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Science 10 Unit 1
Science ch.1-4
Term | Definition |
---|---|
Ecosystem | All the living things in an area are interacting with each other and nonliving things |
Producers | Plants capture energy from the sun |
Primary Consumers | Herbivores |
Secondary Consumers | Carnivores |
Food Chains | Transfer of energy and materials between living things |
Detritivores | Organisms that eat on dead things, allowing nutrients to be recycled;worms |
Carrying capacity | Food Supply, Competition, Predators affect maximum number of species it can support |
interspecific | Animals competing against different animals |
Intraspecific | Animals competing against same animals |
High Population Density | Causes stress and spreads disease and parasites |
Rain forests and wetlands | High plant productivity but soil quickly erodes |
Deserts | Lots of sunlight and little water |
Percent lost per link in food chain | 90% of energy is lost so humans should eat plants |
Monoculture | Growing only one kind of crop and are more vulnerable to pests |
Earth and energy | Energy from sun is constantly recieved |
Earth and Matter | Earth needs to recycle nutrients for ecosystems to survive |
Living Tissues | Made of carbon, hydrogen,oxygen, and nitrogen |
Photosynthesis | Plants take in carbon dioxide from air and combine it with water to make carbohydrates which store energy from sun. Oxygen is the byproduct from this |
Cellular Respiration | The opposite of photosynthesis. Makes carbon dioxide by living things burning carbohydrates. |
Fossil Fuels | From the Carboniferous Period (300 million years ago) where plant material was trapped under sediment and then dug up to make coal and oil. This releases carbon into the air and has disrupted the carbon cycle. |
Ocean and Lakes carbon cycle role | Phytoplankton make half of the oxygen from photosynthesis. Organisms with shells store carbon in calcium form. |
Carbon in water | Carbon dioxide dissolves in water so too much is harmful to aquatic ecosystems and makes water acidic. |
Nitrogen | makes up 75% of atmosphere and must be fixed by nitrogen fixing bacteria into ammonium or nitrate. Fertilizer uses it and too much makes soil acidic and water eutrophoric |
Nitrogen fixation | Nitrogen fixing bacteria found in the roots of legumes, lightning, and Cyanobacteria |
Eutrophorification | The overgrowth of algae caused by too much nitrogen in water. Prevents sunlight from reaching deep water. When the algae die the bacteria that decomposes it kills other animals |
Nitrogen and fossil fuels | Fossil fuels release nitrogen oxides when burned. This makes acid rain that damages plants and water and the animals relying on those things. |
Biodiversity | When there are a variety of different species within an ecosystem |
Soil | Made of small rocks, decomposing plant and animals. Lots of rain makes forest, little rain makes grassland and no rain makes deserts. |
Primary succession | The process of when a bare rock and no soil landscape turns into one that has plant and animal life |
Pioneer organisms | Colonize on landscapes with little to no soil. Lichens, fungi, algae |
Climax community | A community where the maximum animal and plant life inhabit the area |
Secondary succession | A process caused by fire or flooding. When there is only soil and turns into a climax community. |
Bog land | Rich in peat, a partially decomposed plant material, enriches garden soil and can be used as soil. They prevent flooding and erosion also filters water |
The Tragedy of commons | The tendency of shared resources to be abused due to selfishness. |
Ecological Footprint | Space for living+Land and water used to produce resources+land and water used to dispose of waste. |
Paradigm | a way of thinking about the world shared by a community (ex. Unlimited growth) |
phytoremediation | plants that take up pollutants as they grow |