GRADE 8

Heeeeey its been a long time since I posted. Guess what this is my first blog post in 8th grade!!!
Yes thats right me and my pears are in GRADE 8 now and I cant wait for you to see my awesome, cool and fun blog posts i do this year. It will be even more amazing, interesting and w whole lot of fun!!!

Rope Wave Lab

Miona Milenkovic

29. May

Science 7A

Mrs. Medenica

Wave Lab

Guiding question: If you had a restricted area of moving your hand, how does the space you have to move affect the altitude, wavelength and wave frequency?

Hypotheses: I think that when I have a smaller area the frequency will be higher, but the wavelength shorter. And when I move my arm slower the frequency will be lower but the wavelength longer. Also when I have a smaller area the amplitude will be smaller and the other way around

Variables:

• Control (What you keep the same): The rope will stay the same during the whole procedure (lab)
• Manipulated (What you will change):   The amount of space you have to move your hand
• Responding (What response you are looking for): We are looking for the altitude, wavelength and wave frequency to be different.

Materials:

1. Rope
2. Measuring device (ruler or meter stick)
3. Tape
4. Markers
5. Camera (take pictures)

Procedure:

1.      Collect all the materials and find a wide and long hallway or any room.

2.      Lay the rope straight on the floor and tape one side of the rope.

3.      Pick 5 measurement which you will use, like having 30, 40, 50 etc centimeters to movie your arm.

4.      Take your data, measure the frequency, amplitude, ……

Graphs and Tables

Images/Video:

This image shows how we set up our experiment. So as you can see, there is the rope which is taped on one side. As well different pieces of tape for the amount or are we can move our hand and the direction we are moving it.

Data Analysis:

In my graph I can see a couple of patterns. First of all, I can see that whenever the wavelength is higher, the amplitude is smaller. However I think that was on accident because I know that the wavelength does not affect the amplitude and the amplitude does not affect the wavelength.  However a pattern that a I also saw is quite logical. I realized that the more space you have for your arm to move, the frequency will be higher. For example, when I only had 10 centimeters to move my hand, I got 103Hz, and when I had 100cm to move my hand, it was only 50Hz. The reason why is because I need more time to create one wave when I need to go a farther distance. However when my arm moves a shorter distance it can create more waves during one minute. I really think that our experiment could have been more accurate. There are some parts which are not very precise. For example, the graph with the amplitude and wavelength. I don’t really think that the amplitude is always smaller when the wavelength is bigger. However that is one small slip

Conclusion:

In this experiment our guiding question was, if you had a restricted area of moving your hand, how does the space you have to move affect the altitude, wavelength and wave frequency? My graphs show the answer to that question. It shows that when you have more area to move your arm, the frequency will be lower, the amplitude and wavelength will be higher, and the opposite. However I don’t think that the wavelength and amplitude affect each other. However frequency affects wavelength and amplitude. When the frequency is higher the amplitude and wavelength is lower. I also see that the amplitude and the wavelength don’t affect the frequency of a wave. So as you can see my hypothesis was right all along.

Further Inquiry:

As I said above, I do see some errors and some places where we could have took more accurate data. However I think the reason why that happened was because Irina and I were rushing to finish up collecting our data so we could finish our lab write up. Some ways to improve is to maybe have more time together to finish, or Irina and I could be more effective, but the second way is probably better. J I also think that next time we should take care of our data, make sure that its correct and not just an estimation. Apart from all these little mistakes, I still think that my hypothesis is correct and I am still sticking with my same thoughts as before.

Epicenter Questions and Answers

In class we had to answer a couple if questions about the earthquakes epicenter. These are the questions and answers.

1. Observe the 3 circles you have drawn. Where is the earthquake's epicenter? I think that the epicenter of all the earthquakes is in Frankfort.
2. Which city on the map is closest to the earthquake's epicenter? How far, in kilometers, is the city from the epicenter? The closest city to the epicenter on the map of the whole earthquake is  more probably Nashville. It is roughly 110 kilometers far.
3. In which of the 3 cities listed in the data table would seismographs detect the earthquake first? Last? The first one it would detect would be Chicago however the last earthquake would probably be close to Denver, and the second one would be somewhere around New Orleans.
4. About how far from San Francisco is the epicenter that you found? What would the difference be in arrival times of the P waves and S waves for a recording station in San Francisco. The difference in arrival times between P and S waves would probably be around 2,900 kilometers. The Primary waves would arrive first, with secondary waves following.
5. What happens to the differenct in arrival times between P and S waves as the distnace from the earthquake increases? When the distance from the earthquake increases that means there will be more time between the S and P waves

Hurricanes!

Miona Milenkvic

Mrs.M

7A Science

2nd June 2012

Hurricane Essay

Hurricanes are huge thunderstorms. "They create winds which can be up to 119 kilometers per hour (74 mph) or higher. That's even faster than a cheetah, and they are the fastest animal on land." The huge winds from a hurricane can break down buildings and even take out trees out from the ground. When a hurricane begins, weather forecasters can tell where and when it will be at a certain time. They also predict its strongest and weakest points. This information can prevent deaths since it gives people time to prepare for the hurricane which are coming up. There are many different parts of a hurricane. First there is the Eye. It is the small blue circle in the middle of the hurricane. In that part of the hurricane the winds are usually not as strong and with not as many clouds and storms. Next is the Eye wall. It is a huge cycle of different storms. All the storms go around the eye. The winds have the most power and very rainy in that area as well. Lastly are the Rain bands. They are groups of many clouds and a lot of rain which go around the eye walls.

"How do hurricanes form, maybe when Mother Nature gets angry?" I know that is what you have been hoping for and constantly saying in your brain, however that is really not the case. The real reason why is because they desperately need warm water, humidity, moist air, winds, and quite warm surface temperature. During summer and fall is the best time during the year for a hurricane to develop. The first sign of a hurricane are a group of a lot but small thunderstorms. Afterwards, they will become more "organized". Three specific things have to happen for a hurricane to be created. A vaporization and condensation cycle, different wind patterns and a very small difference in air pressure between the slow and high altitude.

Hurricanes can only happen in a large area of warm water like an ocean or sea. This is because of the fact that they need a large amount of energy which they get from the warm ocean waters. Hurricanes can occur a couple degrees away from the equator. This is because the coriolis effect does not have enough power at the equator to cause a hurricane.

Hurricanes can cause so many disasters in just one place and during only one time. Storm surge is the worse disaster it can cause. Storm surge is huge wall of water that moves towards the shore with the hurricane. Out of all deaths caused by hurricanes, 90 percent is because of storm surge. High Winds is the most common disaster of all hurricanes because it shows how strong the hurricane is. Winds in a hurricanes can be as high as 200 mph and even higher. Lastly, very heavy rain and flooding. After the rain from the hurricane and when the winds stop, the huge amount of flooding is a disaster.

Even though hurricanes can take away many lives from other people,destroy someones property which will later have to be rebuilt, they can also be important to a lot of needed rain regions and provide water to very dry regions. Hurricanes can sometimes give rain and water to the Southwestern United States and parts of western Mexico. Also, Japan got even more than half of the rain and water from hurricanes.
However, apart from that, hurricanes still do kill and take away our houses, and as you know, destroying, leads to rebuilding.

As you all know, all hurricanes have a special name for them, they are not just given randomly, there is a reason. There can be more than one hurricane at once on the planet, of course. To be able to keep track and talk about all of them, they are given different names in alphabetical order. A normal storm cannot be given a name, only hurricanes get their own. Every single year, each hurricane is given a name. In total 6 lists of names in alphabetical order exist, one for each year. All the lists are used again every six years. If a storm causes too much destruction, they can sometimes erase it from a list. However it doesnt stay without a name, it is given a new name with the same starting letter.

As surprising as this must seem, all the dust storms from Africa and other countries can affect hurricanes as well? I bet you didn't know that. There are 2 NASA satellites in space which sees how dust affects hurricanes. Scientists are able to do many crazy things, even fly airplanes into hurricanes, can you believe it!  Some areas in the hurricane are not safe for people to fly into or above. However they can still collect the data, they fly out airplanes in hurricanes but without humans in it. Scientists study hurricanes in many ways. One way of studying hurricanes is through a bunch of photos which are taken from outer space with outer space satellites like the hubble. Some other satellites can even estimate the height of clouds and the temperature of the ocean. Others measure the the speed of how the rain is falling from the hurricane. But others measure the speed and direction of winds as well. Scientists use the data they collect from these satellites to understand hurricanes much better. The data can help them in many ways. It helps understand how hurricanes work and how they are formed.Another way it helps is because they can know where and when the hurricane will occur, with that, people have time to prepare and prevent death.

Bibliography:

"HURRICANES AND TROPICAL STORMS." NOAA. N.p., n.d. Web. 2 June 2012.

     ?n=hurrweb>.

"Hurricane Facts." The Weather Around Us. N.p., n.d. Web. 2 June 2012. 

     Thematic%20Units/The%20Weather%20Around%20Us/hurricane_facts.htm>. 

"Tropical cyclone." Wikipedia. N.p., n.d. Web. 2 June 2012. 

     Tropical_cyclone>. 

Video Of The Week - Garrett McNamara's Record Breaking Wave Ride

The whole day of Hawaiian-bor Garrett McNamara’s victory began as a day when he did not really feel like surfing. But that was the day when he got his name in the genius world record book.

It happened in November of 2011, when the he was surfing waves in Nazaré, Portugal in an area with huge waves at all times.

The day before, he kept on failing to stay on the board, he wanted to take a break, but was convinced that he can complete just a couple of waves correctly, and so he accomplished that. One wave during that time was about 90-feet tall, at least that is what his friends said.

The wave was looked at by some professional scientists, their verdict was 78-feet tall, even if it’s not 90 feet exactly, it is pretty close, and still one foot higher than the last record in 2008. This accomplishment gave him a place in the book and he set a new record for the upcoming surfers.

This article really cought my eye because I love surfing, well not me personally, however I do love watching people surf on huge waves. I think that this is amazing because I dont understand how people can stand on water and stay on with water bursting everywhere. I also choose this article because our new unit is about waves, just like this article. I hope you enjoyed my article.

http://www.dogonews.com/2012/5/14/video-of-the-week-garrett-mcnamaras-record-breaking-wave-ride
ByMeera Dolasiaon05/15/2012

Video:

National Data Buoy

In class we had to go check out and read an interesting web site that let us understand and see all the different buoys arount the world, it will know where a wave occurred in a period of time, for example when and where the last tsunami occurred and where the highest wave took place you can also see the height of the biggest wave and the smallest wave occurring at a point in time. What we need to do with this blogpost is to find out where and the details of the smallest and biggest wave. We need to find the sir temperature, water temperature etc. And lastly we need to figure how are these buoys so helpful to our society, like boatmen, scientists or even us.

What I really think where the highest wave occurred is probably somewhere near the coastal area. I am guessing it occurred somewhere in Europe since it is surrounded by land and not many tsunamis or earthquakes occur in that area.

These buoys can be very helpful to meteorologists because they can find out what the weather will be like in this location, rainy, windy etc. It can also detect different disasters like tsunamis. This fact may not be very helpful to me since a tsunamis is very rare in my country, well impossible. However the people who really should be checking this website more are people who are on the coasts, they are the ones who re in danger of a tsunami. Buoys can let them know if the next tsunami or big wave is arriving soon. Lastly buoys helps us and scientists to study very well waves and their patterns on the oceanic crust in different places and we can get warnings of waves if our lives may in any way be in peral. Lastly, buoys are very helpful to other people especially to boatmen for many different reasons. First, because they show them exactly where they can go and fish or to warn them about rocks, waves or different objects in the ocean.

Understanding Buoys would have helped me if I had it in two different places. Even though there are some in seas and oceans, a bigger difference would have been better. Like one in an ocean and one in a small river or pond. 

Web site we used: http://www.ndbc.noaa.gov/

The buoy that i found with highest wave height was a buoy at station  64045 .

These are all the detail of that buoy:                                This is the buoy:

The buoy that i found with the lowest wave height was a buoy at station 42002

These are all the details of that buoy:                                                         this is the buoy:

       

Wave Interference

In science class we just started a new unit about waves. Before we started learning about it we went to visited a government building of measurements which is where we god our first knowledge on waves. This week we finished a lab where we used 2 droppers, 1 small Styrofoam ball, a tray full of water and some sticks of lay. We had to drop drops of water in the trays with or without different barriers. We had paper towels, Styrofoam balls and clay, and with that we had to see what was going to happen to the waves when we dropped water. We observed it and recorded the information on a sheet. In order to see how the waves really work, we looked through a website, and tried the applications that helped us observe how the wave will be if the amplitude or frequency increase or decrease. (http://phet.colorado.edu/en/simulation/wave-interference) This is an excellent way of observing the effects that the changes have in the height of the waves.

Guiding Questions:
a) When water is dropped from a pipette into a pan of water, how does the wave behave?

b) What properties does a mechanical wave have?

c)How do waves interact with each other and with solid objects in their paths?

Hypothesis:
a) The disturbance that we create, creates waves as well as rippples and it will keep going until it has no energy.
b) frequency, amplitude and wavelength. 

c) When two waves interact is when they crash into each other. When they meet then they start getting slower since the opposites waves slowed them down. If there is an object in its path, it either goes around it, over. However it can also go under it.

Try different combinations. Try increasing the amplitude or the frequency. Add another dripping faucet. Add a barrier (wall) or try a slit or two.  Try turning the sink to the side view.  How do these changes affect the appearance of the waves?  What have you learned about wave properties (wavelength, frequency, and amplitude) and how waves interact


First of all I realized some basic things. When there is only one barrier the wave will go around it, however with 2 barriers and a whole in the middle, the wave will go around and between. However with no space to pass it will stop moving. When I increase the frequency and amplitude, the waves are the biggest and there are more waves as well. However with a high frequency and low amplitude the waves will be smaller however more in number, as well as the opposite. So if the frequency is high and amplitude high, the wavelength will be short, and if the frequency decreases the wave length will be bigger however not the amplitude. when both the frequency and amplitude are medium then, there will be many waves and the height wont be at its highest. However the wavelength will be short.

Pictures of Data I recorded in class:

Making waves lab:
Data Analysis: What pattern or relationships do you see in your data/ sketches/ images? When I look at my drawings where I drew the patterns between the waves we made in class, I saw when we have the paper towel on the top of the water, the wave goes underneath it. I also realized that when we have only one peace of clay in the middle of the tray, the wave will always go around it, however not bounce of, and with two it will go around it. Lastly when we have the foam ball in the water, the wave does carry it up and down, however the ball stays in place and that is because  the wave doesn't carry the medium with it. When we have both the clay and the foam ball the same thing happens just in the same time. I saw during the experiment we did in class is that when the wave bounces of the side of the tray, you can see one wave underneath the other as well.However when it has obstacles it slows down as well but faster. Just one thing I want to add to this lab report is that when the waves don't have a barrier to go around or in between, the wave keeps the exact same speed until it dies down.

Conclusion: What do you conclude about the behavior of waves in the various situations you created today? Can you aswer the guiding questions now? What I really realized in this lab is that when we do something else to the water, the result will be different. When there is something blocking its path that is floating, the wave will go under it. When there is not an obstacle or something in its way it keeps the same speed until it dies down. When it has different barriers, the wave will go around it if it can, and also can in between it. which was weird to me. Before this experiment I answered the theses questions partly right. I did say that it can go around the object, however never thought that it could bounce off.