1 / 26

Grade 7 Science

Grade 7 Science. Unit 1: Interactions within Ecosystems. What is an Ecosystem?. Complete the activity on page 5: What is an Ecosystem?. What is an Ecosystem?. What is found in an ecosystem? Animals and Plants An organism is any living thing, such as a plant or animal.

elliot
Télécharger la présentation

Grade 7 Science

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Grade 7 Science Unit 1: Interactions within Ecosystems

  2. What is an Ecosystem? Complete the activity on page 5: What is an Ecosystem?

  3. What is an Ecosystem? • What is found in an ecosystem? • Animals and Plants • An organism is any living thing, such as a plant or animal.

  4. What is an Ecosystem? • Places where organisms live are called habitats. • Everything that is needed for an organism to survive would be found in a habitat.

  5. What is an Ecosystem? • Non-living things that affect organisms are called abiotic factors. • What are some examples? • Water, rocks, sunlight, and air

  6. What is an Ecosystem? • Living things that are found in an environment are called biotic factors. • Organisms are biotic factors. • How do animals affect each other? • Feed each other • Compete with each other • Help each other

  7. Activity: Abiotic & Biotic Factors • Cards placed into correct category

  8. What is an Ecosystem? • An ecosystem is all the living and non living things in a particular place. • How large is an ecosystem? • Ecosystems can be very large, like the ocean or forest, • or they can be very small, like under a log or a nest in a tree.

  9. What is an Ecosystem? • There are four ecosystems in Atlantic Canada: • Coastlines and oceans • Brown seaweeds, barnacles, mussels, starfish, rock crabs • Water currents affect temperatures and climate • Larger animals include cod, seals, and whales • Salt content affect organisms • Deep water prevent sunlight from reaching bottom

  10. What is an Ecosystem? • Freshwater: Rivers, Lakes and Ponds • Fish such as whitefish and sticklebacks • Beavers, muskrats, ducks, and geese • Frogs, insects, snails • Water plants • Rain and snow supply water

  11. What is an Ecosystem? • Arctic • Northern Labrador • Very low temperatures and little precipitation • Permafrost: soil is always frozen one metre below the surface • Low shrubs, mosses, lichens and small flowers • Caribou, musk ox, wolves, arctic foxes, arctic hares, lemmings • Birds during spring and summer

  12. What is an Ecosystem? • Forests • Much of Newfoundland and Labrador • Summers cool and winters wet • Balsam fir, white birch, black spruce, mountain ash • Moose, caribou, black bear, lynx, red fox, pine marten, mink • Sometimes bogs and marshes • Peat (buildup of decaying plant matter)

  13. Activity: Foldable • Create a foldable showcasing the ecosystems found in Newfoundland.

  14. What is an Ecosystem? • Most plants and animals have a range of tolerance. • Range of Tolerance is the range of conditions within which an organism can live. • Ex: heat, light, water, etc. • Range of tolerance is the factor that determines where organisms live.

  15. What is an Ecosystem? • Abiotic Factors: • 1. Light and light intensity • All plants need light to survive. • Some plants need more light than others. • Animals can survive in dark and light areas.

  16. What is an Ecosystem? • 2. Temperature • All animals and plants have a certain temperature that they need to survive.

  17. What is an Ecosystem? • 3. Soil • Plants get nutrients from the soil. • Plants grow roots into soil. • Animals form tunnels for air and water to move through.

  18. What is an Ecosystem? • 4. Air and Wind • Windy areas can affect plant growth since these areas tend to be dry. • Plants usually grow shorter than normal. • Animals that fly can also be affected by the wind.

  19. What is an Ecosystem? • 5. Water • All organisms need water to survive. • Some organisms can survive with smaller amounts of water.

  20. What is an Ecosystem? • What are biotic factors? • Ecologists study ecosystems by first studying a species. • A species is a group of organisms that can reproduce to produce similar, fertile organisms.

  21. What is an Ecosystem? • When only one organism is studied, that is an individual. • When many organisms of the same species live in the same ecosystem, they make a population. • A group of populations which interact and share a common ecosystem form a community. • What populations are there in Clarenville?

  22. Habitat versus Niche • Habitat: the organism’s address; where does it live? • Ex. A moose’s habitat is the boreal forest.

  23. Niche • Niche: the organism’s job; what role does the organism play in its environment. It includes: • where it lives • how it obtains food • how it affects its environment

  24. Niche • Ex. A moose lives in the boreal forest, it is a herbivore (plant eater), it provides a home for parasites and it provides food for coyotes.

  25. ActivityThink About It... Seabirds! p. 26 • Complete the dichotomous key

  26. Chapter 1 Assignment

More Related