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The northeastern United States — the New England states of Connecticut, Rhode Island, Massachusetts, New Hampshire, Vermont, Maine and New York — is home to striking natural beauty. Composing it are massive, bald-topped mountains, lush lowland forests, rocky storm-wracked coasts…
Many chemistry instructors teach beginning chemistry students the fundamentals of atomic structure by having them draw atoms based on the Bohr model of the atom. The Bohr model essentially treats atoms as miniature solar systems in which the small electrons…
Also known as saltpeter, potassium nitrate is a white crystallized compound composed of potassium, nitrogen and oxygen. Most commonly used in fireworks, matches and fertilizer, its medical applications include diuretics to reduce high blood pressure. Although typically produced synthetically, mining…
Whether it’s a wet tall-grass prairie in the American Midwest or a tropical savanna of widely spaced trees, grassland ecosystems come in many forms but are everywhere dominated by grasses and forbs instead of woody vegetation. Climate — and the…
Mechanical engineering, one of the oldest engineering fields, focuses on the application of physics and mathematics to the design and manufacturing of mechanical systems and products. This area of engineering is highly focused on the design and production of tools…
Basalt, a volcanic igneous rock, occurs worldwide, but especially in India, Scotland, Greenland, Iceland, Canada and the northwestern United States. Most basalt occurs as lava flows, in narrow dykes or sills. It’s the basalt from lava flows that make up…
What shape has a hexagonal top, a pentagonal bottom, and a triangle on its side? If you said a scutoid, we’d…well, we’d be pretty surprised. But you’re right! This week, a group of scientists from Spain, London and the U.S.…
Regions with semi-arid climates represent the second driest climates in the world after deserts, known for their dry, arid climates. Semi-arid climates typically receive up to twice the amount of rain than desert regions do — up to 20 inches…
Two types of alligators inhabit widely separated corners of the world: the American alligator of the southeastern United States and the Chinese alligator of eastern China. (The word alligator comes from the Spanish el lagarto, “the lizard,” a name applied…
Your TI-84 Plus Silver Edition calculator is capable of far more than “just” drawing graphs and performing complex calculations. One of its bigger strengths is the fact that it can be programmed to perform custom operations, including logic and relational…
