Biology
- Homework- Gas Exchange
After watching the video clip (under lung structure post) on gas exchange in the lungs, write a detailed account of how gas exchange occurs. You need to include terms such as: surface area, diffusion, alveoli, capillary network etc You should of course...
- Presenting And Processing Data
The following notes and link will help you present and process your data correctly: · Review your data. Try to look at the results of your experiment with a critical eye. Ask yourself these questions: o ...
- Homework
Plan an experiment to test the hypothesis that acidity affects the germination of a seed. You need to identify all the varaibles: Independent, dependent and controlled. You need to have a control group and explain clearly how you control all the variables...
- # 72 Graphs And Other Ways Of Displaying Data
When you have collected your data and completed your results table, you will generally want to display the data so that anyone looking at them can see any patterns. 1. Line graphs Line graphs are used when both the independent variable and...
- #69 How To Get High Marks In Paper 3 - Variables
Many of the experiments that you will do during your AS course, and usually Question 1 in the examination paper, will investigate the effect of one factor on another. These factors are called variables. Types of variables The factor that you change...
Biology
Summary Sheet. Scientific Method and The Characteristics of living Things
EAL Biology ? Unit One
Characteristics of Life
- Acquire energy; eating, photosynthesis. Respire glucose in order to convert the chemical energy into other forms which can be used
- Respond to stimuli
- Homeostasis- The ability of an organism to maintain equilibrium or stability within its own system despite changes outside
- Capacity to evolve; made of cells containing DNA
- Growth and Development
- Contain a level of organization- have a definite structure within tissues and cells. Can organize simple molecules into more complex ones.
- Reproduce
Scientific Method
A process or series of logical steps to make sure the experiment is valid, objective, and repeatable
1. Observation/prior knowledge
2. Problem and Hypothesis (an idea that can be tested)
3. Design experiment:
- Control group: group that is left alone, under normal conditions, not exposed to independent variable. It is for comparison.
- Experimental group: group that is manipulated, changed, exposed to independent variable
- Independent variable: the variable that you are changing. There must be only one independent variable that is changed at a time.
- Dependent variable: the response to the independent variable. What you are measuring
- Controlled variables/constants: environmental conditions that are the same for both groups, to ensure any difference measured is only due to the independent variable
5. Data collection and processing. Collecting the data in a suitable format with units and carrying out any necessary calculations. Presenting the data in a suitable format. E.g. graph, pie chart etc.
6. Conclusion & Evaluation: Was hypothesis supported or refuted? What conclusions can you make from your data? What were the sources of error in your experiment? How could the experiment be improved?
- Homework- Gas Exchange
After watching the video clip (under lung structure post) on gas exchange in the lungs, write a detailed account of how gas exchange occurs. You need to include terms such as: surface area, diffusion, alveoli, capillary network etc You should of course...
- Presenting And Processing Data
The following notes and link will help you present and process your data correctly: · Review your data. Try to look at the results of your experiment with a critical eye. Ask yourself these questions: o ...
- Homework
Plan an experiment to test the hypothesis that acidity affects the germination of a seed. You need to identify all the varaibles: Independent, dependent and controlled. You need to have a control group and explain clearly how you control all the variables...
- # 72 Graphs And Other Ways Of Displaying Data
When you have collected your data and completed your results table, you will generally want to display the data so that anyone looking at them can see any patterns. 1. Line graphs Line graphs are used when both the independent variable and...
- #69 How To Get High Marks In Paper 3 - Variables
Many of the experiments that you will do during your AS course, and usually Question 1 in the examination paper, will investigate the effect of one factor on another. These factors are called variables. Types of variables The factor that you change...