The Physical Sciences
Physics: The study of matter and energy and the interactions between them. Physicists study such subjects as gravity, light, and time. Albert Einstein, a famous physicist,…
bit: The word "bit" is short for "binary digit." A bit is the smallest piece of computer information. byte: Most computers use combinations of eight bits, called bytes, to represent one…
Did you ever wonder what those funny endings are in Internet addresses-like "dot com"? They're part of the domain. The domain is the name of a network or computer that is linked to the Internet.…
In email, text messages, online chat rooms, and tweets, people often try to type as fast as they can. Using acronyms or abbreviations helps them keep up their speed. Here's a quick taste of the…
At the beginning of the 20th century, an uninterrupted system of nationwide highways did not exist. Beginning in 1811, a National Road had been constructed between Cumberland in western Maryland…
Facts and Figures About Twisters Although tornadoes can happen at any time of year, they are especially common during the spring and early summer. May and June are the peak months in terms of…
The Fog at the Beginning of the Universe A team of astronomers from the California Institute of Technology, led by S. George Djorgovski, may have glimpsed the dawn of our universe. In Aug. 2001,…
The computer age began when ENIAC (Electronic Numerical Integrator and Calculator) was completed in 1945. The first multipurpose computer, ENIAC set speed records with an amazing 5,000 additions…
Rocks are classified in three types based on how they are formed.Igneous rocks are formed when molten rock (magma) from within Earth cools and solidifies. There are two types: intrusive igneous…
There are many reasons not to smoke. Smoking stinks—literally! It makes breath, hair and clothes smell like smoke. It's expensive. It dulls your sense of taste and smell. It raises blood pressure…
