#423 Why are there twelve months in a year?
Why are there twelve months in a year? Because it is the closest match to the number of times the moon orbits the Earth in a year. Before there were…
Why are there twelve months in a year? Because it is the closest match to the number of times the moon orbits the Earth in a year. Before there were…
What causes quicksand? It forms in saturated loose sand when the sand is suddenly agitated. Quicksand is an example of a non-Newtonian fluid. That means it is a liquid, but…
How many revolutions has France had? France has had three revolutions and they are currently on their fifth republic. The first revolution was the big one. The one we learn…
What is in toothpaste? It usually has fluoride, abrasives, flavors, humectants, and detergents. So, what do all of these things do? Fluoride is a naturally occurring mineral. It can be…
What are the four laws of thermodynamics? I didn’t know there were four laws until researching this. Thermodynamics is the study of the relationship between heat, temperature, and energy. The…
Photo by Pixabay: https://www.pexels.com/photo/assorted-color-laser-lights-417458/ How does a laser work? By focusing light into a narrow beam. LASER is actually an acronym, and it stands for Light Amplification by Stimulated Emission…
Why are rubies red, emeralds green, and sapphires blue? Rubies and sapphires are varieties of the mineral corundum. Emeralds are a variety of the mineral beryl. They all have impurities…
Who was Molotov and why was the Molotov cocktail named after him? He was Vyacheslav Molotov, Minister of Foreign Affairs in the Soviet Union A Molotov cocktail is usually a…
How does a Geiger counter work? By using radiation to create an electrical signal. There are four types of radiation and they all have different mass and energy. The types…
Why do fish have scales? For protection, for camouflage, and to help them swim faster. There are four basic types of fish scale, but there are many subdivisions within each…