5 Written questions
5 Matching questions
- Hydrologic (water) cycles
- Primary consumers
- a Continuous movement of water on, above and below the surface of the Earth.
- b Organisms that rely on other organisms for their energy and food supply
- c All the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment
- d A mixture of gases that surround the Earth
- e Organisms that are unable to produce their own energy. They must eat producers to obtain energy. Also called: consumers.
5 Multiple choice questions
- The layer of Earth's atmosphere that extends from the troposhere to the mesosphere; concentrations of ozone cause it to get warmer as you go up in this layer.
- Pertaining to life; environmental factors created by living organisms
- Cyclic movement of sulfur in different chemical forms from the environment to organisms and then back to the environment.
- Diagram representing the flow of energy through each trophic level in a food chain or food web. With each energy transfer, only a small part (typically 10%) of the usable energy entering one trophic level is transferred to the organisms at the next trophic level. Compare pyramid of biomass, pyramid of numbers.
- All the organisms that inhabit a particular area; an assemblage of populations of different species living close enough together for potential interaction.
5 True/False questions
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.
Decomposers → All the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment
Natural greenhouse effect → Anticipated increase in Earth's temperature, caused by carbon dioxide (emitted by burning fossil fuels) trapping some of the radiation emitted by the surface.
Photosynthesis → Process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches.
Autotrophs → Organisms that rely on other organisms for their energy and food supply