Janice VanCleave's Play and Learn About Science
Sodium Chloride is a compound made of two elements, sodium and chlorine. The common name for sodium chloride is Table Salt. There are different varieties of table salt. Some differ in additives, while others differ in how they are processed, which affects their texture. Table Salt (iodized) Most table salt in the United States is [...]
Research Information This is great video for providing background information about using red cabbage juice as an acid/base indicator. Suggestion: 1. An easier way to extract the juice from the red cabbage is to cut a head of red cabbage in half. Put the two pieces in freezer bags, and then place the bags in [...]
Question from Anthony & Glynnis How many Alkaseltzer tablets can dissolve in water? Facts to Consider: AlkaSeltzer + water produces water + salt + carbon dioxide gas The carbon dioxide gas escapes leaving the salt dissolved in the water, this is called a salt solution. Saturated Salt Solution = A solution made by adding salt [...]
How to Calibrate a pH Scale for Red Cabbage Juice The scale shown was calibrated by KBolden. It gives you an idea of what a completed scale might look like. Notice that at the top and bottom of the scales, the color appear to be too make a distinction. If you get a color scale [...]
This challenge is to separate and collect the individual parts of a mixture. Make the Mixture: Combine equal amounts of table salt and sand. One-fourth cup of each will work. Teacher Tip: Be sure to use sand and not dirt. Part of the dirt will dissolve. You want only sand, which does not dissolve in [...]
Buoyancy is an upward force on an object that is floating or submerged in a fluid (liquid or gas). The upward force of buoyancy on the boat in the picture is equal to the weight of the water displaced by the boat. WOW!! That sounds complicated, but it isn’t. In the diagram below, there are [...]
Chemistry is the study of the composition of substances and their properties and reactions. Baking a cake is a great way to study physical and chemical properties as well as physical and chemical changes. First, I’ll list a few terms that will be introduced: physical properties: The physical traits of a substance determined by using [...]
Cohesion Cohesion is the attraction that like molecules have for each other. Liquid water molecules have an attraction for each other. The attraction between the water molecules is called cohesion. Surface Tension Surface tension is the skin-like surface of a liquid due to the cohesive forces between the liquid molecules. The molecules of liquid at [...]
Changes in temperature can change matter from one state to another. For example, if ice (solid) is heated it melts, meaning it changes from the solid state to the liquid state. The diagram shows the molecules of a solid (ice) close together and farther apart in the liquid state. Further heating results in the vaporizing of the [...]
I love Meet Me At The Corner videos. They all present information via an interview with someone in the know. The Chemistry of Perfume for Kids video contains an interview with a perfume maker. He has lots of interesting facts about perfume, such as: At one time people put perfume on their gloves. These scented [...]