Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
chpt 18 science:)
| Term | Definition |
|---|---|
| Conservation | Is the protection and careful management of our natural resources |
| How are humans endangering nature? | 1) Much of our wildlife is killed when we clear land 2) Insecticides used to kill pests on crops can also kill useful insects 3) Over fishing means that fisher men catch all fish young and old and the fish then cant breed |
| What can humans do to help? | -the government need to consider the environment before planning to build new roads or development -Zoos are encouraged to join breeding programmes - Join local conservation groups and join conservation activities like cleaning up local habitats |
| - Annual garden and bird watch surveys to keep track of the bird population -Obey the country code | |
| Pollution | Is the addition of harmful substances to the environment |
| Three types of pollution | 1)Air 2)water 3)Soil |
| Summary of air pollution: Smoke and dust | irritates the lining of the bronchi |
| Sulphur dioxide | Prevent plants from photosynthesising. If mixed with rain causes acid rain that kills plants and wears away old buildings |
| carbon monoxide and lead | poisons humans |
| CFCs | Reduces the ozone layer and the UV light that gets in causes cancer |
| Summary of water pollution: excess of fertiliser and slurry | Less oxygen, causing fish to die |
| Untreated sewage | Decomposers use up the oxygen, causing fish to die |
| oil | poisonous to birds and fish. coats feathers preventing flight. unsightly to beaches |
| litter | unsightly and can be a health hazard |
| Soil pollution | when pesticides and excess of fertilisers get in to the soil. Chemicals from factories and dumps can cause soil pollution |
| waste management | Is the way we deal with our waste |
| How to deal with waste | 1) Burned with an incinerator 2) put into landfill sites 3)recycled |
| 1) landfill sites | is a huge hole in the ground where waste is compressed and the buried into the ground |
| Advantages | - the methane that is produced by the rotting waste can be used as fuel - it is convenient |
| Disadvantages | -badly managed sites can be unsightly and smell and attract rats -poisonous chemicals can seep into the ground and effect water supplies -we are running out of space for these dumps |
| Incineration Advantages | - it can take huge volumes - its clean and efficient - it doesn't use up much land space |
| disadvantages | - it produces poisonous fumes - it also produces huge quantities of ash that has to be removed |
| recycling | reduce: reduce the amount of waste produced in the first place reuse: use again for a different purpose recycle: recover for reuse |
| Advantages | - environmentally friendly - it also saves money and energy |
| disadvantages | - some material brought to bring banks are not reusable and have to be put into landfill sites either here or abroad |
| Positive human activities on the environment | - Protecting the habitats and environments of plants and animals - implementing inti-pollution and waste management laws to reduce the effects that pollution and waste have on the planet |
| Negative human activities on the environment | - destroying habitats - releasing fossil fuels that contributes to global warming |
Created by:
kathy kearns
Popular Biology sets