Biosphere 2.0 / 5 based on 1 rating ? BiologyNational 5SQA Created by: Lisa DuncanCreated on: 03-10-12 22:47 What are the three main parts of an ecosystem? Habitat, Population, Community and Ecosystem 1 of 33 Name a method of sampling plants Quadrat 2 of 33 Errors using a quadrat Quadrat can be placed on interesting piece of ground- biased results. 3 of 33 Name a method of sampling invertebrates Pitfall Trap 4 of 33 Errors using a pitfall trap Invertebrates could be eaten 5 of 33 What is an abiotic factor? A non-living aspect of the environment which has an affect on organisms 6 of 33 Give three abiotic factors Any of: light intenstity, temperature, pH, soil moisture 7 of 33 How do you measure light intensity and soil moisture? Using a light meter and moisture meter. 8 of 33 Precautions when using a light meter Do not lean over the light meter otherwise light will be obstructed. Carry out measuremets at the same time of day. 9 of 33 Precautions when using a moisture meter Push the probe in the ground the same depth and wipe the probe with a tissue after a measurement is taken. 10 of 33 What is habitat? A place where an organism lives 11 of 33 What is a population? All the members of a particular species living in an ecosystem 12 of 33 Green plants make food via photosynthesis, what are they? Producers 13 of 33 Organisms that only eat plants are? Herbivores 14 of 33 Organisms that only eat other organisms are? Carnivores 15 of 33 Organisms that eat both plants and other organisms are? Omnivores 16 of 33 What is the name for a more complex food chain? Food web 17 of 33 What do the arrows in a food chain indicate? Energy flow 18 of 33 Name three ways energy can be lost from a food chain Heat, movement and faeces 19 of 33 How much energy is passed on in a food chain? 10% 20 of 33 What does a pyramid of numbers show? The change in numbers in a food chain. 21 of 33 What does a pyramid of biomass show? The change in mass in a food chain. 22 of 33 What are main factors which limit population growth? Lack of food, lack of space, disease and predators 23 of 33 Why does competition occur? Because organisms need the same resources 24 of 33 Name four things organisms compete for. Food, water, space and light (in the case of plants) 25 of 33 Where are nitrogen fixing bacteria found? In nodules of the roots of leguminous plants. 26 of 33 Describe the nitrogen cycle Refer to bible. 27 of 33 What pollutes the sea? Oil, sewage, fertilizers, pesticides and other chemicals. 28 of 33 What are the three main sources of pollution? Domestic, agriculture and industry. 29 of 33 What happens when soot covers the leaves of plants? Less photosynthesis 30 of 33 State two ways pollution can be controlled Filters on chimneys, treating sewage. 31 of 33 What is an indicator species? Organisms who's presence or absence tells us something about the state of the environment. 32 of 33 State a way we can improve crop fertility. Crop rotation 33 of 33
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