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| Question | Answer |
| In a kite diagram, what is measured? | In a kite diagram, zonation is measured. |
| When techniques such as the capture and recapture method are used, what is assumed? | -there are no deaths, immigration or emigration -identical sampling methods are used each time so comparisons can be made -marking animals does not affect their survival by damaging their bodies or affecting their camouflage |
| Why are population sizes always changing? | -animals are being born and others are dying -there is movement of animals in and out of an ecosystem |
| What formula is used to estimate a population size? | population size= number in 1st sample x 2nd sample/ number in 2nd sample previously marked |
| What do scientists use the 'capture and recapture' method for? | Estimating the population of a species. |
| What is the name of the method which scientists use to estimate the population of a species? | The 'capture and recapture' method. |
| What are plants and animals dependent on each other for? | Supplies of oxygen and carbon dioxide. |
| What are all ecosystems dependent on? | All ecosystems are self supporting, apart from an energy source which is usually the Sun. |
| What do animals depend on plants for? | All animals directly or indirectly depend on plants for food. |
| What do plants depend on animals for? | Pollination and seed dispersal. |
| What is a community? | A community is lots of different species living together in the same ecosystem. |
| What is an artificial ecosystem? | Artificial ecosystems have been made by humans, often using plants and animals from other countries. They will have a very small biodiversity. |
| What are three examples of a natural ecosystem? | Native woodland, lakes and oceans. |
| What does a natural ecosystem contain? | Natural ecosystems contain plants that have grown there naturally and not been introduced by humans. |
| What is a habitat? | A habitat is where an organism lives. |
| What is an ecosystem? | An ecosystem is made up of several habitats. It is all living things and their surroundings in an area. |
| Living organisms are found where conditions are best for them. What affects their distribution? | Their distribution is affected by: -the presence of other living organisms such as predators or herbivores, which eat them -physical factors such as soil type and water availability. |
| What is biodiversity? | Biodiversity is the range of different living organisms in a habitat. |
| What is a population? | A population is a group of animals or plants of the same species. |
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