Explains some of the different ways in which time is measured by clocks, calendars, days, hours, minutes, seconds, months, seasons, and the rituals of morning, noon, afternoon, evening, and night.
While traveling to an important feast in ancient China, Chuan and his friend Jing Jing devise a water "alarm" clock to make sure their party reaches the emperor's palace before rival warlords. Includes a brief history of water clocks and instructions for making one.
Introduces the concept of weight, discussing units of weight, methods of measuring weight, and the importance of weight measurement for a variety of uses.
Contains an introduction to the concept of distance, in simple text with illustrations, and provides information on what it is, how it is measured, how it is perceieved on land and at sea.
The fundamentals of light in cluding how it is measured, its interaction with matter, and the particle and wave theories of lightare covered in this detailed volume.
An exploration of the science of light that discusses what early scientists believed about light, how light speed is measured, what theories exist about light, and other related topics.
the inside story of its role in the September 11th aftermath
Lioy, Paul J
2010
Paul J. Lioy, an American environmental scientist, discusses the dust that was released from the terrorist attacks on the World Trade Center in 2001, describing his scientific findings and the environmental impact of the dust, the government focus on asbestos, and suggestions to prepare for future incidents.
Offers a detailed analysis of how global warming is impacting the world and everyday life today, and warns of what will happen if steps are not taken now to stop the spread of global warming.
