AICE marine science AS Level Exam
review paper 1, 2 Questions and
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 number 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 number 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
review paper 1, 2 Questions and
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 number 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 number 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
