VanCleave's Science Fun

Your Guide to Science Projects, Fun Experiments, and Science Research

Archives for 2010

Atmospheric Pressure

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Atmospheric Pressure The force of air molecules pushing on a surface Also called air pressure or barometric pressure. Air A mixture of gases containing about 78% nitrogen, 20% oxygen, and 2% other gases including carbon dioxide and water vapor. Gas molecules are separate from each other and in constant motion. Words to Know air air pressure […]

Altitude Sickness

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Something to Think About 1. The Dallas Cowboys football team plays the Denver Broncos in Denver. Why does the Dallas football team have problems breathing when they arrive in Denver? Answer: The cowboys are use to the density of the air in Dallas, which is at an altitude of about 500 feet above sea level. […]

Dust Mites

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Question: Where do dust mites live? Answers: Dust mites are microscopic organisms that feed on human dander (dead skin). They thrive in humid, warm environments. The perfect home for dust mites is in your home. They love areas such as carpet, mattresses, pillows, blankets, curtains, and upholstered furniture.In other words, dust mites live where you […]

Air Pressure

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What is air pressure? Pressure is a measure of a force on a specific area of surface. Air pressure is the force of air on an area of surface.This is a good definition, but it doesn’t tell you what’s happening. So here is the nitty gritty about how I understand the cause of air pressure: Air […]

Symbiosis: Butterflies & Flowers

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Butterflies and Flowers The  relationship between butterflies and flowers is called symbiosis. Symbiosis: A relationship between two organisms in which the organisms benefit from one another. How Butterflies benefit flowers. Butterflies pollinate flowers, which means they transfer the flower’s pollen from one place to another and even from one plant to another. Pollination results in […]

Why Your Ears Pop

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Question: Why are airplanes pressurized to maintain a normal atmospheric pressure on the passengers’ bodies? Answer: The internal pressure of your body is accustomed to air pressure where you live. At the altitude that airplanes travel, the pressure is much lower than your internal body pressure. Should the pressure on the outside of your body […]

Scale Model:Solar System

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Solar System Scale Model A. Planetary Distances: A scale of 1 cm:5×106 km (1 cm : 5 million km) can be used to make a model for for planetary distances. To calculate the model distance of planets to the Sun divide the actual distance of the planet by 5 million km. The answer will be […]

What is Table Sugar?

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Table sugar is commonly used to sweeten food. There are different kinds of sugars, including glucose, fructose, and sucrose. Glucose is commonly called blood sugar; fructose is sugar in fruit; sucrose is table sugar.  Sucrose is a carbohydrate, which is a chemical made of carbon, hydrogen and oxygen. Sucrose molecules contain 12 atoms of carbon, […]

Humming

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To talk, sing, hum or to make any sound, air passes between the vocal cords in your throat and causes them to vibrate. Air can escape through your mouth and/or nose when you talk. Can you hum with your nose closed? How about with your mouth closed? Discover for Yourself 1. Hum a tune with […]