15 flashcards for Mrs. Brodbeck's Science semester 1 final exam
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| permafrost | soil, rock or sediment that is frozen for more than two consecutive years. In areas not overlain by ice, it exists beneath a layer of soil, rock or sediment, which freezes and thaws annually and is called the "active layer".
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| estuary | the tidal mouth of a large river, where the tide meets the stream
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| population density | the number of individuals in a given area
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| exponential growth | when individuals in a population reproduce at a constant rate - need unlimited resources (J-curve graph)
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| logistic growth | when a population's growth rate slows and stops after a period of exponential growth - happens when a populations gets too large (s-curve graph)
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| symbiosis | any relationship in which 2 species live closely
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| adaptation | any characteristic of an organism which makes that organism better suited to its environment
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| independent variable | a variable whose variation does not depend on that of another
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| dependent variable | a variable whose value depends on that of another
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| control group | the group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do
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| experimental group | the group that receives an experimental procedure or a test sample. This group is exposed to changes in the independent variable being tested.
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| sustainable forestry | process of planting young trees after cutting down trees, in order to maintain a constant supply of trees
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| density-dependent limiting factors | depends on the size of the population and becomes a factor when the population is large
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| density-independent limiting factors | affects the population regardless of the size
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| biodiversity | the number of different species in an area
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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