in the instructions. When my group placed the ice cube in the second glass it took only 31 seconds to melt. As you can see, in the warmer water the ice cube melted faster.
 * Conclusion:** What I learned from the experiment is that when you place an ice cube in regular water it takes 11 more seconds to melt compared to if you put it in warm water. The ending temperature changed 5 degrees in cup 1, but in cup 2 it changed 11 degrees. After my I completed my lab I looked back at my hypothesis, and noticed that it was correct. I had said that in the warmer temperature the ice melted quicker. The warmer water caused the ice cube to melt quicker because it was warmer than the other room temperature water.
 * Discussion:** While I was working on my experiment I experienced some difficulties and I had some errors. During my experiment I noticed that the ice cubes that we placed in the glasses were different sizes, and that could cause the times to be different. Also we started the times a few seconds early so we restarted it dumped out the water and re-did the steps that we messed up on. We then tried our experiment several times, and got about the same data. However, we still learned the same thing even with our errors.

[[image:2012portfolios/lithium_picture.jpg]]
The periodic table consists mostly of metals. All of the elements are divided into groups. There are many groups in the periodic table. One of them is metal. The most reactive metals are found in Group 1, the first column on the left. All metals are found to the left of the zigzag line. Metals show a wide range of chemical properties unlike other elements. There are approximately 95 metals on the periodic table. Chemists classify metals by shininess, hardness, ductility, and malleability. A ductile material can be pounded into shapes, but a malleable material can be pulled out or drawn into a long wire. Most metals are good conductors of electricity. Also, they are magnetic. As you can see, metals are a significant element on the periodic table.



Alka Seltzer Lab media type="custom" key="11846716"

The purpose of this lab was to see the affects of a chemical reaction. A chemical reaction is a process in whgich substances underfgo chemical changes, forming new substances with different properties. Some evidence that can tell you a chemical reaction has taken place is: color, temperature, and bubbling. My oringinal prediction was that using hot water out of the tap, the rate of the reaction will be 3 times faster than at 0 degrees c. During this lab my groupo and I did 3 total trials. In trial number 1 (Room temperature) the starting temperature was 18 degrees C, and the ending temperature was 16.6 degrees celcius. It took 1 minute and 1 second for the alka-seltzer tablet to dissolve. While the tablet was dissolving the water was bubbling and he began to smell like oranges. For trial number 2 (Cold water) the starting temperature was .8 degrees celcius, and the ending temperature was .6 degrees celcius. The alka-seltzer tablet took 3 minutes and 28 seconds to dissolve. In the cold water it bubbled less than anything else. In each trial that took place I saw the liquid bubbled, the water turned orange, and the temperature changed a little bit. As the temperature increases the rate of the reaction goes faster. At a temperature of 10 degrees C, it would take 1 minutes and 40 seconds for 1 Alka-Seltzer tablet to dissolve. If the temperature is doubled from 20 degrees C to 40 degrees C, the time for the rate of the reaction will be more by approximately 2 times. Using hot tap water the rate was about 9 times faster than at 0 degrees celcius water.



Popplet on Chemical Bonding

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This past week I have been learning about ethane. Ethane has two carbon atoms and six hydrogen atoms. Does Ethane form Covalent or Ionic bonds? I learned that Ethane forms Covalent bonds. The compound Ethane is used in making ethylene for plant compounds. Ethane was first synthetically created by a scientist, but it wasn’t correctly done. In 1864, scientist Carl Schorlemmer successfully recreated ethane. Now that I learned about Ethane I know that it is very helpful to us!

Voice Thread (type a reflection of the activity)

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Chemical Bonding Simulation Yesterday in science class we worked on a compound simulation. First we solved each compound, and then drew a picture of each compound on our worksheet. On the worksheet it asked us to fill in the chemical formulas and an illustration of each compound. At the end of the simulation I had solved and illustrated 16 compounds and gave the formula. While illustrating each compound I had to color each electron so I knew which ones were being shared. I enjoyed doing yesterdays simulation even though I encountered some problems such as: pictures getting messaged up and letters getting frozen. _ **__ Indicator Lab __** The purpose of this lab was to help us learn to identify whether it was a base or an acid. An indicator is a compound that changes structure and color when exposed to certain things. Indicators are very useful for doing tests and experimenting. We used a probe to tell us the PH level so we could identify what it was. The indicator we used was red cabbage juice. Red cabbage juice is a natural indicator that helps determine whether each substance was a liquid or a base. Water, in this experiment was used as our control. Water was blue, and the PH was 6.6. Water was an acid, but is very close to being neutral. The control is used to help identify because the control is so close to being neutral. The purpose of our lab was partially met. In the beginning, we experienced some problems because somehow soap got mixed with our solutions. We had to start over, but we still faced troubles because of our red cabbage juice. Although we experienced some difficulties, we could still learn how to use the PH probe and how to tell whether it was an acid or a base. I feel like I learned a lot from this experiment because we could see the color, PH number, and if it was an acid or a base.

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 * ** Substance: ** || ** Color: ** || ** Number: ** || ** Acid/Base/Neutral: ** ||
 * Baking soda || Light blue || 7.78 || Base ||
 * Vinegar || Pink || 2.89 || Acid ||
 * Lemon juice || Light pink || 2.18 || Acid ||
 * Ammonia || Teal || 8.16 || Base ||
 * Apple juice || Pink || 3.74 || Acid ||
 * Water (control) || Blue || 6.6 || Acid ||

This is a Fotobabble about Newton's Laws of Motion and the Marble Race we did. I was able to use this tool to explain our marble lab and include a picture. I found this tool a lot easier than all of the other tools that we have used before. I will definitely use this tool again because I found this a quick way to teach other about the Laws of Motion.

Scratch For the past few days we have been working on Scratch. Scratch is a great way to help you understand animation. I used scratch to teach people what I knew about Sir Isaac Newton. I found it very easy with the help of the instructions that my teacher gave us. I had trouble however trying to embed it and it deleted which caused me to start over. Even though I had to start over it only took me about 10-15 minutes to do it over again. I really liked the way scratch worked and hope to use it again! media type="custom" key="18156094" Dipity Timeline This week in science class we created a digital timeline about the history of the solar system. We used dipity to add people and events that would help us understand better. I really enjoyed using dipity because I found it an easy way to help me understand. Some people in my class however had trouble with the website. For them it went very slow, but for me it didn't. I will definitely consider using this next time for my digital timelines. media type="custom" key="18596984" In science class this week we have been working on a Bio Cube. The Bio Cube really helped me understand more about a very important scientist, Galileo Galilei. Without this I didn't know as much about Galileo. This was a fast and easy way to teach me more. I didn't think was boring or hard. I liked doing this better than reading out of the book and taking notes. This way I can upload it digitally and I can print it out as a cube. If I have to do another project on a person I will definitely use this!