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Holt:Chapt. 11, Test
Energy; Renewable and Non Renewable
Question | Answer |
---|---|
Describe non renewable resources. | Limited supply and the item cannot be naturally replaced in a human life time. |
Discuss renewable resources. | Resources such as water, air & plants that can be replaced within a human life time. |
Describe metals. | Minerals with shiny surfaces, excellent conductors of heat and electricity, and easily bent when in thin sheets. |
Tell why ores are desirable. | Deposits of minerals that may be removed from the ground profitably. |
Define veins. | Narrow fingerlike bands of ore spread through rock cracks in hot mineral solutions. |
Explain the term, lode. | A large number of thick veins in close proximity below the surface. |
Describe placer deposits. | Concentrations of ore at the bottom of stream beds due to the high density of metals such as gold and silver. |
Define gemstones: | Rare mineral crystals that display brilliance and clarity and as such are selected for jewelry. |
Discuss conservation. | The mindful act of preserving valuable resources for our posterity and future generations through recycling and the like. |
Explain fossil fuels. | Compounds of hydrocarbons which contain abundant energy per unit of mass or volume; including coal and petroleum. |
Permeable rock possesses what characteristic? | Water can flow through it. |
Define crude oil. | Unrefined petroleum. |
Name the single most popular use of the fossil fuel, coal. | Energy source in the production of electricity. |
Where does acid rain come from? | The main source is burning coal which contains sulfur that combines with water to form dilute sulfuric acid which comes back to Earth's surface via rain. |
Define nuclear fission. | The splitting of the nucleus of a large atom into two or more smaller nuclei. |
Explain nuclear fusion. | Nuclei of two small atoms combine to form a single larger nuclei plus energy. |
Solar energy is desirable, why? | The energy from the sun is free and abundant and pollution free. |
Discuss geothermal energy. | The tapping of heat from Earth's interior. |
Describe hydroelectric power. | The use of energy contained within falling water, such as a waterfall or a dam, to spin turbines and generate electricity. |