Movie courtesy of the Little Shop of Physics.
Snuff It! with CO2
This episode of "Science It Up!" from the Little Shop of Physics demonstrates how carbon dioxide gas is more dense than air. To show this, they snuff out the flames of candles invisibly - with the help of some "dry ice". You can't see their carbon dioxide gas, but you can prove that it's there when you watch the flames go out.
Right-click (Windows) or Option-click (Mac) here to download a copy of this video in QuickTime format.
Click here to learn more about the Little Shop of Physics.
You might also be interested in:
Carbon dioxide is a colorless and non-flammable gas at normal temperature and pressure. Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent
...moreRainbows appear in the sky when there is bright sunlight and rain. Sunlight is known as visible or white light and is actually a mixture of colors. Rainbows result from the refraction and reflection of
...more The Earth travels around the sun one full time per year. During this year, the seasons change depending on the amount of sunlight reaching the surface and the Earth's tilt as it revolves around the sun.
...moreScientists sometimes travel in specially outfitted airplanes in order to gather data about atmospheric conditions. These research aircraft have special inlet ports that bring air from the outside into
...moreAn anemometer is a weather instrument used to measure the wind (it can also be called a wind gauge). Anemometers can measure wind speed, wind direction, and other information like the largest gust of wind
...moreThermometers measure temperature. "Thermo" means heat and "meter" means to measure. You can use a thermometer to measure the temperature of many things, including the temperature of
...moreWeather balloons are used to carry weather instruments that measure temperature, pressure, humidity, and winds in the lowest few miles of the atmosphere. The balloons are made of rubber and weigh up to
...more