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32 terms

Life Science

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Organism
A living thing that has the ability to act or function independently
Producer
an organism that makes its own food (plants)
Consumer
organisms that obtain food by eating other organisms
Scavenger
an animal that eats only dead organisms
Decomposer
an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients
Food Chain
the path of food from one living thing to another
Food Web
The pattern of overlapping food chains in an ecosystem
Biotic
living organisms
Abiotic
non-living things in an ecosystem
Energy Pyramid
Shows the amount of energy that moves from one trophic feeding level to another in a food web
Interdependence
All organisms interact with other organisms in their surroundings and with the nonliving portion of their environment. Ecologists refer to this quality as....
Biome
A group of ecosystems classified by climate and plant life
Tundra
Biome that surrounds the north and south poles; treeless land with long summer days and short periods of winter sunlight, beneath the topsoil is a layer of permafrost.
Rain Forest
warm, wet ecosystem with millions of species of animals, birds, insects and plants. It is known as the most diverse biome of the world.
Desert
An extremely dry area with little water and few plants. Animals are nocturnal.
Deciduous Forest
a forest biome with many kinds of trees that lose their leaves each autumn after changing colors. It has the richest and most fertile soil.
Coniferous Forest
a type of forest characterized by cone-bearing, needle-leaved trees that can survive in a colder climate (Taiga)
Savannah
open grassland with scattered trees- tall grasses as found in Africa
Prairie
a large, level area of grassland with few or no trees- short grasses.
Ocean
A large body of salt water
Fresh Water Biome
Includes ponds,lakes,streams,and rivers.
Symbiosis
relationship in which two species live closely together
Mutualism
a relationship between two species in which both species benefit
Parasitism
the relation between two organisms in which one benefits and the other is harmed or damaged
Commensalism
A relationship between two species in which one species benefits and the other is neither helped nor harmed
Prey
an organism that is killed and eaten by another organism
Predator
an animal that hunts and eats other animals
herbivore
an animal that eats only plants
carnivore
consumers that eat only animals
omnivore
eats plants and animals
trophic
Each step in a food chain or food web
population
A group of individuals of the same species that live in the same area.