Bellwork
Download
1 / 22

BELLWORK - PowerPoint PPT Presentation


  • 117 Views
  • Uploaded on

BELLWORK. Lexa has the following symptoms of a cold: • Coughing • Sneezing • Headache • Sore throat Which describes how Lexa contracted this cold? A. Lexa ate food with a fungus in it, which traveled to major organs in her body.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'BELLWORK' - cecile


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Bellwork
BELLWORK

Lexa has the following symptoms of a cold:

• Coughing

• Sneezing

• Headache

• Sore throat

Which describes how Lexa contracted this cold?

A. Lexa ate food with a fungus in it, which traveled to major organs in her body.

B. Lexa inhaled a virus, which traveled to respiratory tissue and interfered with normal breathing function.

C. Lexa walked barefoot in soil containing a parasitic worm. The worm imbedded itself in her skin and sent toxin throughout her body.

D. Lexa touched an object covered with a bacterium. The bacterium penetrated her skin and traveled to her lungs through her blood system.


Bellwork 11 13
Bellwork – 11/13

  • Write down the following questions:

    • Where does our primary source of energy come from?

    • What does the sun “power” with the plant?

    • What is one product of photosynthesis

    • What do herbivores eat?

    • What was an example the video gave of an omnivore?

    • What do scavengers eat?

    • What was an example the video gave of a carnivore?

    • What are bacteria and fungi also known as?

      http://teachertube.com/viewVideo.php?video_id=161083&title=Energy_Flow_in_Ecosystems


Vocabulary
Vocabulary

Ecosystem – interactions between the biotic organisms and the abiotic materials and how materials and energy are transferred

Biotic – living or dead organisms; made up of cells

Examples – plants, animals

Abiotic – non-living materials

Examples – plastic, oxygen, water, rocks, light, heat

Producers – turn the sun’s light energy into chemical (food) energy.

They make their own food b y the process called PHOTOSYNTHESIS

Producers are only in the first trophic level

Examples – plants, algae, bacteria


Consumers – cannot make their own food (chemical energy)

Use chemical energy from other living organisms

Need to eat Producers or Consumers to get their food energy

Found on the second or higher trophic levels

Primary consumers – first consuming organism in a food chain

Second trophic level

Examples – herbivores or omnivores

Secondary consumers – second consuming organism in a food chain

Third trophic level

Examples – carnivores or omnivores

Tertiary consumers – third consuming organism in a food chain

Fourth trophic level

Examples – carnivores or omnivores


Trophic level – feeding level

Herbivore – only eat producers (such as plants)

Carnivores – eat consumers (herbivores or carnivores or omnivores)

Omnivores – eat producers or consumers

Food chain – starts with a producer and only connects with single links (arrows) to the consumers

Example – a typical food chain in a field ecosystem might be: grass  grasshopper  mouse  snake  hawk

Food web – multiple food chains that interconnect showing many feeding relationships


Scavengers – feed on the bodies of larger dead animals

Examples – vultures, eagles, ravens, hyenas, some ants, and beetles

Detrivores – feed on bodies of smaller dead animals and plants

Examples – crabs, earthworms, wood beetles, carpenter ants

Decomposer – feed on any remaining dead plant and animal matter

Examples – bacteria, fungi


Population – organisms that belong to the same species that live in the same ecosystem

Example – people: species in Halifax: ecosystem

Carrying capacity – largest population of a species that an ecosystem can support

Competition – demand for resources

Examples – food, water, mates, space

Population density – the number of organisms within a given space


Vocabulary1
Vocabulary that live in the same ecosystem

  • Predators – an organism that hunts other organisms

  • Prey – an organism that is hunted by a predator

  • Niche – an animal’s role in its ecosystem

  • Habitat – a place where a population lives

  • Biome – ecosystems where several habitats intersect

  • Cellular respiration – the process of breaking down food

    • C6H12O6 + O2  ENERGY + H2O + CO2


Obtaining energy
OBTAINING ENERGY that live in the same ecosystem

  • Every organism needs to obtain energy in order to live

  • The sun is the Earth’s main source of energy

    • Plants get energy from the sun

    • Some animals eat plants

    • Some animals eat other animals


Food chains and webs
FOOD CHAINS AND WEBS that live in the same ecosystem

  • We organize the flow of energy in ecosystems using food chains and webs

    • A food chain is the sequence of who eats whom in a biological community (ecosystem) to obtain nutrition

    • A food web is a network of many food chains


Food chains
FOOD CHAINS that live in the same ecosystem

  • A food chain starts with the primary energy source

    • Usually the sun

  • The next link in the chain is an organism that makes its own food from the primary energy source

    • Photosynthetic plants that make their own food from sunlight

    • Also called autotrophs or primary producers

  • Next come organisms that eat the autotrophs

    • Called herbivores or primary consumers

    • A rabbit that eats grass


Food chains continued
FOOD CHAINS CONTINUED that live in the same ecosystem

  • The next link in the chain is animals that eat herbivores

    • Called secondary consumers

    • Snakes that eat rabbits

  • Next are tertiary consumers

    • Owl that eats snakes

  • The lastlinkin the chain are quaternaryconsumers

    • Hawk that eats owls

      EACH FOOD CHAIN ENDS WITH A TOP PREDATOR, AN ANIMAL WITH NO NATURAL ENEMIES (LIKE AN ALLIGATOR, HAWK, OR POLAR BEAR)



Example of a food chain
EXAMPLE OF A FOOD CHAIN sun to a top predator


Example of food web
EXAMPLE OF FOOD WEB sun to a top predator


Another example of a food web
ANOTHER EXAMPLE OF A FOOD WEB sun to a top predator


Important information to know
IMPORTANT INFORMATION TO KNOW sun to a top predator

  • Some organisms’ position in the food chain can vary as their diet differs

    • For example – when a bear eats berries, the bear is functioning as a primary consumer. When a bear eats a plant-eating rodent, the bear is functioning as a secondary consumer. When a bear eats salmon, the bear is functioning as a tertiary consumer

      • This is because salmon is a secondary consumer since it eats herring that eat zooplankton that eat phytoplankton that make their own energy from the sun

    • THINK ABOUT HOW PEOPLE’S PLACE IN THE FOOD CHAIN VARIES – OFTEN WITHIN A SINGLE MEAL!


More important information to know
MORE IMPORTANT INFORMATION TO KNOW sun to a top predator

  • In any food web, energy is lost each time one organism eats another

    • Because of this, there are many more plants than there are plant-eaters

    • There are more autotrophs than there are heterotrophs

    • More plant-eaters than meat eaters

  • Each level has about 10% less energy available to it because some of the energy is lost as heat at each level


Maintaining equilibrium
MAINTAINING EQUILIBRIUM sun to a top predator

  • As the number of carnivores in a community increases, they eat more and more of the herbivores

  • This decreases the herbivore population

  • It then becomes harder and harder for the carnivores to find herbivores to eat

  • This decreases the carnivores population

  • In this way, the carnivores and herbivores stay in a relatively stable equilibrium by limiting each other’s population

  • A similar equilibrium exist between plants and plant-eaters


5 levels of ecological organization
5 Levels of Ecological Organization sun to a top predator

  • Organism – a living thing

  • Population - organisms that belong to the same species that live in the same ecosystem

  • Community – made up of living things within a specific geological area

  • Ecosystem - interactions between the biotic (living) organisms and the abiotic (non-living) materials and how materials and energy are transferred

  • Biosphere – all ecosystems of the Earth combined


Bellwork 11 12 12
Bellwork – 11/12/12 sun to a top predator

  • Which statement describes the niche of an organism in an ecosystem? (Remember, a niche is an organism’s role in its ecosystem.)

    • A pelican is able to fly long distances without stopping

    • A snake feeds on small rodents in a forest

    • A moth is nocturnal and is attracted to light

    • A frog spends part of its life in water and part on land


ad