Flashcards
Year 10 - 1.6 Ecosystems, nutrient cycles and human impact on the environment
Flashcards do conjunto (19)
- 1What do the arrows represent in a food chain and food web?The arrows show the transfer of useful energy
- 2What is a herbivore?An organism that only eats plants
- 3What is a carnivore?An organism that only eats meat
- 4What is an omnivore?An organism that eats both meat and plants
- 5What type of pyramid is shown in the diagram?Pyramid of biomass
- 6What type of pyramid is shown in the diagram?Pyramid of number
- 7What is a producer?A plant, it is always the start of a food chain/food web
- 8What is a primary consumer?The organism that eats the producer
- 9What is a secondary consumer?The organism that eats the primary consumer
- 10What is a tertiary consumer?The organism that eats the secondary consumer
- 11What do organisms compete for?Food, shelter, water, mate
- 12What is the source of all energy in food chains?Light radiation from the sun
- 13Why do plants need to capture light energy?To carry out photosynthesis to produce glucose
- 14Why 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 - 15What is intensive farming?Intensive farming is a type of farming which produces as much food as possible by making full use of the land.
The aim is to maximize yields. - 16What factors need to be controlled in intensive farming?1. Temperature - animals will use less energy if their environment is warm
2. Restrict movement - the more animals move, the more energy is wasted
3. Food - use high protein diet to promote growth
4. Security - animals need to be kept safe from predators
5. Antibiotics - to prevent the spread of disease - 17What are the problems with using chemicals in intensive farming?Fertilisers can cause eutrophication
Pesticides can have unintended effects on insects such as bees
Overuse of antibiotics has led to antibiotic resistant bacteria - 18What is bioaccumulation?Heavy metals, present in industrial waste and pesticides, enter the food chain, accumulate in animal bodies and may reach a toxic level
- 19What 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
Informações
- Descrição
- GCSE Biology FlashCards sobre Year 10 - 1.6 Ecosystems, nutrient cycles and human impact on the environment, criado por Mrs Z Rourke em 29-03-2018.
- Criado por
- Mrs Z Rourke
- Visualizações
- 281
- Avaliação