... It is a term that was coined in 1872 by Dr. Robert Angus Smith, an English chemist. (Mello 21). He noticed that the air in the cities contained many different contaminates including sulfuric acid, which he believed to be the cause of corroding metals and certain types of damage to ... the red spruces were dying in the virgin forests on Camel's Hump. This prompted extensive research into why this might be happening. Red Spruce live at high elevations and are capable of surviving in thin, rocky soil with an already high acidity. At the elevation in which they live there is ... Grant 5 ot...

• Word Count: 1306
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

... butterfly expands it wings and has to sit and let them dry. Stages v/s Egg Larva Pupa Adult Types of butterflies Scientist group thousands of species of butterflies into families, according to various physical features the insects have in common. The chief family includes (1) skipper; (2) blue, coppers, and hairstreaks; (3) brush-footed ... covering on the head of the proboscis closes and keeps fluids from flowing out. Other muscles force the fluids into the stomach. The thorax v/s forms the middle section of the butterfly's body. A short, thin neck connects it to the insect's head. Att...

• Word Count: 594
• Approx Pages: 2
• Grade Level: High School

... FLOOR SPREADING AND SUBDUCTION My model is of sea floor spreading and subduction, with minor folds, erosion and sedimentation. The lithosphere, the outer hard shell of the Earth, is broken into a dozen or so major pieces, called plates, and these plates are moving with respect to one another. At one time North America, South America, Europe, and Africa were joined together ... apart, the rocks break and form a crack between the plates. Earthquakes occur along the plate boundary. Magma rises through the cracks and seeps out onto the ocean floor like a long, thin, undersea volcano. When N...

• Word Count: 490
• Approx Pages: 2
• Grade Level: High School

... up on a condor you will notice white patches of feathers. The condor is a master of flight, reaching speeds of 35-55 miles per hour. It takes off by catching rising air currents called thermals. Straight feathers called primaries located at the wing tips help the bird position itself on the thermals. It lands by partly folding its wings and sticking out ... and hunters for their prized skins and eggs. In the 1940's a new enemy for the condor arose. That enemy was a pesticide called DDT which caused the eggshells to get so thin that when the parents sat on the egg it cracked. A poisoning...

• Word Count: 888
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School

... and materials that Wrigley Company would use in constructing the gum were sampled to ensure the quality of their finished product. The base materials were then grinded in squeaky clean, air-conditioned rooms that were carefully monitored. Then, the base of the gum had to be melted, purified, and mixed. After these initial four steps were completed, the mixture was ready ... to be rolled into long, thin ribbons. Before the cutting of the ribbon, a coating of powdered sugar was sprinkled onto both sides of the manufactured goods. Following the cutting, the individual pieces of gum had ......

• Word Count: 601
• Approx Pages: 2
• Grade Level: High School

... purchased Assateague Island and divided it: the Maryland end became Assateague National Seashore Park, the southern end Chincoteague National Wildlife Refuge. Today, the ponies are split into two main herds, one on the Virginia end and one on the Maryland end of Assateague. A fence at the Virginia/Maryland State line separates the herds ... characteristics of this athletic breed are large, expressive eyes. The mane is thick, and often wavy. The tail is usually thick, long and low set. Fine, thin ears of medium length. The Spanish-Norman displays a keen aptitude for learning, a strong wor...

• Word Count: 2405
• Approx Pages: 10
• Grade Level: High School