Science

Heron's Fountain is regarded as an example of perpetual motion because hydrostatic pressure changes from sealed containers can produce a continuous flow of water as fluid and pressure are...

Chemistry glassware is produced either through casting glass or blowing glass. In the casting process, the molten glass is poured into a mold, allowed to cool, and then removed from the mold....

A perpetual motion drinking bird is powered by the heat differential between its head and tail. In an upright position, the felt bill of the bird is wetted, cooling it by evaporation. The...

High school biology courses offer an introduction to many topics in the life sciences. Students will learn about life starting at the cellular level. Other topics covered include ecology with...

Grease guns move lubricant from a prefilled tube cartridge into bearings. The grease is packed into presized tubes and inserted into the grease guns. Manual type grease guns shoot a predetermined...

There are two types of mercury thermometers. The first type of thermometer either measures the temperature, indoors or out. Used in medicine, the second type of thermometer measures body temperature.

Radiation--which is invisible to the human senses--was discovered in the late 19th century. Scientists and researchers needed to investigate this phenomenon, which led to the invention of devices...

Whether for commercial-scale production or a school science demonstration, the simplest way to produce hydrogen gas is through the electrolysis (literally "separating through electricity") of...

Although today the name bazooka is synonymous with any shoulder-held rocket launching device, the first bazooka was the U.S. Army's M1 Rocket Launcher. Introduced in World War II, soldiers using...

The sticky female part in the center of the flower is called the stigma. A long tube called the style connects the stigma to the ovary, which contains a number of ovules, each of which contains...

Hydrogen gas, with the chemical formula H2, is a colorless, odorless and highly flammable gas. Hydrogen is lightest of all known gases and the most abundant element in the universe. Hydrogen has...

A siphon is a device that moves a liquid from a reservoir to a receptacle at a lower level. The primary difference between a siphon and a drain is that the siphon has an intermediate section...

Hydrogen gas, with the chemical formula H2, is a colorless, odorless and highly flammable gas. Hydrogen is lightest of all known gases and the most abundant element in the universe. Hydrogen gas...

Oxygen is a chemical element with the formula O2. It is a odorless, colorless gas. Chemically, oxygen oxidizes the majority of other elements and organic compounds forming oxides; for example,...

The heat of the sun powers a solar cooker. There are different types of solar cookers, but all work on the principle of capturing the sun's heat and focusing it onto a cooking vessel filled with...

The Geiger counter, invented in the early 1900s, is an essential tool for safely managing radioactive materials. It's rugged, portable, and simple to operate. As with most equipment, its best...

An anemometer is a device used to measure the speed of the wind. As with many scientific inventions, it's hard to pinpoint the first person to invent an anemometer. Sometimes the first inventor...

All atomizers work on the principle of air flow and suction. When horizontal air passes over a vertical tube, it causes the air and liquid inside the vertical tube to be pulled upward. Classic...

A siphon is a tube that pulls fluid up out of one container and transfers it to another without a pump. There can be no air in the tubing used as a siphon or the fluid will stop transferring....

In the middle of the 19th century, scientists had begun to observe that certain rocks glowed when a current of electricity was passed through them. In 1856, a mercury vacuum pump was invented by...

DNA (deoxyribonucleic acid) extraction is a process with many vital scientific applications. In research and medicine, its uses include DNA sequencing, detection of viruses and bacteria, and the...

Sometime in the 1920s, a car dealership was the first enterprise to use a neon sign. The signs then became very popular in the next two or three decades. They were an especially popular in Las...

A manometer measures the difference in air or liquid pressure by comparing it to an outside source, usually a sample of Earth's atmosphere. There are several types of manometers, the simplest...

In order for a microwave oven to properly operate, it requires the use of an internal high-voltage system. This system works by taking the line voltage supplied by the outlet and, through a series...

Liquid pressure gauges are used in a variety of applications and settings. Industrial environments where coatings and sealants are applied on a regular basis rely on a gauge's readings to ensure...

Vacuum flasks are used to separate liquids from solids when used in conjunction with a filter in the mouth on top of the jar. Vacuum flasks typically will have a small mouth opening and will allow...

Counting bacteria may seem like a task without purpose, but it is valuable in that it allows scientists and doctors to determine how fast a bacteria is replicating and how potentially dangerous...

Alpha and Beta radiations are surprisingly abundant in nature. The third variety of radiation, Gamma, is more commonly associated with artificially produced radioactivity. The one device suitable...

Kids love scientific experiments with actual results, and there is almost no other with such exciting results as making hydrogen-filled balloons. With a little preparation, this experiment is...

A spirometer is an instrument used to measure lung capacity. Spirometers are used by medical professionals to test the breathing of patients with asthma or other lung disorders. When the patient...

Parents and teachers can demonstrate to children that when certain chemicals are combined they can produce a reaction. One of these reactions causes the liquid to begin to glow in the dark....

Doctors use spirometers to measure lung capacity. The patient blows into the spirometer, and it measures how much air she can inhale and exhale. Building a spirometer is an interesting activity to...

A cathode ray tube consists of an electron gun, focusing coils, and X and Y plates. Learn how a sawtooth works in a cathode ray tube with information from a science teacher in this free video on...

Build a basic solenoid that you can use to push or pull a magnetized rod, charge a magnet or generate electricity. The solenoid can be used to magnetize your screwdrivers to keep screws from...

A Geiger counter is what most people mean when they think of a radiation detector. This device uses a Geiger-Müller tube as the sensor. This tube is filled with an inert gas that becomes...

Thomas Edison, who invented the light bulb, was experimenting with his carbon filament lamp in 1883 when he discovered that inserting a piece of metal into the top of the bulb when the filament...

When making a volcano for a science fair or school project, the combination of baking soda and white vinegar is often used to make that volcano erupt. However, that's not the only way to create an...

Build a science project using Popsicle sticks, a can and a small motor to show other students that you can make renewable energy. If your teacher does not have an ammeter to measure the current...

If you are the kind of person who is interested in making things at home rather than just purchasing them at the store, this project will be right up your alley--making a glow stick out of basic...

Make a motor at home out of a few easily-available parts. This motor is housed in a toilet tube and uses scrap booking rivets for a pivot point. The wire is simple copper wire available at...

It is possible to build your own projector out of cardboard that will play movies on a wall or screen. You will need other objects besides the cardboard, like a lens of some sort and a video...

If you've ever wanted to impress your friends or just have some fun then making diet coke erupt due to mentos candy (of the mint variety)then this is the article to check out!

A borescope is the instrument that helps plumbers see inside pipes and helps doctors see inside a person's stomach or colon. They are useful for anyone who needs to get a real-time picture of...

Sometimes it is necessary to calculate the number of cubic feet in a tube. Because the words "cubic feet" denote squares and tubes are circular, it requires a bit of math to figure this out. This...

The reservoir is the large portion of the perfume bottle that holds the perfume. The perfume is pulled out of the reservoir using a vacuum, either from direct pumping, such as in a conventional...

Air pressure falls when the weather is changing for the worst, and rises when it is getting better. This is because humid, wet air is heavier than dry air. Barometers are instruments that measure...

A barometer uses water, air, or mercury to measure atmospheric pressure (or weight of the air). Barometers are used to forecast short-term changes in weather and analyze weather phenomenon such as...

Telescopes are divided into two basic categories: reflectors and refractors. Both gather and focus light to magnify images. The reflector telescope is designed with a concave primary mirror at the...

Smoke bombs are an American pastime and a lot of fun. Here is an easy recipe so that you can create your own.

X-rays were discovered accidentally while studying cathode rays. Scientists over the years made adjustments to the technology and improved the implementation of X-rays for medical use. However, it...