Assessment+Tasks

** 2012 ** Part 1 – First Hand Investigation Weighting: 25% ** Due: Fri 25th May ** Note – follow the marking criteria closely when completing the task, In this task you will perform a first-hand investigation to identify and describe factors that affect transpiration in plants.
 * Preliminary Biology Assessment Task 2 **
 * 1) Preliminary Research:
 * Define Transpiration
 * Describe how water enters a plant, how it moves through a plant and how it leaves a plant.
 * Draw a flow chart to show the structures and processes involved in the pathway of water through a plant.
 * List external and internal factors which can influence transpiration rates.

2. Investigation:
 * ** Choose one of these factors and design a controlled scientific experiment to demonstrate its effect on transpiration rate. **

3. Report:
 * Write a scientific report of your investigation including all results, graphs, diagrams and photographs of you performing the experiment.

Part 2 – Practical Examination Weighting: 15% **Fri 25th May** This task will be based on dichotomous keys, microscope work, identifying chemical substances in tissues and estimating populations.


 * Marking Criteria for Part 1 **
 * ** - has demonstrated they can design and perform a controlled experiment by: ** || ** Mark ** ||
 * Presenting relevant background research on transpiration with a bibliography || /5 || /19 ||
 * Stating a reasonable hypothesis for investigation || /1 ||^  ||
 * Stating an aim for their investigation || /1 ||^  ||
 * Devising a logical method with
 * a comprehensive list of equipment || /2 ||^  ||
 * * a risk assessment || /2 ||^  ||
 * * an appropriate independent variable || /1 ||^  ||
 * * a detailed description of the dependent variable || /2 ||^  ||
 * * at least 3 controlled variables or a control || /2 ||^  ||
 * * reliability || /1 ||^  ||
 * Recording reliable results data || /1 ||^  ||
 * Providing photographic evidence of performing the experiment || /1 ||^  ||
 * ** - has demonstrated they can analyse data to draw conclusions and evaluate experimental methodology by: ** || ** /6 ** ||
 * Stating a conclusion which links results to the hypothesis || /2 ||^  ||
 * Evaluating the validity, reliability and accuracy of the experiment with suggestions for further investigation. || /4 ||^  ||
 * ** - has demonstrated they can communicate and present scientific information by inclusion of: ** || ** /15 ** ||
 * A detailed flow chart on transpiration || /3 ||^  ||
 * Labelled scientific diagrams of the experimental method || /2 ||^  ||
 * Appropriate use of report text type || /2 ||^  ||
 * A table which displays results clearly and succinctly || /4 ||^  ||
 * An appropriate graph of results data || /4 ||^  ||