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Gr6: Life Science

Life Science: Part 2

Organisms are classified based on their source of energy for food. Name 3 different classes of organisms based on their source of food. Producers, consumers and decomposers.
What is an accidental way humans have caused change in the environment? Pollutants from sewage, waste, and chemical change the air, land, and balance of nature.
What is meant by the term limiting factor? Conditions in the environment that put a limit on the size of a population and its growth, like the amount of food available.
What does "range" mean? Describes an area where a type of plant or animal population is found.
What does the term "carrying capacity" mean? Refers to the largest population size that can be supported by the available resources in the area.
What is a producer? An organism that obtains its own food using the Sun's energy, like a plant.
What is a consumer? An organism that obtains food by eating other organisms, like a human eats cow or chicken.
Herbivore Consumers that eat only plants, like a rabbit.
Carnivore Consumers that eat only meat, like a hawk.
Omnivore Consumers that eat BOTH plant and animals, like humans.
Decomposer Organisms that break down the wastes or remains of other organisms like bacteria or fungi.
Population A group of the same kinds of organisms living in a certain place, like fox in a forest.
Community All the populations that live in a certain place and can interact with one another; like zebras interacting with wildebeest and grasses.
Ecosystem A group of communities interacting with each other and the nonliving (abiotic) parts of the environment; like, fish living in a pond with rocks.
Abiotic Non-living things in an ecosystem (like air, soil, rocks, etc.)
Biotic All living things in an ecosystem;like animals and plants.
Population example in the Great Lakes Region Lake Sturgeon in the Detroit River or Salmon in Lake Michigan.
Community example in the Great Lakes Region Samples of shrubs, grasses, frogs, and heron all interacting in the wetland ecosystem.
Ecosystem example in the Great Lakes Region Aquatic, wetland, Shorelands, Uplands, Forest Bank are all examples of these.
Competition Describes the struggle among organisms for resources in an ecosystem.
Parasitism A relationship between two different kinds of organisms in which one benefits and the other is unaffected or affected very little.
Symbiosis A close relationship between two organisms that may help or harm them.
Predator An organism that kills and eats another organism.
Prey An organism that is killed and eaten by another organism.
An example of competition Two rams competing for a mate.
An example of parasitism between two populations in an ecosystem Ticks, fleas, or leaches eating the blood of a host like a human or deer.
Mutualism A symbiotic relationship that benefits both organisms, like the yucca plant and yucca moth.
Commensalism A relationship when one organism benefits yet the other organism is unaffected, like a barnacle on a whale.
Example of a predator and prey relationship. A spider hunting a fly.
Bacteria A decomposer that is a simple one-celled organism that thrives by living on or in another organism.
Fungus A plant-like organism that lacks chlorophyll and must use plant or animal waste as their food source – mushroom.
Created by: salleyj