5 Written Questions
5 Matching Questions
- Biogeochemical cycles
- Phosphorus cycle
- Greenhouse effect
- a A measure of the total dry mass of organisms within a particular region
- b Anticipated increase in Earth's temperature, caused by carbon dioxide (emitted by burning fossil fuels) trapping some of the radiation emitted by the surface.
- c Cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment
- d The pathways by which chemicals circulate through ecosystems that involve both living (biotic) and nonliving (geological) components.
- e A catabolic process that makes a limited amount of ATP from glucose without an electron transport chain and that produces a characteristic end product, such as ethyl alcohol or lactic acid.
5 Multiple Choice Questions
- Process in which certain organisms (mostly specialized bacteria) extract inorganic compounds from their environment and convert them into organic nutrient compounds without the presence of sunlight. Compare photosynthesis.
- All organisms that are the same number of energy transfers away from the original source of energy (for example, sunlight) that enters an ecosystem. For example, all producers belong to the first trophic level, and all herbivores belong to the second trophic level in a food chain or a food web.
- Organisms that obtain energy by eating only plants
- Rate at which all the plants in an ecosystem produce net useful chemical energy; equal to the difference between the rate at which the plants in an ecosystem produce useful chemical energy (gross primary productivity) and the rate at which they use some of that energy through cellular respiration. Compare gross primary productivity.
- Organisms that produce their own food
5 True/False Questions
Troposphere → The lowest layer of the atmosphere, in which temperature drops at a constant rate as altitude increases; the part of the atmosphere where weather conditions exist
Primary consumers → Organisms that are unable to produce their own energy. They must eat producers to obtain energy. Also called: consumers.
Gross Primary Productivity (GPP) → Rate at which all the plants in an ecosystem produce net useful chemical energy; equal to the difference between the rate at which the plants in an ecosystem produce useful chemical energy (gross primary productivity) and the rate at which they use some of that energy through cellular respiration. Compare gross primary productivity.
Food chain → Organisms that produce their own food
Carnivores → A consumer that eats both producers and other consumers