This achievement standard involves carrying out a practical biological investigation, with supervision, by planning the investigation, collecting and processing data, and interpreting and reporting the findings.
You will be expected to carry out a practical investigation covering the complete investigation process: planning and carrying out the investigation, collecting primary data, processing and interpreting data, and reporting on the investigation.
The investigation must be based on contexts arising from content at Level 7 of the curriculum
Life processes
Explore the diverse ways in which animals and plants carry out the life processes.
We can work with a testable hypothesis for example the students taking Biology are smarter than those that don't. Use the link to the left and start sampling.
A testable hypothesis is one that is able to be tested by an experiment and has and If and then part to the hypothesis.
Learn more about testable hypotheses here
Hypothesis
Is a Scientific guess at what you think that answer will be based on known Science. More about building a hypothesis here
Variables
Independant Variable
This is only one variable that can be changed per experiment and it must have a range or values that are valid to the biological niche of the study. Validity is linked to how appropriate the independant variable is to the organism being studied.
Dependant Variable
The vairable that is measured by the person doing the experiment. This vairable changes when we change the indepdendant variable changes. There is only one dependant variable per fair test.
Controlled variables
Any other variable that is not being changed or measured should be controlled. The most important ones are the variables that can affect the results. These can include temperature, volume, concentration, light and humidity..
Results
Results are collected as described in the method. The results should be in tabulated form and processed by averaging, excluding outliers and plotting graphs to show any trends in the data. Data when collected needs to be in a tabulated form and include the dependant and independant variables range of values and the units used to collect the data.
Conclusion
The conclusion is to summarize the fidings of the results. It is a description of what the data trends show. It can then to used to support or reject the hypothesis of the experiement.
Evaluation
Evaluation of the data should alanyese the accuracy of the investigation. It should that your results were valid and why. It is also reliable becuase you repeated it enough times to get confluent results. Explain what went well and where accuracy, reliablity and validity could be improved next time. You may outline any changes you would make in other experiments that would help to exclude outliers and anomolies. It is important to address how outliers may have happened and what you might do next time to help fix the outliers.
Tonicity: The extracellular water that surrounds the cell and it's ability to create a concentration gradient that will move water
Osmolarity: is the measure of dissolved salts (solute) in a solution
Hypertonic: These solutions carry more salts the the surrounding cells they are more concentrated and therefore are a high osmolarity
Hypotonic: These solutions carry less salt than the surrounding cells. They are less concentrated and have a lower osmolarity
Isotonic: These solutions have the same amount of salts and therefore will not pull water from the surrounding cells. they have the same osmolarity as the inside of the cell.
https://www.sciencefacts.net/tonicity.html for more detailed information\
Also see BBC bitesize
Pages 45-49
passive transport
passive transport