Density is a type of conversion factor that compares the mass of a specific volume. The basic metric unit for mass is gram, g.The basic metric unit for length is meter, m.The basic metric unit for volume is L or m 3. Use the density of calcium, Ca, found at Dynamic Periodic TableConvert the units of […]
Temperature Changes Within Earth’s Atmosphere
Earth’s Atmosphere can be divided into four layers with distinct changes in temperature as the altitude increases. Starting at Earth’s surface, these layers are: Troposphere: As the altitude increases, the air temperature decreases. The troposphere is hotter near the Earth’s surface because heat from the Earth warms this air. As the altitude increases the number of […]
Food Web
The arrows in a food chain are drawn from the food source to the food consumer. The arrow is a symbol for the words–“Eaten by.” In other words, in the diagram, the little fish is eaten by the medium size fish and the medium size fish is eaten by the big fish. A food chain […]
Sock Classification
My feet get very cold, and I wear warm socks most of the time. Yesterday, I managed to put on two different socks. Since my office is in my home, I didn’t care if the socks matched. But, later in the day my husband needed me to attend a business meeting with him. YEP! I […]
Hidden Colors
Paper Chromatography Chromatography means to write with colors. Chromatography is a chemical process of separating mixtures of colorants. The first video below demonstrates the following Paper Chromatography procedure steps. The video also has a craft idea for making a butterfly using the colored paper filter.The second video below provides information about paper chromatography as well as more […]
Energy Ball: Science Challenge
The Energy Ball is a fun, easy, and safe way to introduce kids to electric energy. On the outside of the Energy Ball are two metal strips. If you touch these strips with your fingers, the ball will flash a red light and buzz. This happens because something inside the ball produces an electric current […]
Science Fair Projects: Parents Do’s & Don’t
Do’s and Don’ts 1. Do Be Positive. If you hated science when you were in school, now is not the time to discuss it. It takes time to design, develop, and prepare a display for a science fair project. So, it’s important to start on a positive note. 2. Don’t help too much. Remember that […]
Hair Color
Have you ever seen a dog with pink hair?I have! FYI: The Maltese dog shown had white hair before my granddaughter dyed its hair pink. The genetics of hair color is very complex. In the most simplistic sense, hair color from black to white depends on a pigment called eumelanin. The amount and type of […]
Chameleon Dyes
Chameleon Dyes Note: I am revising the following information. I had the opportunity to speak with one of the directors of LCR Hallcrest, a company that makes chameleon dyes. The pencils in the picture are called chameleon pencils. While chameleons change colors in response to different stimuli, such as temperature, emotions, and illness, the dye […]
Why Autumn Leaves Fall
Deciduous tree leaves fall in autumn due to a breakdown in cells connecting the leaves to stems. The decreased sunlight in autumn produces a chemical that destroys the connecting cells.
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