30 Questions
What is a major drawback of building wind turbines?
They have high initial costs and long lead times in construction
What is the maximum efficiency of solar energy conversion?
33%
What is the primary purpose of a flat-plate collector in solar energy?
To absorb the sun's energy to heat water
What is the term for the conversion of light into electricity?
Photovoltaic
What is the primary component of a solar panel?
Silicon
What is the estimated global energy potential of solar energy?
23,000 TW
What percentage of 235U is required for nuclear fuel to be used in US reactors?
3-5%
What is the primary purpose of control rods in a nuclear reactor?
To decrease the rate of chain reaction
Which country is home to the Three Gorges Dam, a major hydropower project?
China
What is the primary advantage of tidal power compared to solar and wind power?
More predictable energy generation
What is the term for the height difference between the source and the water's outflow in a hydropower plant?
Hydraulic head
What is the primary advantage of hydropower in terms of environmental impact?
Emissions-free operation
What is the primary mechanism by which methane hydrate forms?
Migration of gas followed by precipitation or crystallization on contact of rising gas stream with cold sea water
What is the main difference between bituminous coal and anthracite?
Carbon content
What is the purpose of a moderator in a nuclear reactor?
To slow down neutrons
What is the primary application of coke?
Fuel and reducing material for smelting iron ore
What is the purpose of control rods in a nuclear reactor?
To absorb excess neutrons
What percentage of uranium in yellow cake is 235U?
0.7%
What is the primary function of worms in ecosystems?
To break down dead organisms for energy and recycle nutrients
What is the term for a group of organisms that share most characteristics and can breed with one another?
Species
What determines the distribution of biomes on land?
Temperature and precipitation
What is the term for all organisms of a species that live in the same place at the same time?
Population
What is the term for areas sharing similar climate, topographic, and soil conditions?
Biome
What is the definition of a forest?
A land area with tree crown cover of more than 10%
What is a characteristic of silicon-based solar cells?
High manufacturing costs
What is the purpose of the mirrored surface in solar electric power plants?
To reflect sunlight to heat up liquid
What is a limitation of solar electric power plants?
They cannot generate electricity at night or on cloudy days
What is biofuel made from?
Biomass
What is the largest source of biomass?
Wood
What is the purpose of energy storage systems in solar electric power plants?
To provide continuous supply of electricity
Test your knowledge on methane hydrate, also known as fire ice, a crystalline solid formed by gas molecules trapped in water molecules. Learn about its formation, properties, and where it can be found.
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