Knowledge
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What is the repeating cycle of precipitation, condensation and evaporation called?
Water Cycle. The water cycle is also called the hydrologic cycle.
What is the final stage of ecological succession called?
Climax. Climate changes can occur over long or short time periods.
Which planet has the most eccentric orbit?
Pluto. Pluto's orbit is so eccentric that it periodically passes inside the orbit of Neptune.
What is the main structural molecule in hair and nails?
Keratin. A rhinoceros's horn is made of keratin.
What are minerals found in high quantities and worth mining called?
Ores. Ores are rocks that contain important elements, particularly metals.
A kind of protective covering for the body is a called what?
Armor. Modern law enforcement and military personnel wear body armor made of DuPont's Kevlar.
What phenomenon is responsible for the radiation produced by black holes?
Pair Production Quantum Fluctuations. Quantum mechanics predicts that black holes emit radiation.
What is a more scientific term for "surrounding temperature"?
Ambient Air Temperature. On a typical day on Mercury the early-afternoon temperature reaches a high of 800 degrees Fahrenheit, hot enough to melt zinc and tin.
Which of the following items is a tool used to tell time by the sun's movement in the sky?
Sundial. The sundial is the most ancient of scientific instruments.
What instrument do scientists often use to measure the amount of force?
Spring Scale. A spring scale works by Hooke's Law.
Coral reefs are largely in what ocean zone?
Neritic Zone. The neritic zone is also called the "coastal waters".
What group of animals has hollow bodies and stinging cells?
Cnidarians. The group called Cnidarians includes jellyfish, coral and hydra.
What is an electronic circuit that aligns unsynchronized video signals before signal processing?
Timebase Corrector. Time base correction is used to reduce or eliminate mechanical errors in analog recordings.
Which of these is the best way scientists can learn about life in the past?
Fossil Record. The earth's fossil record provides information about evolution.
An examination of the chest and its contents by X-ray is commonly known as what?
Chest X-Ray. The X-ray was invented by accident in 1895.
What is the transport of top layers of soil to another place called?
Soil Erosion. Extensive soil erosion resulted in the "Dust Bowl" of the 1930s.
What is the wearing away of parts of the Earth by water or wind called?
Erosion. The Grand Canyon was made by erosion.
The term "falls" is best defined as what?
Very Fast Whitewater Cascade. Niagara Falls comprises the American and Bridal Veils Falls on the American side and the Canadian-Horseshoe Falls on the Canadian side.
What do you count on a tree to tell how old it is?
Rings. One annual tree ring is composed of a ring of early wood and a ring of late wood.
What do car makers use to test air resistance in new car models?
Wind Tunnel. A wind tunnel is used in aerodynamic research to study how air moves over an object.
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