| Videos |
|---|
The Slow Race  A challenge that combines science, engineering, and creative thinking. |
Cloud Formation, Part 1  How clouds form, part 1 |
Making a Screamer  An obnoxious...I mean interesting way to study sound. |
Obedient Coin  Can you get the coin out from under the glass without touching it? Of course you can! |
Strange Flame, part 2  The answer to part 1. |
Scientific Thought and Creative Thinking, Part 1  A challenge in creative, scientific thinking. |
Scientific Thought and Creative Thinking, Part 2  Part two of Creative Thinking |
Scientific Thought and Creative Thinking, Part 3  Part three of the Creative Thinking series |
The Knuckle Trick  The answer to the Knuckle Trick challenge |
A Model of the Water Cycle  Make a scientific model of the water cycle. |
Science Friction  A simple friction challenge that might surprise you. |
How Heat Moves  Learn the three ways that heat energy can move. |
Sunglass Science: Birefringence  This time we will explore things that are usually invisible, revealing new things about the world around us. |
Sunglass Science: Polarized Light  Grab your shades for a different way of seeing the world around you. |
Water in a Glass, Part 3  The answer to Part 2, and a fun "science trick." |
Water in a Glass, Part 2  The answer to part 1, and a new challenge. |
Water in a Glass, part 1  What really keeps the water inside this inverted glass? |
Lighting a Bulb With a Balloon  Can you really light a lightbulb with a balloon? Of course you can! |
Science of Credit Cards  How is the information stored on a credit card, and why does putting a plastic bag over an old card make it scan better? |
Laser Projection Microscope  Turn a $5 laser pointer into a projection microscope! |
Pick a String  Pull downwards on the string, and use science to cause it to break either above or below the book. |
Smoke Rings  A simple way to produce beautiful smoke rings. |
Strengthening the Dollar  How can you make a dollar bill stronger? With science! |
Coins Through a Hole  Put a coin through a hole that is smaller than the coin, without tearing the paper! |
Making Water Wiggle  Make a stream of water move without touching it. |
Why Wet Things Turn Dark  Why does making something wet cause it to look darker? |
Relative Motion  How fast can you throw a piece of paper? |
Oxygen? No!  It is amazing how many books get this one wrong! |
Looking for Rainbows  The amazing science of rainbows. |
Heartless Plants  How do plants move water and food without a heart for a pump? |
Why Things Go Bang  Why do fire crackers make such a loud sound? |
Ice and String  Can you lift an ice cube out of a glass of water with a string? Try it and see. |
Measuring Lightning  Use the Flash-Bang method to measure how far away the bolt was, and how long it was. |
Noisy String  Learn about sound while annoying.. I mean amusing your friends. |
Hanging a Hammer  Can you balance a hammer, a ruler, and some string on the edge of a table? Of course! |
Planets and Pennies  Try this easy way to visualize how gravity differs from planet to planet. |
Bottle Tones, Part 2  The solution to the Bottle Tones video. |
Bottle Tones, part 1  How does mass relate to pitch? |
Candles in a Jar, Part 2  The answer to the last video's challenge. |
Candles in a Jar  Which will go out first, the tall candle or the short one? |
Ice and Soda  Try this old trick for pouring soda with less foam. |
Wrong Way Balloon  Why do balloons act crazy in your car? |
Doppler Effect  Why does the sound of a car change as it passes you? |
Hear the Ocean?  Why do you seem to hear the ocean inside a sea shell? |
The Science of Pizza  Is the cheese on a pizza really hotter than the crust? |
The Right Answer  Sometimes the right answer is not the only answer. |
Half a Water Balloon  Why is half a water balloon different from a full one? |
Got the Red Green Blues  Does your TV really only have three colors? |
Preview of Electricity DVD  Preview of Electricity DVD |
About Microwaves  Compare the way that a microwave oven heats water and other substances. |
Producers  Learn about the lifeforms that make up the base of the foodchain. |
The Compass and Magnetic Fields  Use the compass you constructed in Video 149 to explore magnetic fields, from electric wires to your kitchen cabinets. |
Grass Whistle  A fun science trick that my grandfather taught me. |
Emergency Glasses  Learn how to make quick, easy, emergency eyeglasses. |
Make a Compass  Construct a compass with household materials. |
The Singing Glass  Turn a drinking glass into a musical instrument. |
Floating Cups  Help figure out the science behind this simple trick. |
The Leyden Jar  Learn to construct a 25,000 volt Leyden Jar from materials found around the house. This dramatic, yet safe, demonstration is a |
The Science of Flutes  Learn about the science of sound as we see how a flute works. |
Tricky Bottle  Learn the science behind the Tricky Bottle! |
Why We Sweat  Why do people sweat? |
| HappyTone Launch |
Mirage  What is a mirage, and why do they happen? |
Going Through a Card  Cut a hole in a 4X6 inch index card that is large enough for you to crawl through. |
Flame Color  Why are candle flames yellow? |
Cartesian Diver  Make a diver that will rise and fall at your command, if you know the science. |
Mass and Weight  Why are mass and weight so confusing? |
Matter  What is matter? |
Light as Air  When we say that something is as light as air, what does that really mean? |
Strange Flame, part 1  Can you figure out why the flame moves backwards? |
Radioactive  What does it mean when we say that something is radioactive? |
The Cloud Chamber  A cool way to see evidence of subatomic particles. |
The Fire Diamond  What does it take for something to burn? |
Mobius Space  Can an empty space have only one side? |
Magic Coin  Use science to make a coin seem to magically rise from a matchbox. |
A Color You Can't See  Use your cell phone to see a color you can't see |
Balloon on a Stick  Learn the science behind this classic demonstration. |
Dry Ice  Learn some fun tricks with dry ice as we explore the science of sublimation. |
A Watched Pot  Who would think that there could be so much science in a pot of boiling water? |
Bird on a Wire  How can birds sit on powerlines without being shocked? |
Egg States  When is a change of state not really a change of state? |
Spoon Bells  Use simple science to make spoons sound like church bells. |
Making Craters  Make your own craters, and compare them with photos of the real thing. |
Density Column  How can something sink and float at the same time? |
Changing the Speed of Light  Can you really change the speed of light? Of course you can! |
Recycle  With Americans producing 600,000 tons of garbage a day, it is important to look at what we throw away. |
Spoon on Your Nose  Use science to stick a spoon to your nose. |
The Pool, the Boat, and the Anchor, part 2  The answer to video 111 |
The Pool, the Boat, and the Anchor  Do you really understand why things float and sink? |
Simple Circuit  Construct a simple circuit and use it to test conductors and insulators. |
Introduction to Light Emitting Diodes  Using LEDs as a way to get started learning about electricity. |
The Versorium  Construct a simple device for detecting static charges. |
Solar Power  A look at one of the world's largest solar power plants to learn about reflection and refraction. |
White Foam  If bubbles are clear, then why are soap suds white? |
Wax and Wood, part 2  The answer to the challenge. Did you get it right? |
Wax and Wood, part 1  We start by putting wood and wax into water, and watching them separate. The challenge is to get them to change places. |
Wonderful Water  Because it is so common, we forget how chemically bizarre water is. |
Iron Cereal  What do they put into breakfast cereal to give you your daily requirement of iron? |
The Bullroarer  Make this simple, science toy to learn about sound, while making sounds to annoy,..I mean amuse
your family. |
Static Charges  An introduction to induction. |
Why Wet Things Won't Burn  What is it about water that keeps things from burning? |
The Hottest Part of the Flame?  What is the hottest part of a flame? It may not be where you think it is. |
Chromatography  Can you tell which pen was used to write a message? Of course you can, if you know the science of chromatography. |
White Balance  Have you ever taken a photo that turned out very yellow or with a blue tint? Now you will know why. |
More Science of Balance  Make this fun, science toy, and learn more about how things balance. |
Raw Egg or Boiled?  Can you tell the difference between a raw egg and a boiled egg, without breaking the shell? Of course you can, if you know the s |
The Science of Balance  Understanding center of gravity and base can make it easier to balance. |
Light Speed Chocolate  Use chocolate and your microwave oven to measure the speed of light. |
Microwave Chocolate  Combine science and chocolate to learn how a microwave oven works. |
Air Space  How many cotton balls can you fit into a full glass of water? |
Ice Cream Science  Even in the desert, you can make a cold, tasty snack with some common items and a little science. |
Mystery of the Glassy Tube  How quickly can you figure it out? |
Identifying Minerals  Using simple tests such as luster, hardness, and cleavage/fracture, you can identify most common minerals. |
Floating Bubbles  Float bubble on a layer of invisible gas. |
Bernoulli Effect  A simple challenge that does not work the way you would expect. |
Sorting Salt and Pepper  Can you mix salt and pepper and then sort them out again? Of course you can! |
The Old Tablecloth Trick  Simple science behind a famous science trick. |
High Bounce  Bounce a tennis ball higher than your house, just by dropping it. |
Heating a Balloon  Can you really use a candle to heat water in a balloon without popping it? |
Crushed Can  How much air pressure is pushing on you at this moment? |
Mobius Strip  Explore the science of topology with scissors and a piece of paper. |
| Science Photos |
|---|
Science Photo of the Day #851 Energy does not just appear out of nowhere, so the potential energy of the lake water had to come from some other energy source. |
Science Photo of the Day #850 I photographed this oil refinery in New Mexico. How do they make gasoline from crude oil? |
Science Photo of the Day #839 This raven flies back and forth along the cliff behind our house all day long. Why does it fly beside the cliff instead of out |
Science Photo of the Day #838 I took this photo this morning while making the hike to the mailbox. What direction was I facing? |
Science Photo of the Day #832 I found these interesting marks in a tire track in our driveway. What produced them? |
Science Photo of the Day #816 I noticed that as things warm up, the snow often melts first around the base of plants. Why? |
| Looking at Changes |
Science Photo of the Day #806 The temperature this morning was 8° F. When I looked at the ice in our birdbath, it had a large lump sticking up on the right s |
Science Photo of the Day #800 Is boiling the same thing as evaporation? If not, what is the difference? |
Science Photo of the Day #795 How is the formation of frost different from most other kinds of ice? |
Science Photo of the Day #791 With the cold weather, a large number of mule deer have moved into the canyon. Why are their eyes glowing in this photo? |
Science Photo of the Day #784 Seconds after I took the previous photo, I took this one of the same bird. Notice that the Hummingbird's throat has changed col |
Science Photo of the Day #776 Most people have seen clouds that let spotlights of sunlight shine through. Although it is a familiar sight, most people don't |
Science Sound of the Day #2 What is making this sound? |
Science Photo of the Day #754 Could you accurately measure the mass of an object in free fall, where its weight did not register at all? If so, how? |
Science Photo of the Day #752 Does adding heat to something always make it hotter? |
Science Photo of the Day #751 What is wrong with this scale? |
Science Photo of the Day #750 Refraction causes the handle of the spoon to appear to be broken at the surface of the water. What causes refraction? |
Science Photo of the Day #744 Looking back in history, it has not been that long since people relied on the Sun and fire as sources of light. Who invented th |
Science Photo of the Day #743 Incandescent light bulbs transform electrical energy into light and heat energy. With a normal incandescent bulb, what percenta |
Science Photo of the Day #741 This is a clear pool of water. What caused the strange dark spots on the bottom? |
Science Photo of the Day #737 These are electric cells (not batteries.) From left to right, the sizes are AAA, AA, C, and D. All four produce the same volta |
Science Photo of the Day #735 These needle shaped ice crystals were sticking up out of the ground. How did they form? |
Science Photo of the Day #733 We can use wind energy to produce electricity, but where does the wind get its energy? |
Science Photo of the Day #727 For many years, educators taught about the Fire Triangle, showing that for something to burn, it needed fuel, heat, and oxygen. |
Science Photo of the Day #721 When you mix cornstarch and water, you get something that many science sites call Oobleck. Under pressure, it feels like a soli |
Science Photo of the Day #719 While many parts of Death Valley are below sea level, there are places where the ground is exactly at sea level. If you compared |
Science Photo of the Day #14 Why is this Blue Jay blue? |
