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Food Chain Who can tell me what a food chain is?.

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Presentation on theme: "Food Chain Who can tell me what a food chain is?."— Presentation transcript:

1 Food Chain Who can tell me what a food chain is?

2 What is a food chain? Shows how each living thing gets its food. Shows how each living thing gets its food. Some animals eat plants and some animals eat other animals. Some animals eat plants and some animals eat other animals. For example, a simple food chain links the trees & shrubs, the giraffes (that eat trees & shrubs), and the lions (that eat the giraffes). For example, a simple food chain links the trees & shrubs, the giraffes (that eat trees & shrubs), and the lions (that eat the giraffes). Each link in this chain is food for the next link. Each link in this chain is food for the next link.

3 Food Chain vs. Food Web Who can tell me what the difference between a food change and a food web is?

4 Chains vs. Webs A food web is several food chains put together that show many different organisms and their source of food/energy. A food web is several food chains put together that show many different organisms and their source of food/energy.

5 Chains vs. Webs

6 What is the source of energy for all food webs?

7 Producers Plants are called producers because they are able to use light energy from the Sun to produce food (sugar) from carbon dioxide and water. Plants are called producers because they are able to use light energy from the Sun to produce food (sugar) from carbon dioxide and water. Autotroph: Organism that produces its own food (plants) Autotroph: Organism that produces its own food (plants)

8 Consumers Animals cannot make their own food so they must eat plants and/or other animals. Animals cannot make their own food so they must eat plants and/or other animals. They are called consumers. They are called consumers.

9 Consumers There are three groups of consumers. There are three groups of consumers. Animals that eat ONLY PLANTS are called herbivores (or primary consumers). Animals that eat ONLY PLANTS are called herbivores (or primary consumers). carnivores that eat herbivores are called secondary consumers carnivores that eat herbivores are called secondary consumers carnivores that eat other carnivores are called tertiary consumers carnivores that eat other carnivores are called tertiary consumers e.g., killer whales in an ocean food web... phytoplankton → small fishes → seals → killer whales e.g., killer whales in an ocean food web... phytoplankton → small fishes → seals → killer whales Animals that eat OTHER ANIMALS are called carnivores. Animals that eat OTHER ANIMALS are called carnivores. Heterotroph: Organism that must consume (or eat) its food (animals). Heterotroph: Organism that must consume (or eat) its food (animals).

10 Decomposers Then there are decomposers (bacteria and fungi) which feed on decaying matter. Then there are decomposers (bacteria and fungi) which feed on decaying matter.

11 Using the simple food chain below to describe how energy comes from the sun to the plants and the plants pass the energy to the organisms that eat the plants and the process continues. Sun trees giraffes lions Sun trees giraffes lions The sun provides energy to the tree, the tree provides energy to the giraffe, and the giraffe provides energy to the lion. The sun provides energy to the tree, the tree provides energy to the giraffe, and the giraffe provides energy to the lion. This is the flow of energy. This is the flow of energy.

12 Arrange the following into a food web. (Include arrows and group them by producers, consumers and decomposers)

13 Ultimate energy source!

14 Producers: get energy from the sun

15 Consumers: get energy from producers

16 Decomposers: Breakdown dead materials – include fungus and bacteria

17

18 Trophic Level step in a food chain or food web. step in a food chain or food web. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

19 Carnivore organism that obtains energy by eating animals. organism that obtains energy by eating animals. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

20 Herbivore organism that obtains energy by eating only plants. organism that obtains energy by eating only plants. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

21 Omnivore organism that obtains energy by eating both plants and animals. organism that obtains energy by eating both plants and animals. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

22 Energy Pyramid diagram used to show how energy is distributed in food chains of food webs. diagram used to show how energy is distributed in food chains of food webs. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

23 Producer organism that can capture energy from sunlight or chemicals and use it to produce food from inorganic compounds; also called an autotroph. organism that can capture energy from sunlight or chemicals and use it to produce food from inorganic compounds; also called an autotroph. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

24 Consumer organism that relies on other organisms for its energy and food supply; also called a heterotroph. organism that relies on other organisms for its energy and food supply; also called a heterotroph. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

25 Decomposer organism that breaks down and obtains energy from dead organic matter. organism that breaks down and obtains energy from dead organic matter. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

26 Food Chain series of steps in an ecosystem in which organisms transfer energy by eating and being eaten. series of steps in an ecosystem in which organisms transfer energy by eating and being eaten. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

27 Food Web network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem. network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem. Understanding Level: Define (in your own words): __________________________________________________ __________________________________________________ __________________________________________________ Draw:

28 In this food chain, the spiders are – Aproducers Bprimary consumers Ccompetitors Dsecondary consumers

29 Wolves and hawks are at the same trophic level because they – Aboth live on land Bare both large mammals Cboth eat primary consumers Dhave similar hunting patterns

30 Which organisms in this food web can be described as both primary and secondary consumers? AHawks BWeasels CRaccoons DMice

31 Energy used by producers in a grassland food web is provided by —– Asunlight Bphotosynthesis Coxygen Dcarbon dioxide

32 In this diagram of a marine food web, which term describes the sea turtle? AAquatic herbivores BAutotrophic producers CThird-level consumers DPrimary decomposers

33 The diagram represents different levels of a marine food pyramid. Between which two levels is the greatest amount of energy transferred? AR and Q BS and R CT and S DU and T

34 According to this food web, which of the following are omnivores? ASnakes BRabbits CMice DGrasshoppers

35 The diagram shows a standard pyramid of numbers that indicates the number of individual organisms in a community. Which of the following situations would form a pyramid showing more consumers than producers? AA small plot with 500 corn plants and 100 grasshoppers BOne pond with 300 producers and one snake CAn 11,000 m3 lake with 75 fish and one alligator DOne giant oak tree with 10,000 insects and 10 lizards

36 The diagram above is intended to show relationships in an ecosystem. What do the arrows represent? AThe direction of population migration BDifferences in dietary habits CProgressively smaller organisms DThe direction of energy flow

37 Insecticides help humans compete with insects for a resource. Which resource is most likely to be preserved for humans through the use of insecticides? Asunlight Bwater Cfood Dair

38 In this food pyramid, which level contains the greatest amount of energy? ATertiary consumers BSecondary consumers CPrimary consumers DProducers

39 Viruses differ from bacteria in that all viruses – Acause insect-borne diseases Bcan be destroyed by antibiotics Chave rigid cell walls Dmust be reproduced in living cells


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