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Physics: Newton’s Third Law of Motion

By Janice VanCleave

Hero’s Engine Newton’s third law of motion says that for every action there is an equal reaction in the opposite direction. The spinning cup in the diagram is an example of this law. The Action-Gravity forces the water in the cup out of the straws in the cup. The direction of the water is determined […]

Filed Under: Physics

Math: Reflection

By Janice VanCleave

When you look in a mirror, you see your reflection, which is a left-to-right reverse image of you. In the photo the baby is pressing his right hand against what appears to be the left hand of his twin. Reflection is a math term that refers to the mirror image of a figure that has […]

Filed Under: General Science

Geography: Landforms/Basin

By Janice VanCleave

The term basin is used for many things, one being a wash basin used to hold water. With indoor plumbing, basins were replaced with what is now called sinks. When you think about it, the word sink describes every type of basin in that they all sink down from their top. Other characteristics: basins are […]

Filed Under: General Science

Chemistry: Reactions

By Janice VanCleave

Question: Why does Alka-Seltzer fizz in water? Answer: Alka- Seltzer is a combination of dry chemicals: aspirin: citric acid sodium bicarbonate All of the chemicals dissolve in water. When the citric acid and the sodium bicarbonate dissolve, they can then react with each other. Citric Acid + Sodium Bicarbonate    -> yields->    water + […]

Filed Under: Chemistry

How Flowers Attract Butterflies

By Janice VanCleave

How to Attract Butterflies
Facts and investigations that can be used to design a science project about attracting butterflies.

Filed Under: General Science Tagged With: Insects

States of Matter:Enthalpy

By Janice VanCleave

The three states of matter that are most often studied are gas, liquid, and solid. In the diagram is a fourth state of matter, plasma, which is much hotter than the gas it forms from. Notice that that only plasma can only be formed when a gas is ionized (changed into charged particles). To make […]

Filed Under: Physics

Chemistry Matters

By Janice VanCleave

Matter is a science term that basically encompasses all the stuff in the universe that has mass and takes up space. Generally, only three forms of matter are studied: solids, liquids, and gases. There is a fourth natural form of matter called plasma. This is not the stuff in your blood, instead it is hot […]

Filed Under: Chemistry, General Science

Physics: Series Circuit

By Janice VanCleave

Question: What is a series circuit circuit? Answer: First, let me define a few words: electricity: Electrical energy circuit: Path through which electrical energy passes. series circuit: A circular path through which electricity passes. As defined, a series circuit is one large circle through which electricity passes. Look at the diagram of the series circuit. […]

Filed Under: General Science, Physics

Soap Bubbles

By Janice VanCleave

Question: Why doesn’t water form bubbles? Answer: Cohesion is the force between molecules that are alike, such as between water molecules. The cohesion between water molecules too strong to allow the water to form bubbles. The bubbles shown in the photo are made with a solution of soap and water. The soap reduces the force […]

Filed Under: Chemistry Tagged With: adhesion, cohesion, soap bubbles, surface tension

Astronaut Waste: Shooting Stars?

By Janice VanCleave

shooting-star

Question: On Earth, gravity causes body waste to be pulled down into the potty. In space, what happens to the body waste of  astronauts? Answer: Urine is collected, recycled and the water extracted is potable, meaning it is drinkable. According to NASA, feces is collected and ejected from the space craft. No! Poop is not […]

Filed Under: Space Tagged With: astronaut poop, waste disposal

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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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