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Archives for 2010

Zero Gravity-Weightless?

By Janice VanCleave

Can passengers in NASA’s Vomit Comet Float Around in a state of weightlessness? Yes, passengers in the plane can float during the ride but only for short periods lasting only about 30 seconds. Only in orbiting space craft do astronauts continuously float. In the KC-135, commonly called the Vomit Comet for obvious reasons, there are […]

Filed Under: Physics

Starch Digestion in Your Mouth

By Janice VanCleave

Digestion is the process by which your body changes the food you eat to forms that your body can use for repair, building, and energy. Digestion starts in your mouth where special digestive juices change starch into sugar. Starch is a large chemical generally stored in plants and sugar is a type of chemical that […]

Filed Under: Biology, Science Projects Tagged With: starch test

Evaporation: Cools Skin

By Janice VanCleave

Evaporation Evaporation is a change from a liquid to a gas. Evaporation occurs below the boiling point of the liquid. This means that water will evaporate a temperatures below 212 degrees Fahrenheit (100 degrees Celsius). Activity Wet a cotton ball (or sponge) with water. The objective is to wet a small place on the skin, […]

Filed Under: Chemistry Tagged With: chemistry, cool, Energy, evaporation

Butterfly: Open Wings

By Janice VanCleave

Butterflies are  cold blooded. This means they must warm themselves in sunlight. When a butterfly is chilled, it opens its wings as shown in the photo. This allows sunlight to warm each part of their wings.

Filed Under: Biology Tagged With: animal, butterfly, cold-blooded, insect

Sound: Blowing a Raspberry

By Janice VanCleave

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.

Filed Under: Physics, Sound Tagged With: blowing a raspberry, flatulence, SOUND, vibration

Zoology Project Ideas

By Janice VanCleave

Research Select a topic that you find interesting, then learn as much as you can about it. This is called RESEARCH. Research is done by reading as well as by asking people in the know, such as your teacher, parents, librarian, etc… If you can think of an experiment to answer the questions, then you […]

Filed Under: Science Projects

Astronomy Science Project

By Janice VanCleave

Overview for an Astronomy Project Your entire project is about a science question you choose to solve. Thus, the project question is very  important. The following gives you a “bird’s eye view” of how to select an astronomy question and how to evaluate the question. I. RESEARCH A. “Tinkering” Research or ” I Don’t Know […]

Filed Under: Astronomy

Cohesion: Surface Tension

By Janice VanCleave

The water drops at the end of the stream form due to the cohesion between the molecules particularily the surface tension of the surface water molecules.

  What is Cohesion and How does it Relate to Surface Tension Cohesion is the attraction that like- molecules have for each other. Water molecules have an attraction for each other. This attraction is called cohesion. Surface Tension Surface tension is the skin-like surface of a liquid due to the cohesive forces between the liquid […]

Filed Under: Chemistry Tagged With: cohesion, rain drops, sphere, surface tension

Sound Facts

By Janice VanCleave

Sound is a form of energy produced by the vibrations (back and forth or to and fro motions) of a material. Sound is energy that can be heard by the human ear. It takes energy to produce a sound. For example, the test tubes shown in the photo are filled with different amounts of colored […]

Filed Under: Physics

Engineering Project Winner

By Janice VanCleave

GARRETT YAZZIE Garrett participated for the first time in the third annual Arizona American Indian Science and Engineering Fair (AISEF). He made a solar powered heater out of aluminum cans and a car radiator from an old Pontiac, which he found at a junkyard. He says his mother and his science teachers influenced him the […]

Filed Under: Engineering

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Welcome to Janice’s Science Extravaganza!

The spoon hanging from the string vibrates when struck and these vibrations are transmitted through the string and the sound is amplified by the plastic cups. ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years. MORE.....

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