AICE marine science AS Level Exam review paper 1, 2 Questions with Correct Answers
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Module
Marine Science
Institution
Marine Science
scientific method - Answer-1. for valid experiments, data should be collected numerous times (the more times, the more accurate)
2. only one variable (independent) should be changed in an experiment. All others should be controlled. The deponent variable is dependent upon what you changed-it will ...
AICE marine science AS Level Exam
review paper 1, 2 Questions with Correct
Answers
scientific method - Answer-1. for valid experiments, data should be collected numerous
times (the more times, the more accurate)
2. only one variable (independent) should be changed in an experiment. All others
should be controlled. The deponent variable is dependent upon what you changed-it will
be what you are measuring in n experiment
3. quantitative results- numbers (qualitative=descriptive words)
outlining/designing an experiment - Answer--state amount of containers e.g. 5 tanks of
each
-state constants (at minimum 3) (light, salinity, amount of water, how often results are
calculated, amount f exposure/days etc.)
-what is the amount of independent variables used? pick a quantity suitable for the
experiment appropriate to the experiment
-state the duration of the entire experiment
-state the calculating results. most common is simple counting
-state repeat experimentation and calculate mean/average from all trials
describing results of an experiment - Answer--state the most with reference to data
-state the least with reference to data
-manipulate data by finding range
creating or working with graphs - Answer--use the entire graph
-correctly label the x and y axis
-use correct intervals. do not use breaks to begin at certain number. each interval is
equally spaced. use appropriate scale the divide the total number of spaces on the
graph by the range. this will give you your interval.
-when constructing a graph, make sure your scale is appropriate to show a relationship-
you may need to have values on the axis to the left and to the right
-plot all points correctly
-line of best fit
explain what would be needed to turn an experiment into a theory - Answer--rigorous
testing
-repeated testing by many/other scientist
-scientist get similar results but with the same conclusions no exception
symbiosis - Answer-remember that aice looks at symbiosis and mutualism one in the
same. it is a close relationship between 2 different species where both benefit. make
, sure you explain what both are getting/giving. examples: coral and zooxanthellae; tube
worms and chemo. bacteria
arrows in a food chain - Answer-or food web represent: transfer engery and biomass
-do not use the words "eats," instead, use consumes
predator/prey relationships - Answer-remember that the number of predators lags
behind the number of prey organisms
succession - Answer-tube worms, remember =, tevnia first, the they are replaced by
riftia
extreme and unstable - Answer-explain why extreme and unstable environments have
low biodiversity
first, define terms: extreme, unstable, and biodiversity
second, give examples of each environment with organism's adaptation to that
environment
extreme environments - Answer-have a low ph, high temperature, low oxygen and high
salinity
-extreme environments have limited resources
-hydrothermal vents are an extreme environment
-example of an organism at a hydrothermal vent is chemosynthetic bacteria
unstable environments - Answer--sandy environments where there is sand slippage;
organisms are easily washed away
-organsims burrow to avoid being washed/swept away. they are also exposed to air, so
desiccation can occur. organisms must adapt.
high biodiversity - Answer-areas of high biodiversity have a narrow niches because if
niches overlap, individuals will die out.
narrow niches=reduces overlap=reduces competition
niche - Answer-an organisms role in its environment
-generalized- an organisms having a wide range of food and habitat
-specialized- an organism that has a narrow food requirement and lives in a specific
habitat
photosynthesis - Answer-is the process by which sunlight energy is used to
synthesize/make/convert to glucose by producer
chemosynthesis - Answer-is the process by which chemical energy is used to
synthesize/make/convert to glucose by bacteria
ecological pyramids - Answer-do not draw a traditional, sloping pyramid. use stepped
pyramids only. use a scale to show appropriate proportions. make sure you label each
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