13032458
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 do the arrows represent in a food chain and food web? | The arrows show the transfer of useful energy |
| What is a herbivore? | An organism that only eats plants |
| What is a carnivore? | An organism that only eats meat |
| What is an omnivore? | An organism that eats both meat and plants |
| What type of pyramid is shown in the diagram? | Pyramid of biomass |
| What type of pyramid is shown in the diagram? | Pyramid of number |
| What is a producer? | A plant, it is always the start of a food chain/food web |
| What is a primary consumer? | The organism that eats the producer |
| What is a secondary consumer? | The organism that eats the primary consumer |
| What is a tertiary consumer? | The organism that eats the secondary consumer |
| What is meant by the term interspecific? | Competition between different species |
| What is meant by the term intraspecific? | Competition between individuals of the same species |
| What do organisms compete for? | Food, shelter, water, mate |
| What is the source of all energy in food chains? | Light radiation from the sun |
| Why do plants need to capture light energy? | To carry out photosynthesis to produce glucose |
| Why is energy lost at each stage in the food chain? | Not all of the organism is eaten )the bones, roots etc) Waste materials from organisms (faeces) Energy lost as heat during respiration |
| Using the diagram, describe how carbon moves through the carbon cycle | Micro-organisms digest materials from their environment for growth and other life processes. These materials are returned to the environment either in waste products or when living things die and decay. When decay is prevented, fossil fuels such as coal, oil and gas are formed and these store energy in carbon compounds. Carbon is taken up by green plants in photosynthesis and is passed to animals when they eat the plants. Some of this carbon then becomes part of carbohydrates, fats and proteins which make up their bodies. Animals and plants release carbon dioxide during respiration. |
| What does carbon dioxide in the atmosphere lead to? | The greenhouse effect |
| Why is the greenhouse effect important? | The greenhouse effect stabilises conditions for life - ensures it is warm enough for life to survive and for the presence of water |
| How does human activity increase the levels of carbon dioxide? | Burning of fossil fuels Clearing of forests (deforestation) Intensive farming |
| Why is the increase in carbon dioxide levels worrying? | This will lead to global warming - melting of polar ice caps, flooding, droughts etc. |
| What are the proposed solutions to increasing levels of carbon dioxide? | Reducing dependency on fossil fuels Using alternative fuels Renewable sources of energy |
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