Presentation on theme: "Organisms that make food (pro....) Organisms that hunts"— Presentation transcript:
1 Organisms that make food (pro....) Organisms that hunts ceRspredatosfochaincarnivoesc n s m e sOrganisms that make food (pro....)Organisms that huntse.g. lion, tigers, polar bears (pre.....)When organisms are linked up inone direction of taking food (f… c…)Organisms that eat organismsthat make food (carn....)Organisms that cannotmake its own food (con....)When organisms are linked up in manydirections of taking foodOrganisms that onlyeats producers (herb...)Organisms being huntede.g. dears, rabbits (pre.....)fodwebh e b i v r ep r e y
2 Boardworks GCSE Science: Biology Health and Diet Feeding off each other or notSaturday, 22 April 2017Boardworks GCSE Science: BiologyHealth and DietBehaviour Focus: take a step back and the view is wider – we only need work to be doneCopy and leave space to write answers/ responses to the learning objectivesThe Big Question: How do organisms feed themselves?L.O.1: What are the types of organisms in feeding?L.O.2: How are they related to each other?L.O.3: What is the importance of feeding off more than one source?
3 Boardworks KS3 Science 2008 Feeding Relationships Feeding typesBoardworks KS3 Science 2008Feeding RelationshipsDifferent types of organism can be grouped in several ways. One grouping system is based on how organisms obtain their food.Some organisms produce their own food. They are called producers.Plants produce their own food using light energy from the Sun. Some types of bacteria can also make their own food by using light or chemical reactions.Other organisms cannot make their own food. They are called consumers.
5 Boardworks KS3 Science 2008 Feeding Relationships ConsumersBoardworks KS3 Science 2008Feeding RelationshipsConsumers can be grouped into different types:Write one short sentence describing herbivoresThese consumers eat producers. Herbivores include some plants and types of bacteria.Write one short sentence describing carnivoresThese consumers eat other consumers.Write one short sentence describing omnivoresThese consumers eat other consumers and producers. Omnivores eat animals and plants. Most humans are omnivores.
6 Feeding types – Copy the key words and match the explanation Boardworks KS3 Science 2008Feeding Relationships
7 Food chains – who eats what? Boardworks KS3 Science 2008Feeding RelationshipsCan you see a food chain in this habitat?Feeding Relationship Worksheet1 accompanies this section.
8 Boardworks KS3 Science 2008 Feeding Relationships Food chainsBoardworks KS3 Science 2008Feeding RelationshipsA food chain is a sequence that shows how each individual feeds on the organism below it in the chain. Each arrow means ‘eaten by’.leafcaterpillarbirdfoxWhat does this food chain show?A leaf is eaten by a caterpillar, which is then eaten by a bird, which is then eaten by a fox.Energy is transferred from one organism to another in the direction of the arrow.
9 Predator-prey relationships Boardworks KS3 Science 2008Feeding RelationshipsAnimals that are high up in food chains, such as the fox, tend to be hunters that are skilled at locating and killing their food. These hunters are called predators.The animals on which the predator feeds are called their prey.Prey animals tend to be well adapted to avoid the predator.Photo credit: Jupiterimages CorporationCommon prey adaptations include camouflage or the ability to produce poisonous toxins.
10 Boardworks KS3 Science 2008 Feeding Relationships Name that feeding typeBoardworks KS3 Science 2008Feeding Relationships
11 Primary, secondary or tertiary? Boardworks KS3 Science 2008Feeding Relationships
12 What are pyramids of numbers? Boardworks KS3 Science 2008Feeding RelationshipsPyramids of numbers are a numerical way of representing food chains.They record the number of organisms at each level in the food chain.What are the problems of representing food chains in pyramids of numbers?Pyramids of numbers only give an accurate impression of the flow of energy in a food chain if the organisms are of similar size. Measuring the biomass (living material that makes up all organisms) at each level in the food chain can give a more accurate picture.
14 Boardworks KS3 Science 2008 Feeding Relationships Ranking consumersBoardworks KS3 Science 2008Feeding RelationshipsDraw the food chain and then complete the sentencesseaweedlimpetcrabhumanproducerprimaryconsumersecondaryconsumertertiaryconsumerProducers – make their own food.Primary consumers – eat producers.Secondary consumers – eat primary consumers.Tertiary consumers – eat secondary consumers.
15 Boardworks GCSE Science: Biology Health and Diet Waste and Disruption in the WebSaturday, 22 April 2017Boardworks GCSE Science: BiologyHealth and DietBehaviour Focus: FOCUS! You need nothing else if you are not there yet.Copy and leave space to write answers/ responses to the learning objectivesThe Big Question: What if the food web is disrupted?L.O.1: What are waste and disruptions to a food web?L.O.2: How would they affect the web?L.O.3: Why would we want to take care of our environment?
16 An Antarctic food chain Boardworks KS3 Science 2008Feeding Relationships
19 Boardworks KS3 Science 2008 Feeding Relationships Write the question and 3 bullet points answering the question: What if we change the numbers of the levels of organism in the food web?Boardworks KS3 Science 2008Feeding RelationshipsTeacher notesThis activity is designed to show students that a decline in one species can have a significant impact on others. These values and outcomes are completely speculative.
20 Boardworks KS3 Science 2008 Feeding Relationships Food for energyBoardworks KS3 Science 2008Feeding RelationshipsWhy do organisms need to feed?Most animals get their energy from food. If the producers at the bottom of the food chain are small organisms, then the consumers at the top of chain need to eat many of them to gain enough energy.Much of the energy that prey generate is lost on a daily basis through heat, growth and waste.Very little energy is actually transferred to the predator.
21 Food chains and pyramids Boardworks KS3 Science 2008Feeding RelationshipsWhat can a pyramid of numbers show about energy transfer?Teacher notesThis illustration contains several discussion points relating to food chains and pyramids, including:Oak tree containing caterpillars, shrews and an owl: This represents a food chain with an oak tree as the primary producer, caterpillars as primary consumers, shrews as secondary consumers and an owl as the tertiary consumer. The balancing act illustrates the dependence of organisms on a food supply. Although the amount of biomass decreases at each stage of the food chain, representing this chain as a pyramid of numbers would result in a pyramid with a base narrower than its middle, because this system is supported by one oak tree.Ring master balancing on cows: This represents a food chain with cereal crops as the primary producer, cows as the primary consumer and humans as the secondary consumer. Students could be asked to consider if it would be more energy efficient for the human to eat the cereal crops directly.Setting sun: The Sun provides energy for photosynthesis, the process used by plants to make food.Antelope and lions: The antelope are grazing on grass. They are being closely watched by a hungry-looking pride of lions. This represents a food chain with grass as the primary producer, antelope as the primary consumer and lions as the secondary consumer.
22 TRUE OR FALSE Write 1 to 8 and TRUE or FALSE for each statements below Consumers eats producers.Producers produce food.Number of organism is not a good representation (showing) how much energy there is in each level of the food pyramid.The lower levels of the pyramid can be smaller than the higher level in good ecosystems.Energy is wasted in each level so the higher levels are always smallerA lot of people on earth is helpful to the ecosystem.If the higher levels of the pyramid is getting too big, the animals in the lower levels can extinct.If the higher levels if the pyramid is getting too big, the animals in the higher levels can extinct.TRUETRUEFALSETRUEFALSETRUETRUE
23 Behaviour Focus: Do more than 100% as there is always energy lost. Energy Lost and BiomassSaturday, 22 April 2017Boardworks GCSE Science: BiologyHealth and DietBehaviour Focus: Do more than 100% as there is always energy lost.Copy and leave space to write answers/ responses to the learning objectivesThe Big Question: Why do we always have some waste?L.O.1: What is biomass?L.O.2: How is energy lost in each level of food chain?L.O.3: How can we keep energy lost less?
24 Boardworks KS3 Science 2008 Feeding Relationships Numbers or biomass?Boardworks KS3 Science 2008Feeding RelationshipsTeacher notesThis activity provides illustrated examples of pyramids of biomass and pyramids of numbers. It could be used to allow students to draw comparisons between these two methods of representing food chains.
25 Understanding pyramids of numbers Boardworks KS3 Science 2008Feeding RelationshipsIn a pyramid of numbers, the length of each bar represents the number of organisms at each level in the food chain.As a single tree can support many organisms, this food chain produces an unbalanced pyramid.
26 Understanding pyramids of biomass Boardworks KS3 Science 2008Feeding RelationshipsIn a pyramid of biomass, the length of each bar represents the biomass at each level of the food chain.Feeding Relationships Worksheet 2 accompanies this slide.At each level, the amount of biomass and energy available is reduced, giving a pyramid shape.
27 Boardworks KS3 Science 2008 Feeding Relationships Death benefits?Boardworks KS3 Science 2008Feeding RelationshipsWhen animals and plants die, they are decomposed by microbes.In this way, the nutrients that were stored in animals and plants are eventually returned to the soil.The nutrients fertilize the soil, helping producers, such as plants, to grow better.Photo credit: Jupiterimages CorporationAs the number of producers increases, how will this affect the populations of organisms higher up in the food chain?
28 How could change affect ecosystems? Boardworks KS3 Science 2008EcosystemsTeacher notesOther unique habitats may be lost due to the sea level rising. For example 32% of beaches used as nesting sites for turtles could be lost with a 50 cm rise. Wetland sites may also be under threat.See the ‘Feeding Relationships’ presentation for more information about how a change in a population of one species can have an impact on the rest of the food chain.
29 The effect of change on polar bears Boardworks KS3 Science 2008EcosystemsTeachers notesIn stage one of the animation the students could be asked to give reasons why each of the polar bears adaptations are useful.
31 Food chains and pyramids Copy and complete the sentences Boardworks KS3 Science 2008Feeding RelationshipsTeacher notesThis completing sentences activity provides the opportunity for some informal assessment of students’ understanding of food chains and pyramids.
32 Behaviour Focus: Think twice, before taking any actions. The Ecosystem - AdaptationSaturday, 22 April 2017Boardworks GCSE Science: BiologyHealth and DietBehaviour Focus: Think twice, before taking any actions.Copy and leave space to write answers/ responses to the learning objectivesThe Big Question: How do food web, habitats and adaptation help us survive?L.O.1: What are habitat, niche and community?L.O.2: How do living things adapt to the environment?L.O.3: Explain how we can make life easier for living things around us?
33 Boardworks KS3 Science 2008 Ecosystems What is a habitat?Boardworks KS3 Science 2008EcosystemsWhat makes a habitat?A habitat has all of the things that an organism needs to survive, such as the right amounts of oxygen, water, light and shelter.Photo credit: Jupiterimages CorporationHow would you describe your habitat?
34 Different types of habitats Boardworks KS3 Science 2008EcosystemsHow are these habitats similar and how are they different?Photo credit: Jupiterimages Corporation
35 Boardworks KS3 Science 2008 Ecosystems Which land habitat?Boardworks KS3 Science 2008EcosystemsPhoto credit: Jupiterimages Corporation
36 Boardworks KS3 Science 2008 Ecosystems Which water habitat?Boardworks KS3 Science 2008EcosystemsPhoto credit: Jupiterimages Corporation
37 Bees and birds can both live within the canopy of a tree because… When plants and animals found in a particular habitat.An ecosystem is…A community is…A habitat is…A niche is…Bees and birds can both live within the canopy of a tree because…Living organisms in a particular area, and the habitat they live inA place where a plant or animal livesA particular place or role that an organism has in an ecosystemthey can share the habitat and do not compete for food with each other – co-exist. (e.g. bees feed from flowers; birds eat worms)Answer Qu3 on your books
38 Niche of some Farm Organisms FarmersController; overseer; make sure everything works efficientlyShepherd’s DogsControl sheep herds; guard sheep from foxesSheepEat grass; produce wool; produce milk; be butchered as meatCowsEat grass; provide skin as leather and flesh as meat; produce milkCatsCatch mice; Purrrrrrrrrr; Provide happiness for farmersVeges and GrassAbsorb nutrients, CO2 and sunlight to produce food and oxygenFishEat insects in water and grow to provide fish meatTreesAbsorb nutrients, CO2 and sunlight to provide habitatsBirdsEat insects in trees and around fields; provide meat for cats
39 Complete a biomass pyramid of a farm ecosystem Stand up, walk around and ask your classmates what their niche is and guess what organism they have in hand. Then complete the pyramid of biomass with the classmates’ name and the organisms’ names.What is your niche in the farm?Are you …………?THANK YOU!Challenge question: What organism or mechanism would you bring in to make this farm more efficient? Why?
40 Adaptations in different habitats Boardworks KS3 Science 2008EcosystemsThese organisms are all adapted to their environments in very different ways.How are they specially adapted to survive?Photo credit: Jupiterimages CorporationEcosystems worksheet 1 accompanies this slide.
41 Adaptations in similar habitats Boardworks KS3 Science 2008EcosystemsPhoto credit: Jupiterimages Corporation
42 What are adaptations for? Boardworks KS3 Science 2008Ecosystems
44 Boardworks KS3 Science 2008 Feeding Relationships GlossaryBoardworks KS3 Science 2008Feeding Relationshipsbiomass – The living material that makes up all organisms.carnivore – An organism that only eats other animals.consumer – An organism that feeds on plants or animals.food chain – A sequence that shows feeding relationships and the transfer of energy between organisms.food web – Food chains that are linked to show the complex feeding relationships in a habitat.herbivore – An organism that only eats plants.omnivore – An organism that eats both plants and animals.producer – An organism that makes its own food.population – The number of organisms of a species living in an area.pyramid of biomass – A diagram, in which the length of each bar represents the biomass at each level of the food chain.pyramid of numbers – A diagram, in which the length of each bar represents the number of organisms present at each level of the food chain.