13044397
Description
Flashcards by Mrs Z Rourke, updated more than 1 year ago
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Created by Mrs Z Rourke
over 6 years ago
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| Question | Answer |
| What is bioaccumulation? | Heavy metals, present in industrial waste and pesticides, enter the food chain, accumulate in animal bodies and may reach a toxic level |
| What is eutrophication? | 1. Untreated sewage and fertilisers may run into water and cause rapid growth of plants and algae. 2. These then die and are decomposed; the microbes, which break them down, increase in number and use up the dissolved oxygen in the water. 3. Animals which live in the water may suffocate |
| What is a disadvantage of plastic? | Plastics are non-biodegradable and so there is an increase pressure on landfill |
| What is a habitat? | A habitat is a place where an organism or a community of organisms live. |
| Why are habitats being destroyed? | Destruction of habitat due to increased land use for building, quarrying, dumping and agriculture |
| Why is destroying habitats a problem? | Causes loss of species and a reduction in biodiversity |
| What measures are in place to ensure sustainability? | Reduce, reuse, recycle schemes or the use of biodegradable materials in packaging |
| Why is the disposal of waste in landfill sites a problem? | Non-degradable products use productive land in landfill, and partial breakdown produces toxic materials that may leak into the environment. |
| What is the difference between living and non-living indicators? | Living indicators will only grown in certain conditions and so you can tell the quality of water/air from the type of species living there e.g. lichens. Non-living indicators is the use of technology to test pH level and oxygen levels in streams. |
| How can biodiversity and endangered species be conserved? | • Convention on International Trade in Endangered Species • Sites of Special Scientific Interest • captive breeding programmes • national parks • seed/ sperm banks |
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