The Handy Geology Answer Book (The Handy Answer Book Series)
Language: English
Pages: 512
ISBN: 1578591562
Format: PDF / Kindle (mobi) / ePub
Radio-Controlled Car Experiments (Cool Science Projects with Technology)
Robotics: A Very Short Introduction (Very Short Introductions)
The Borderlands of Science: Where Sense Meets Nonsense
Ultrasociety: How 10,000 Years of War Made Humans the Greatest Cooperators on Earth
soil additives. What is salt? 100 Salt (NaCI, sodium chloride, or halite) is a necessity to most living organisms on Earth. Humans and other animals need salt to live, and thus have always valued salt licks, springs, and marshes to satisfy the natural craving for salt. For humans through the centuries, it has been used to preserve meats, especially in hot climates. Pure halite is clear and colorless, though it is often tinged by impurities. The mineral is soft, and crystals are cubic in
money, a horse, and a saddle.) The original stone was cut into ten pieces; those pieces were in The Hope Diamond, probably the ",wId's most famous diamond, is turn cut into 21 gems weigha 45.52·carat blue diamond with an unusual history. It was discovered in India over 350 years ago and was sold to King Louis ing 1 to 70 carats. The third XIV of France in 1668. In Louis' hands the stone was called the largest rough diamond ever French Blue and remained among the French crown jewels for found was
called a salt-and-pepper appearance. The minerals are mostly plagioclase feldspar and hornblende; biotite and quartz may also be present. It is often found in dikes (dykes). Andesite-Andesite is also related to granite and is named after the Andes Mountains in South America, where it was first studied. It has the same minerals as granite, but contains less silica and no quartz. Pumice-Pumice forms when lava cools too fast to allow gases to escape, creating a rock filled with holes. If the rock
mineral. It most often forms on the bottom of the ocean. Seat earth is a very pale, granular sandstone containing root fragments. Most are found in former sandbank areas in which vegetation once grew, and are often found with a bed of coal capping the rock. Graywacke is a coarse, unsorted sandstone with angular 125 How is limestone used? L imestone is used for a variety of purposes, especially in the construction industry. In particular, many limestones contain light fossils in a dark
shale-eternal fires that were (and have been) worshipped for centuries. He also brought back knowledge of coal to Italy from China, referring to it as the "stone that could burn." It was an item never used before in Europe. However, the origin for his reference to coal is questioned, as some historians doubt Polo actually made it to China. Natural gas-Records of natural gas appear as early as 3000 [I.C.E. (some historians say 6000 11.0:.), as ancient people worshipped "eternal fires" that most