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43 Cards in this Set
- Front
- Back
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What are natural resources? |
Resources that come from nature. |
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What are fossil fuels? |
Fuels that contain carbon, deposited in Earth in the form of ancient plants or animals. |
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Define recycling. |
Processing waste material so that is can be used again. |
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Name the two kinds of natural resources. |
•renewable •non renewable |
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What is renewable resources? |
Will not run out if people use them wisely. |
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What are non-renewable? |
Resources that have a limited supply. |
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What two things that can happen when people use resources unwisely? |
•resources are damaged •resources are used up quickly |
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What is over fishing? |
Taking more fish than nature can replace. |
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What are fish stocks? |
The available supply of fish. |
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What are the causes of overfishing? |
•Modern fishing methods •the population of the world had doubled •lack of international laws |
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What are the effects of overfishing? |
•reduces the amount of food available for people to eat. •affects many other plants and animals in the sea •reduction in fish supply |
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Define desertification. |
Processes (caused by human activities and climate changes) that reduce the quality of land in dry areas. |
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Define degraded. |
Worn down, in a bad condition. |
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What are the effects of overgrazing? |
•plants don't have enough time to grow before they are grazed. •bare patched of soil appear. •soil is eroded by wind and water. |
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Define sustainable. |
Able to be used at the same rate for a long time without threatening the supply. |
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Define unsustainable. |
Cannot be used at the present rate without being lost or damaged. |
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Define insulation. |
Preventing heating from passing through. |
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Define quota. |
A maximum quantity that is allowed. |
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Define habitats. |
Places where a specific plant or animal normally lives. |
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What is size restrictions? |
Limits on catching fish or lobster which is too small to breed. |
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What is the aim of the marine protected areas? |
•provide a safe place for fish stocks to breed and grow. •protect important habitats from damage by human activities •increase the size of fish catches in surrounding areas |
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Define trawling. |
Dragging a large net behind a fishing boat. |
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What does SASSI stand for? |
Southern African Sustainable Seafood Initiative |
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What is fodder? |
Food for animals. |
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What is silage? |
Animal fodder made from storing plants in a large tank called a silo. |
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Define holistic. |
To do with the whole system, not just one part. |
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What is herbivores? |
Animals that eat grass and other plants. |
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What is rotational grazing? |
Limits the time animals spend on one piece of land. |
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What is strip grazing? |
It makes sure animals feed on all the grass species in the strip. Fences restrict animals to one part of a field. |
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Define eco-friendly. |
Doing little or no harm to the environment |
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What is carbon footprint? |
The amount of carbon we create by using fuels that release carbon dioxide. |
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Define undernourished. |
Not having enough nutrients for good health. |
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What is adequate food? |
Having sufficient quantity to live healthy. |
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What are commercial farms? |
Grow crops or raise animals for sale. |
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Define livestock. |
Animals raised for food on farms. |
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Define mechanization. |
To replace work done by people with work done by machines. |
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What is mass production? |
Producing things in large quantities |
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Define hormone. |
Chemical that affects the way plants and animals develop and grow. |
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What is genetic modification? |
A scientific method that changes the way plants and animals develop and grow. |
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Define pesticides. |
Chemicals used to control pests especially insects. |
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Define herbicides. |
Chemicals designed to kill weed and other unwanted plants. |
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Define appropriate technology. |
Simple, inexpensive technology that does not replace people. |
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Define ecosystem. |
The relationships between all the living things in a particular environment. |
