Read Online Everything Kids' Magical Science Experiments Book by Tim Robinson - Free Book Online
Authors: Tim Robinson
Tags: epub, ebook
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combinations are known as chords.
Notes on a piano are grouped into octaves. Do you think that if you chose a different octave, with its associated frequencies, the note pairings that sound nice together would stay the same? Why or why not?
Demo version limitation
Demo version limitation
8
Wind and Weather
E ach night on the news, a meteorologist presents the day's weather and gives predictions for the next day. In that report, viewers often hear about high and low temperatures, winds, and any rain or snow that may have fallen. You may hear people talk about temperatures, wind speeds, and rain, but do they really know what weather is all about? This isn't a book about weather, but in this chapter, you will explore air and how it behaves in all kinds of situations. You will create an air cannon, seal a leaking balloon, make cereal float, and create an imploding time bomb.
Try This: Air Cannon
Some people hear the word cannon and automatically think about something violent, used in times of war or for celebrating a score at an athletic event. But this cannon is perfectly safe and can actually help you impress your friends while performing some amazing feats.
Question: How can you blow out a candle from across the room?
Science Online
The original air cannon was called the Air Blaster, made by the Wham-O toy company. It was introduced in 1965, and you can learn more about Wham-O at their Web site. Follow the âAbout Usâ link to read about the company's long history of innovative toys: www.wham-o.com.
Materials
Clean 8-ounce yogurt container
Adult helper
Scissors or knife
Medium balloon
Rubber band
Lit candle
Procedure
Ask your adult helper to cut a small hole in the bottom of the yogurt container. The hole should be approximately one-half inch in diameter.
Cut the mouth off the balloon and stretch it across the top opening of the yogurt container. Secure the balloon to the mouth of the container with the rubber band.
Tap on the balloon to produce a small burst of air out the hole in the bottom of the container.
Bring your air cannon near the candle and tap on the balloon until you can make the candle go out.
The Science Behind the Magic
When you tap on the balloon, you compress all the air in the container. As the volume of the air decreases, the pressure inside the container increases. All that air has to go somewhere, so it gets pushed out the hole in the bottom. As the air passes through the small hole, it picks up speed. The air comes out of the hole as a vortex, and it tends to keep its form and can travel surprising distances across a room.
Follow-Up
See how far you can move from the candle and still blow it out using your air cannon. Some cannons have been known to work from across an entire room. You can also set up paper cups on a table as targets and practice knocking them over. Be careful when using your air cannon around people or pets, however. An unexpected blast of air is not always a welcome surprise. Several versions of this air cannon are possible, including one you can purchase at many toy stores. But you can experiment with building larger versions yourself. You can try using a tin can, such as one that would hold soup, vegetables, or dog food. Or you could use a larger can, such as one that would hold canned tomatoes. If you really want to upgrade your air cannon, try making one out of a plastic bucket or garbage can. You will need to experiment with various materials in place of the balloon, but the larger you make your cannon, the farther its bursts of air will travel.
Bowling with Air
This young scientist used an air cannon to knock over three towers of paper cups. With which tower did she get the highest score? Count only the paper cups that have fallen on the table.
Extra Fun: If the scientist tries again, and knocks over two more cups in each tower, what is the highest score she can get?
Try This: Floating Cereal
Cereal is a common breakfast food, one that is quick and easy, and
Notes on a piano are grouped into octaves. Do you think that if you chose a different octave, with its associated frequencies, the note pairings that sound nice together would stay the same? Why or why not?
Demo version limitation
Demo version limitation
8
Wind and Weather
E ach night on the news, a meteorologist presents the day's weather and gives predictions for the next day. In that report, viewers often hear about high and low temperatures, winds, and any rain or snow that may have fallen. You may hear people talk about temperatures, wind speeds, and rain, but do they really know what weather is all about? This isn't a book about weather, but in this chapter, you will explore air and how it behaves in all kinds of situations. You will create an air cannon, seal a leaking balloon, make cereal float, and create an imploding time bomb.
Try This: Air Cannon
Some people hear the word cannon and automatically think about something violent, used in times of war or for celebrating a score at an athletic event. But this cannon is perfectly safe and can actually help you impress your friends while performing some amazing feats.
Question: How can you blow out a candle from across the room?
Science Online
The original air cannon was called the Air Blaster, made by the Wham-O toy company. It was introduced in 1965, and you can learn more about Wham-O at their Web site. Follow the âAbout Usâ link to read about the company's long history of innovative toys: www.wham-o.com.
Materials
Clean 8-ounce yogurt container
Adult helper
Scissors or knife
Medium balloon
Rubber band
Lit candle
Procedure
Ask your adult helper to cut a small hole in the bottom of the yogurt container. The hole should be approximately one-half inch in diameter.
Cut the mouth off the balloon and stretch it across the top opening of the yogurt container. Secure the balloon to the mouth of the container with the rubber band.
Tap on the balloon to produce a small burst of air out the hole in the bottom of the container.
Bring your air cannon near the candle and tap on the balloon until you can make the candle go out.
The Science Behind the Magic
When you tap on the balloon, you compress all the air in the container. As the volume of the air decreases, the pressure inside the container increases. All that air has to go somewhere, so it gets pushed out the hole in the bottom. As the air passes through the small hole, it picks up speed. The air comes out of the hole as a vortex, and it tends to keep its form and can travel surprising distances across a room.
Follow-Up
See how far you can move from the candle and still blow it out using your air cannon. Some cannons have been known to work from across an entire room. You can also set up paper cups on a table as targets and practice knocking them over. Be careful when using your air cannon around people or pets, however. An unexpected blast of air is not always a welcome surprise. Several versions of this air cannon are possible, including one you can purchase at many toy stores. But you can experiment with building larger versions yourself. You can try using a tin can, such as one that would hold soup, vegetables, or dog food. Or you could use a larger can, such as one that would hold canned tomatoes. If you really want to upgrade your air cannon, try making one out of a plastic bucket or garbage can. You will need to experiment with various materials in place of the balloon, but the larger you make your cannon, the farther its bursts of air will travel.
Bowling with Air
This young scientist used an air cannon to knock over three towers of paper cups. With which tower did she get the highest score? Count only the paper cups that have fallen on the table.
Extra Fun: If the scientist tries again, and knocks over two more cups in each tower, what is the highest score she can get?
Try This: Floating Cereal
Cereal is a common breakfast food, one that is quick and easy, and
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