Monthly Archives: May, 2010

What is archaeology?

Archaeology is the study of ancient buildings, tools and other man-made objects as a way of learning how people lived long ago. Archaeology is the scientific study of the remains of past civilizations, or ways of life.  “Archaeology” comes from two Greek words that have the meanings “old” and “study”. The earliest civilizations did not …

Rate this:

Continue reading

How does a seismograph measure earthquakes?

By means of a delicately hung weight on a fixed base, a seismograph traces a chart which records how powerful an earthquake is. When an earthquake occurs, the violent movement of the earth’s crust causes vibrations that spread out in all direction though the earth. To help detect and measure earthquakes, scientists have invented an …

Rate this:

Continue reading

Why does silver tarnished?

Silver is a shiny, white metal.  But unless polished on occasion, objects made of silver may soon lose their brightness and become coated with a dull film. When silver turns dark, we say it is tarnished.  Silver tarnishes for almost the same reason that iron gets rusty.  In fact, the word “tarnish” is used for …

Rate this:

Continue reading