What is Sound? How is Sound Produced? Sound is a form of energy, just like electricity and light. Sound is produced when something, like a guitar string vibrates (moves back and forth) when strummed. With each back and forth motion of the string, the air around the string is pushed outward on one side and […]
How Energy Affects States of Matter
What Happens When A Substance Gains or Loses Energy? For this article, heat will be the energy source and water molecules the substance gaining or losing energy. So, what happens when water molecules gain or lose energy? Energy is needed for motion, the more energy a substance has the faster is its motion. The reverse […]
ROY G. Biv
The rainbow colors are so spectacular. Notice that the rainbow colors are always in the same order. R is for red light, which is light with the least energy.O is for orange light.Y is for yellow light.G. is for green light.B is for blue light.I is for indigo light.V is for violet light, which is […]
Musical Bottles
Using bottles to make music is fun for kids of all ages. The best presentation I’ve heard were seniors who played “Lean on Me” and along with the music from the various bottles, one student added a drum beat by tapping on the lab table. It really was awesome–too long ago for me to have […]
Solar Energy
Passive Solar Heating VS. Active Solar Heating Solar energy is radiant energy from the Sun. This energy travels through space to Earth in the form of electromagnetic waves. In an hour, the Sun sends to the earth’s surface as much or more energy as people use to run factories, machines, and vehicles and to heat […]
Sound: Blowing a Raspberry
Blowing a Raspberry means to make a sound by sticking out your tongue and blowing. The sound produced is much like the sound made by flatulence (farting). Sounds are made when something vibrates and air blown between your tongue and lips causes both to vibrate as seen in the video.
Sound: Pitch vs. Loudness
Things that vibrate send out sound waves. Characteristics of sound include, pitch, loudness, and quality. The pitch of a sound is how high or low a sound is. Pitch is basically your ears’ response to the frequency of a sound. Note: Original Art and more information found here: Mediacollege.com How Sound Works. Snagit and Snagit […]
Sound: Clucking Chicken
A noise-maker that sounds much like a clucking chicken as well as a crowing rooster can be made using the following steps. 1. Using a 16-ounce (480–ml) yellow plastic cup, ask an adult to punch two holes in the bottom of the cup. This can be done with an ice pick or other sharp pointed […]
Positive and Negative Charges
The American scientists and statesman Benjamin Franklin (1706-1783) named the two natural forms of electric charges. He called one a positive charge and the other a negative charge. A charge (electric charge) is the property of subatomic particles within atoms that causes a force between the particles. The force between charged particles is called an […]
Flame Colors:Photons
When you see colors, it is because some form of visible light has entered your eye and was absorbed by special light sensitive cells inside your eyes.