Science

Refine Search

What are some examples of external stimuli?

External stimuli can affect a person's decision-making abilities and choices. For example, when a person is hungry and sees a slice of pizza, internal stimuli from within the body, such as a stomach growl, salivating and hunger pain, indicates the need for food; the external factor, the pizza slice that a person is viewing through sight, serves as the external stimuli.\nOther examples of external stimuli include television and commercial ads, a window display at a clothing store, or a recommendation of a product. These examples all invoke one or more of the five senses.\nExternal stimuli ..

Continue Reading

What does a plateau look like?

Different types of plateaus such as a mesa or butte have varying degrees of flatness. The world's largest plateau is the Tibetan Plateau and is referred to as the roof of the world because it is over 3 miles above sea level. The second-largest plateau in the world is in northern Pakistan. In the spring it is covered with flowers and a wide array of butterflies. Antarctica is home to the third-largest plateau in the world, and it is covered with a giant icecap.\nPlateaus such as the Tibetan Plateau form when tectonic plates collide. More commonly, plateaus form when magma pushes towards th..

Continue Reading

Where can you find interesting facts about space for a classroom?

NASA's site has a large amount of information for teachers to use. These include access to facts about specific space missions and the science behind them, discovery units on mars, astronauts, the technology that is used in space and overviews of current space programs.The resources are for all grade levels from grade schoolto college level lessons. They include movies, games, interactive activities, facts about the planets, rocket history, solar and lunar eclipses and weather in space. They also cover NASA specific programs like the International Space Station, the Hubble Space Telescope..

Continue Reading

What are examples of mineral salts?

Some of these mineral salts are also found in vegetables, fresh fruits, milk, whole grains, legumes, meats, poultry, nuts, eggs and sea food. Table salt is the most commonly used mineral salt. It is mainly composed of sodium chloride and is essential for both humans and animals.\nMinerals salts are essential for the human body, as they help the body to function properly. They contain micro elements such as iodine, zinc, fluoride and iron. These are the essential nutrients needed in the human body. Without these essential mineral salts, health problems such as fatigue, anemia, anxiety, goiter, ..

Continue Reading

What is a compound microscope used for?

While common light microscopes contain one lens that magnifies the microscopic object or organism up to around 25 times, a compound microscope uses two lenses. Light passes through the microscopic object or organism to project the image in the first lens, referred to as the objective lens. This magnified primary image is then magnified further as it passes through the second lens, known as the ocular lens. The magnification of the microscopic object or organism varies. To determine the total magnification, the magnification of the objective lens is multiplied by the magnification of the ocular..

Continue Reading

What animals live in South America?

Armadillos, giant anteaters and sloths are found in South America. Among the birds that live in South America are the toucan, the Magellanic woodpecker, some species of penguin and the Andean condor. South American fish include the piranha and the characid.\nSeveral species of shark swim off the coasts of South America, including the whale shark, which is the largest fish in the world. Other sharks are the lemon shark, the tiger shark and the great white shark.\nSouth American arachnids include the Goliath bird-eating spider, scorpions and crab spiders. Insects include army and leaf-cutter ant..

Continue Reading

What is the weight of wood?

A lack of standardized wood weighing parameters prevents a comprehensive collection of wood weights. A weighing, however, of many types of wood at a moisture content of 12 percent and size of one cubic foot results in a valid comparison between wood weights. With this method, red oak is found to weigh 45 pounds per cubic foot, and western red cedar weighs 22.5 pounds per cubic foot. Thus, western red cedar, at a moisture content of 12 percent, weighs half as much as red oak.

Continue Reading

What is 40 pounds in kilograms?

A kilogram is a unit of measurement for weight or mass. It is 1,000 grams. A kilogram was originally defined as the mass of 1 liter of water at 32 degrees Fahrenheit. In 1889, a platinum-iridium alloy block was manufactured to be used as the official prototype for the weight of a kilogram. The prototype is kept at the International Bureau of Weights and Measures located in France. Until 1799, the unit of 1,000 grams was called a grave.

Continue Reading

What types of cells undergo fermentation?

During lactic acid fermentation, glucose separates into lactic acid and adenosine triphosphate, or ATP. In alcoholic fermentation, it separates into ATP, ethyl alcohol and carbon dioxide molecules. When there is a lack of oxygen, living things trigger the fermentation process to release ATP energy to support cell functions. Food and beverage industries also use fermentation and its by-products to produce beer, wine, bread, sauerkraut and cheese. Other industries use it to treat sewage and produce hydrogen gas.

Continue Reading

Why are boogers green?

Despite the common misconception that green mucus signals an infection, the green tinge is not caused by the virus or bacterium itself. Viral infections tend to produce clear mucus in the nasal passages. The mucus turns green as the body starts to respond to the presence of the virus by sending white blood cells to fight it. Within one to three days of this response, nasal mucus typically thickens and becomes green or yellow.\nThe presence of green mucus does not mean that treatment, particularly with antibiotics, is needed. Viral infections do not respond to antibiotics. Furthermore, the pres..

Continue Reading
Showing 8201 to 8210 of 10000 (1000 Pages)