finals module 7

Mutated Lemon · 100問 · 2年前

通報

問題一覧

is the transfer of energy from one organism to another in an ecosystem

Energy flow

This is a natural system altered by men through agricultural activity.

Agroecosystem

Interconnected food chains are illustrated in a model called

Food webs

show the flow of energy from plant to animal and from animal to animal.

Food chains

The first trophic level includes organisms that are called

Producers

The second trophic level of organisms gets energy by eating other organisms.

Consumers

is a model that shows the loss of energy from one trophic level to another

Food pyramids

break down dead or decaying consumers and producers via chemical reactions and use the energy released from rearranging those molecules for growth and development.

Decomposers

are chemicals required for plant and animal growth and other life processes

Nutrients

describes the breakdown of organic wastes and dead organisms.

Decomposition

is an essential component of cells and life-sustaining chemical reactions.

Carbon Cycle

describe the flow of nutrients in and out of stores as a result of biotic and abiotic processes

Nutrient cycles

plants and animals obtain energy by converting carbohydrates and oxygen (O2) into carbon dioxide and water.

Cellular respiration

is a chemical reaction that converts solar energy and atmospheric carbon dioxide gas (CO2) into chemical energy.

Photosynthesis

Dissolved carbon dioxide is stored in oceans. Marine organisms store carbon-rich carbonate (CO3 2- ) in their shells, which eventually form sedimentary rock.

Ocean processes

Nitrogen gas is converted into nitrate (NO3 - ) and ammonium (NH4 +), compounds that are usable by plants.

Nitrogen fixation:

is an important component of DNA and proteins

Nitrogen

occurs mainly through nitrogen-fixing bacteria, and when lightning strikes in the atmosphere.

Nitrogen fixation

Ammonium is converted into nitrate and nitrite (NO2- ) through the work of nitrifying bacteria.

Nitrification

Denitrifying bacteria convert nitrate back into atmospheric nitrogen

Denitrification

Useable forms of nitrogen are taken up by plant roots and incorporated into plant proteins.

Uptake

through chemical or physical means—breaks down rock, releasing phosphate into the soil from longer-term stores.

Weathering

carries energy to cells.

Phosphorus

Nutrient cycles

the carbon cycle, the nitrogen cycle, the phosphorus cycle

is a major problem that is yet to be solved.

Global pollution

Causes of Pollution

Burning Fossil Fuels, Deforestation, Vehicular Pollution, Industrial Pollution

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