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Life Science

Ch. 19 Q's

What is the biosphere? The biosphere is the area of earth that can support life.
What is ecology? Ecology is the study of how living organisms interact with one another an their environment.
What is an ecosystem and how is it defined? An ecosystem is the association and interaction of all living organisms within their physical environment. the boundaries of an ecosystem are the biotic and abiotic mass (or biotic and abiotic components).
What are the two general components of an ecosystem called? The two general components of an ecosystem are the biotic and abiotic mass (or biotic and abiotic components.
Is rock, sand, and water considered biotic or abiotic mass? Rock, sand, and water are all examples of abiotic mass.
True or False? Cellular respiration increases the amount of carbon dioxide in the atmosphere. True.
True or False? Burning increases the amount of oxygen in the air. False. Burning decreases the amount of oxygen in the air. It increases the amount of carbon dioxide in the air.
What is the difference between biodegradable and non-biodegradable pollutants? Biodegradable pollutants can be broken down by organisms that live in the ecosystem; non-biodegradable pollutants cannot.
Which group usually includes the largest number of organisms in an ecosystem, a population or community? A community includes more organisms that a population (i.e. communities are larger than populations).
What is a food web? A food web is a fairly accurate depiction or description of the energy transfer that occurs between producer, consumer, and decomposer in an ecosystem. Basically a food web shows "who eats who" in an ecosystem.
True or False? A food web is a way of graphically showing which organisms use others as food sources. True.
What is the difference between mimicry and camoflauge? Mimicry is when a non-harmful organism resembles a harmful one or when a harmful organism resembles a non-harmful organism. Camouflage is when an organism is shaped and/or colored to blend into its environment.
How many earth biomes are there? There are seven established terrestrial biomes. However, do not forget the aquatic biomes. There are many different marine and fresh-water biomes.
If you are standing in a grassy field, the temperature is 18degrees Celsius, and you notice the topsoil is black and rich, in which biome would you be standing? The temperate grassland biome.
What is permafrost? Permafrost is a layer of soil that is permanently frozen. It is found only in tundra.
Describe the process of primary and secondary succession and reaching a climax community. In order for succession to occur, an ecosystem need to be destroyed or needs to be a potential ecosystem with no species living in it. Initially, brand new species begin to inhabit the ecosystem. These are the pioneer species.
Describe the process of primary and secondary succession and reaching a climax community.(Continued) Over time, more and more species move into the ecosystem. This is termed primary succession. As more time passes, still more species move into the system and begin to replace those there before. This is called secondary succession.
Describe the process of primary and secondary succession and reaching a climax community.(Continued again) Over time, there will be no net change in the species that inhabit the ecosystem and when this happens, the climax community is reached.
Created by: kaisnead
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