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Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
Give an example of a consumer.
What are the 4 kinds of consumers?
Give an example of a decomposer.
What do food chains show?
What does a food chain always begin with?
What’s the difference between a food chain and a food web?
What does an energy pyramid show?
Summary
Energy Roles
An organism’s energy role is determined by how it obtains energy and how it interacts with other organisms.
Each of the organisms in an ecosystem fills the energy role of producer, consumer, or decomposer.
Producers
Energy enters most ecosystems as sunlight.
Some organisms, such as plants, algae, and some bacteria, capture the energy of sunlight and store it as food energy. (Through photosynthesis)
An organism that can make its own food is a producer.
Energy is transferred to
Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
plants, algae, and some bacteria
Give an example of a consumer.
What are the 4 kinds of consumers?
Give an example of a decomposer.
What do food chains show?
What does a food chain always begin with?
What’s the difference between a food chain and a food web?
What does an energy pyramid show?
Summary
Consumers Some members of an ecosystem
cannot make their own food. An organism that obtains energy
by feeding on other organisms is a consumer.
Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
plants, algae, and some bacteria
Give an example of a consumer.
Any organism that obtains energy by feeding on other organisms (Wolf, Bird, People etc.)
What are the 4 kinds of consumers?
Give an example of a decomposer.
What do food chains show?
What does a food chain always begin with?
What’s the difference between a food chain and a food web?
What does an energy pyramid show?
Summary
ConsumersConsumers are classified (grouped)
by what they eat. HerbivoresCarnivoresOmnivoresScavengers
Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
plants, algae, and some bacteria
Give an example of a consumer.
Any organism that obtains energy by feeding on other organisms (Wolf, Bird, People etc.)
What are the 4 kinds of consumers?
Herbivores CarnivoresOmnivoresScavengers
Give an example of a decomposer.
What do food chains show?
What does a food chain always begin with?
What’s the difference between a food chain and a food web?
What does an energy pyramid show?
Summary
Consumers - HerbivoresConsumers that eat only plants are herbivores.
Examples: caterpillars and deer
Consumers - CarnivoresConsumers that eat only animals are carnivores.
Examples: Lions and spiders
Consumers - OmnivoresConsumers that eat both plants and
animals are omnivores. Crows, bears, and most humans are omnivores.
Animal Diet Gamehttp://www.sheppardsoftware.com/content/an
imals/kidscorner/games/animaldietgame.htm
Consumers - ScavengersSome carnivores are scavengers. A scavenger is a carnivore that
feeds on the bodies of dead organisms.
Examples: catfish and vultures
http://www.fisheriesmanagement.co.uk/catfish/catfish_introduction.htm
Decomposers Decomposers break down wastes and dead
organisms and return the raw materials to the ecosystem.
You can think of decomposers as nature’s recyclers.
Mushrooms and bacteria are common decomposers.
Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
plants, algae, and some bacteria
Give an example of a consumer.
Any organism that obtains energy by feeding on other organisms (Wolf, Bird, People etc.)
What are the 4 kinds of consumers?
Herbivores CarnivoresOmnivoresScavengers
Give an example of a decomposer. Mushrooms and
bacteriaWhat do food chains show?
What does a food chain always begin with?
What’s the difference between a food chain and a food web?
What does an energy pyramid show?
Summary
Food Chains and Food WebsEnergy enters most ecosystems as sunlight
and is converted into food molecules by producers.
This energy is transferred to each organism that eats a producer, and then to other organisms that feed on these consumers.
The movement of energy through an ecosystem can be shown in diagrams called food chains and food webs.
Food ChainsEvery living thing needs energy in order to
live. Every time animals do something (run, jump) they use energy to do so. Energy is necessary for living beings to live and grow.
Animals get energy from the food they eat, and all living things get energy from food.
Plants use sunlight, water and nutrients to get energy (photosynthesis).
Food ChainsA food chain shows how each living thing
gets food, and how nutrients and energy are passed from creature to creature.
Food chains begin with plant-life, and end with animal-life. Some animals eat plants, some animals eat other animals.
http://www.sheppardsoftware.com/content/animals/kidscorner/foodchain/decomposers.htm
There is actually even more to this chain. After a hawk dies, fungi (like mushrooms)
and other decomposers break down the dead hawk, and turn the remains of the hawk into nutrients, which are released into the soil.
The nutrients (plus sun and water) then cause the grass to grow.
It's a full circle of life and energy!!
http://www.sheppardsoftware.com/content/animals/kidscorner/games/foodchaingame.htm
Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
plants, algae, and some bacteria
Give an example of a consumer.
Any organism that obtains energy by feeding on other organisms (Wolf, Bird, People etc.)
What are the 4 kinds of consumers?
Herbivores CarnivoresOmnivoresScavengers
Give an example of a decomposer.
Mushrooms and bacteria
What do food chains show?
The show how each living thing gets food, and how nutrients and energy are passed from creature to creature.
What does a food chain always begin with?
A producer
What’s the difference between a food chain and a food web?
What does an energy pyramid show?
Summary
Food Webs
A food web consists of the many overlapping food chains in an ecosystem.
http://teacher.scholastic.com/activities/explorer/ecosystems/be_an_explorer/map/foodweb_play.htm
http://www.harcourtschool.com/activity/food/food_menu.html
http://www.biologycorner.com/worksheets/foodweb.htm
http://www.vtaide.com/png/foodchains.htm
Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
plants, algae, and some bacteria
Give an example of a consumer.
Any organism that obtains energy by feeding on other organisms (Wolf, Bird, People etc.)
What are the 4 kinds of consumers?
Herbivores CarnivoresOmnivoresScavengers
Give an example of a decomposer.
Mushrooms and bacteria
What do food chains show?
The show how each living thing gets food, and how nutrients and energy are passed from creature to creature.
What does a food chain always begin with?
A producer
What’s the difference between a food chain and a food web?
A food chain shows only one path of energy. A food web shows the many paths energy can travel through an ecosystem.
What does an energy pyramid show?
Summary
Energy PyramidsAn energy
pyramid shows the amount of energy that moves from one feeding level to another in a food web.
Where is the most energy available?
Why does less energy become available at each level?
Important Questions
Energy Flow In Ecosystems
Give an example of a producer.
plants, algae, and some bacteria
Give an example of a consumer.
Any organism that obtains energy by feeding on other organisms (Wolf, Bird, People etc.)
What are the 4 kinds of consumers?
Herbivores CarnivoresOmnivoresScavengers
Give an example of a decomposer.
Mushrooms and bacteria
What do food chains show?
The show how each living thing gets food, and how nutrients and energy are passed from creature to creature.
What does a food chain always begin with?
A producer
What’s the difference between a food chain and a food web?
A food chain shows only one path of energy. A food web shows the many paths energy can travel through an ecosystem.
What does an energy pyramid show?
shows the amount of energy that moves from one feeding level to another in a food web.
Summary
Biology The Science of LifeForward to food chains and food webs. (7:39-14)
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