What is a psychrometer and what is it for?
A thermometer attached to a window frame is usually sufficient for the average person to determine the weather...
Who invented the wheel and where did it happen?
It is hard to say what path human civilization would have taken if people had not invented the...
What is tin and what does it do?
Tin, a soft white metal, was one of the first metals that humans learned to work with. Scientists...
What is bronze and what is it made of?
Bronze is an alloy of copper with other metals, less commonly nonmetals. The most common name for bronze...
What is nitrogen and what is it used for?
Nitrogen is a chemical element with atomic number 7. It is an odorless, tasteless, and colorless gas. Therefore,...
What is sand, and what is its chemical composition?
Natural sand is a loose sedimentary rock that has formed over millions of years through weathering. Wind, rain,...
What is lead and where is it used?
Lead (Latin for plumbum) is a chemical element, a metal with atomic number 82. In its pure form,...
Why is the milk white? Where does that color come from?
Milk is one of the most nutritious and valuable products, and not only cow’s milk but also goat’s,...
Food for pleasure: foods that lift your spirits
Tasty and healthy food can be a great remedy for both body and mind. Here is a list...
Harmful and beneficial properties of chicken eggs
Fried or boiled eggs are one of the most favorite dishes for breakfast or dinner, and they are...