Storms

Our final section in our text book talks about storms and weather forecasting. For our final assignment on weather, we are going to the computer lab to learn about tornadoes and hurricanes.

Tornadoes form from severe thunderstorms in a cumulonimbus cloud. When warm, moist air rises upward and meets colder, dryer air, the air begins to spin in all directions. If the wind staggers in just the right manner with sufficient speed, they will act on the upward rising air, causing a horizontal spinning effect in the lower troposphere. Once the moving air reaches the lowest part of the atmosphere, it is called a tornado. A tornado’s wind speed can move anywhere from 40-300 miles per hour. Tornadoes can develop almost anywhere in the world but are most commonly found in the Unites States.

Hurricanes, on the other hand, usually have slower wind speeds but can be just as deadly. Hurricanes must form over warm, moist water. Remember the remnants of hurricane Ike that reaches Burg last September? Imagine wind speeds twice as fast, a tremendous amount of rainfall and flooding almost up to your house. Unlike tornadoes, which last minutes to a few hours, hurricanes can last from days to weeks. Hurricanes move in a counter-clockwise direction around an “eye”.

The eye is the center of the storm and is the most calm. Don’t let this calmness comfort you. The outer part of the eye has the fastest wind speeds. These high winds do not cause most damage and casualties during hurricanes. Strong winds over the ocean can cause extremely large waves of water called storm surges. These storm surges create rapid movement of water over the land and flood the entire area.

Click on the following links below to complete your tornado and hurricane webquests.

 

Tornadoes and Hurricanes Computer Activity

As a 7th grade meterologist your task is to create a presentation that will be used to teach your readers about about severe storms.
You are to use the internet and books as resources and cite all sources used.

 

Visit the following website to learn about storms. You will make a post about what you have learned. REMEMBER TO CITE YOUR RESOURCES!!!!!

Some questions you should be able to answer after completing the webquest include:
  • How do tornadoes/hurricanes form?
  • What kinds of destruction can be caused by these storms?
  • What are some ways to stay safe during a tornado/hurricane?
  • How do we know when a tornado/hurricane is coming?
  • How are tornadoes and hurricanes different/alike?

FORCES OF NATURE WEBQUEST!!!!!!! SEE LINK BELOW!!!!

http://environment.nationalgeographic.com/environment/natural-disasters/forces-of-nature/

 

 

 

 

Another tornado simulation

http://whyfiles.org/interactives/a2.html

Grow your own tornado

http://dsc.discovery.com/convergence/tornado/interactive/interactive.html

Current Hurricane tracker

http://www.nbc6.net/hurricanetracker/index.html

Create a Hurricane

http://www.nhc.noaa.gov/HAW2/pdf/canelab.htm

 

Other Websites Thanks to 

sites.google.com/site/tornadoquestunited/introduction

FEMA for Kids: Tornadoes | Basic Information on Tornadoes 

Web Weather for Kids  |  How Do Tornadoes Impact Our Lives? How Are Tornadoes Formed? 

Sky Diary  |  Causes, Measuring Tornadoes, Tornado Safety

National Geographic: Forces of Nature  |  Animations, pictures, and more to explain what a tornado is, how tornadoes are caused, damage done

NOAA Tornado   |  The Basics of Tornadoes

Weather Wiz Kids  |  General information including some helpful diagrams on how tornadoes are formed

Tornado Chasers  |  Tornado Alley Information

Vortex 2  |  A scientific group who studies tornadoes

The Weather Channel  |  Basic Tornado Information

Tornado Alley Movie Site  |  Tornado Facts

The Red Cross  |  Tornado Safety Checklist

Forces of Nature  |  General Information on Tornadoes – Thanks Ryleigh!

Slate.com  |  When Tornadoes Collide Article – Thanks Christian & Brian

 

 

Adopt a city Weather Map Assignment

For the rest of our weather unit, we will occasionally record weather information from a city in the United States. When you have been assigned a city, visit this website HERE and record your information.

Part 1: Color your city and state on the US map.

Part 2: Record your information on the weather log

Part 3: Record the information for our city on your weather log.

Wind

windy-day-t6584Wind is the movement of air! It is produced by the uneven heating of the earth’s surface. In class we learned that thermal energy from the sun is absorbed and reflected by the earth and the surrounding air. This uneven heating causes a rotation/circulation of warm and cold air.

Cold air is more dense….

Particles in cold air move slower and are closer together. Because there are more particles in a smaller area the air becomes “heavy” or dense.

Warm air is less dense….

So it rises. Warm particles are moving faster and take up more space therefore they become less dense. Warm air expands.

The circulation of warm and cold air is called a convection current.

 

Air moves from High Pressure to Low Pressure.


EC Questions: PLEASE CHOOSE ONE
Why do sea breezes and land breezes blow in different directions?

What is the difference between a global wind and a local wind?

Why is Chicago known as the “Windy City?” (yes…. because it is windy….why?)

Can you describe one type of global wind?

What is the Coriolis Effect?

Choose another question about wind to ask other class members

Weather and the Atmosphere

During our weather unit, we will learn about several properties of matter and energy that are responsible for our weather conditions. The term weather describes the state of the air at a particular place and time – whether it is warm or cold, wet or dry, and how cloudy or windy it is, for example. All the Earth’s weather takes place in the lowest part of the atmosphere, which is called the troposphere.

Ths sun is the source of all the weather on Earth. Areas near the equator are heated more compared to areas near the two poles. Also gases in our atmosohere and types of surfaces on Earth absorb and reflect different amounts of light, some areas are warmer than others. This unequal heating of the Earth changes the density and pressure in the air. When these change, weather conditions occur.

There are many phenomena that make up our weather… Click the words below to read more.

Wind

Lightning and Thunder

Precipitation

Temperature and Humidity

Clouds

Think you know everything there is to know about weather? Take this quiz to test your knowledge! How many bowties can you get???

Another game to help you understand weather maps. After playing it, it was a little dull but I posted it anyway to see what you all think.

Yet another game to play. You can play this with your friends to see how smart you are. I think this was the best game I found so far.

On “The Weather Dude,” you can learn some silly weather songs. Hey Don’t laugh! Songs help you remember stuff!! I will give any group extra credit who wants to sing one of these songs to the class. You can even make up your own if you want!

My Air Pressure and Atmosphere Glog- By Kaitlyn H.

In Science class, we have been learning about the Earth’s atmosphere and air pressure. To help everyone gain more backup knowledge on this topic, I created a glog. A glog is an interactive poster that contains videos, links, and pictures on any topic you want.

On my glog, there is 2 pictures at the top of barometers. Barometers measure air pressure. Aneroid barometers are more common and they use a needle that points to the air pressure that is measured in “millibars.” Mercury barometers use “inches of mercury” to measure air pressure. When the air presses on the tray of mercury, the only place the mercury has to go is up the tube. So the amount of mercury up the tube is how much air pressure there is in the atmosphere.

In the middle of my glog, there is a chart that shows the altitude versus the air pressure. On this chart, it shows that the higher the altitude, the less air pressure in the atmosphere. When you go up a mountain for example, there’s less pressure pushing down on you versus when you’re at sea level when all the weight of the atmosphere is pressing down on you.

Under that, the far left picture and the middle picture which show the layers of  our Earth’s atmosphere. First, there’s the troposphere, which contains all our Earth’s weather. Next, is the stratosphere, that contains the ozone layer. The ozone layer keeps ultra-violet rays from hitting our planet. After that, comes the mesosphere, which burns up meteorites before they can hit the Earth. Finally, there’s the thermosphere, which extends all the way out into space.

The picture on the right, shows isobars. Isobars are used on weather maps to show air pressure measurements around the country. “H” stands for high pressure readings which means “happy” weather, sunshine and no clouds. “L” stands for low pressure readings which means “lousy’ weather, clouds, and rain.

Finally, there are two videos at the bottom. The first video shows an air pressure experiment using a can with hot water being dipped into cold water. Watch and see what happens! The second video is a Bill Nye the science guy clip on the Earth’s atmosphere.

I hope you enjoy playing with my glog and learn lots! You can make your own glog at <a href=”http://www.glogster.com”>www.glogster.com</a>

Visit my blog at: www.wmskaitlyn3.edublogs.org

Air Pressure

This week we learned about air pressure and our atmosphere. We talked about as the relationship between altitude, air pressure, and density and then performed mini-labs to demonstrate how air pressure works. These labs included…

1. Cartesian Diver

2. Baby food jar and a playing card

3. The Crushing Can

4. Egg in a bottle

 

On the image to the right, you see a mountain. What happens to the pressure of the airs as you go up the mountain? Think about the doggy/football pile I mentioned in class. Also think about how you feel when you swim in a deep swimming pool.

 

Can you explain what happened in our video below? How does this relate to pressure? HINT: What happens to the air molecules in the flask before and after the candle went out??

Let’s take our new knowledge a step further. Now that we know how air pressure works, we can inquire how wind, fronts, clouds, and storms are influenced by air pressure.

Students! Show me your technology skills.

I need your help! I have a presentation on November 8th to hundreds of local teachers about how student blogging has impacted learning in the classroom and how students can use technology to demonstrate their learning. According to new education standards, students must be able to demonstrate 21st century technology skills in their classes.

So this is what I need from you. I will be introducing these tools to you later in the year. If you’re great at using technology and think you can figure out how to use it yourself, try it! Follow this link or go to the Web 2.0 tools tab on the top of this page. Choose one of the tools and use it on one of your blog posts. Other tools we have already used can also be included such as polls, quizzes, videos, storybird, google documents, etc.

If you want your blog to be presented at our teacher in-service, post here with a link to your post.

 

Assignment #2: Wonders about the Weather

Have you ever wondered what causes tornadoes, wind, or rain? Why tornadoes are only in certain areas of the world or why do a lot of hurricanes develop in the fall? What is air pressure? What does a meteorologist due, anyway? These are all questions that many 7th graders have about weather. Your task today is to choose one question that you have always wondered about weather and research your answer. Once you have become an expert on your question, make a blog post teaching your readers about what you have learned.

Things to keep in mind…

  • Will your reader understand the purpose of the post?
  • Did you check your spelling and grammar? (you might want someone to proof-read your post)
  • Did you put your own opinions/thoughts in your post?
  • Did you include a picture?
  • Did a lot of other classmates choose the same topic as you? If so, you might want to pick something else
  • Did you include the link from where you obtained your information

How to get comments

  • Make your post unique (something most people don’t know)
  • Include a question for your readers to answer
  • Copy the link to your post (the POST link, not the link to your blog) on this post so people can see your topic