AICE marine science AS Level Exam review
paper 1, 2 UPDATED Exam Questions and
CORRECT Answers
scientific method - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER- -
rigorous testing
-repeated testing by many/other scientist
-scientist get similar results but with the same conclusions no exception
symbiosis - CORRECT 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 - CORRECT ANSWER- or food web represent: transfer engery and
biomass
-do not use the words "eats," instead, use consumes
predator/prey relationships - CORRECT ANSWER- remember that the number of predators
lags behind the number of prey organisms
succession - CORRECT ANSWER- tube worms, remember =, tevnia first, the they are
replaced by riftia
extreme and unstable - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER- areas of high biodiversity have a narrow niches
because if niches overlap, individuals will die out.
narrow niches=reduces overlap=reduces competition
niche - CORRECT 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 - CORRECT ANSWER- is the process by which sunlight energy is used to
synthesize/make/convert to glucose by producer
chemosynthesis - CORRECT ANSWER- is the process by which chemical energy is used to
synthesize/make/convert to glucose by bacteria
ecological pyramids - CORRECT ANSWER- do not draw a traditional, sloping pyramid. use
stepped pyramids only. use a scale to show appropriate proportions. make sure you label each
step of the pyramid with: producer, primary consumer, secondary consumer, tertiary consumer,
quaternary consumer. we also suggest that you label everything you know about each level
paper 1, 2 UPDATED Exam Questions and
CORRECT Answers
scientific method - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER- -
rigorous testing
-repeated testing by many/other scientist
-scientist get similar results but with the same conclusions no exception
symbiosis - CORRECT 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 - CORRECT ANSWER- or food web represent: transfer engery and
biomass
-do not use the words "eats," instead, use consumes
predator/prey relationships - CORRECT ANSWER- remember that the number of predators
lags behind the number of prey organisms
succession - CORRECT ANSWER- tube worms, remember =, tevnia first, the they are
replaced by riftia
extreme and unstable - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER- areas of high biodiversity have a narrow niches
because if niches overlap, individuals will die out.
narrow niches=reduces overlap=reduces competition
niche - CORRECT 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 - CORRECT ANSWER- is the process by which sunlight energy is used to
synthesize/make/convert to glucose by producer
chemosynthesis - CORRECT ANSWER- is the process by which chemical energy is used to
synthesize/make/convert to glucose by bacteria
ecological pyramids - CORRECT ANSWER- do not draw a traditional, sloping pyramid. use
stepped pyramids only. use a scale to show appropriate proportions. make sure you label each
step of the pyramid with: producer, primary consumer, secondary consumer, tertiary consumer,
quaternary consumer. we also suggest that you label everything you know about each level
