What is the energy transfer for hydroelectric power? Hydropower plants capture the energy of falling water to generate electricity. A turbine converts the kinetic energy of falling water into mechanical energy. Then a generator converts the mechanical energy from the turbine into electrical energy. How is electricity generated at a hydroelectric dam? Hydroelectric power is […]

How do you explain air pressure? The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. […]

How are Upwarped mountains formed? Upwarped mountains form when forces inside Earth push up the crust. With time, sedimentary rock lay- ers on top will erode, exposing the igneous or metamorphic rocks underneath. The igneous and metamorphic rocks can erode further to form sharp peaks and ridges. What are Upwarped mountains? Upwarped mountains are generally […]

Is capitalism a command economy? Capitalism is an economic system in which private individuals or businesses own capital goods. The production of goods and services is based on supply and demand in the general market—known as a market economy—rather than through central planning—known as a planned economy or command economy. What is command capitalism? As […]

Why are tariffs and trade barriers used in international trade? Both tariffs and subsidies raise the price of foreign goods relative to domestic goods, which reduces imports. Barriers to trade are often called “protection” because their stated purpose is to shield or advance particular industries or segments of an economy. How do tariffs restrict international […]

How do hydroelectric dams help Brazil? In the first group the most relevant are: energy production, employment generation, enhancement of water quality in the transformation from lotic to lentic ecosystems (turbidity reduction, higher water transparency, nutrients sedimentation and decreasing of eutrophication processes downstream), expansion of working … Why is hydropower the most used? Hydropower is […]

Where was the first road built in America? The National Road (also known as the Cumberland Road) was the first major improved highway in the United States built by the federal government. Built between 1811 and 1837, the 620-mile (1,000 km) road connected the Potomac and Ohio Rivers and was a main transport path to […]

How does global warming affect climate change? There are three major ways in which global warming will make changes to regional climate: melting or forming ice, changing the hydrological cycle (of evaporation and precipitation) and changing currents in the oceans and air flows in the atmosphere. What is an example of climate change from global […]

Where did the Neolithic revolution first occur? Mesopotamia When did the transition from food foraging to food production begin? about 10,000 years ago How did the origins of food production most likely occur? Why did food production originate? The reliance on a variety of relatively stationary food resources, such as fish, shellfish, small game, and […]

Is Tonga an archipelago? Located in Oceania, Tonga is a small archipelago in the South Pacific Ocean, directly south of Samoa and about two-thirds of the way from Hawaii to New Zealand. Is Tonga a volcanic island? Lateiki Island, also known as Metis Shoal, is just the tip of a large undersea volcano (seamount) in […]