describing and explaining patterns of data in graphs
DESCRIPTION
Example 1 Time spent training Skill level at football Describing the pattern: The longer people train the higher their skill levelTRANSCRIPT
Describing and Explaining Patterns of Data in Graphs
Graph Layout
Independent variable
Dependent variable
When you describe patterns on graphs you are describing how the dependent variable changes in relation to the independent variable
Example 1
Time spent training
Skill level at football
Describing the pattern:
The longer people train the higher their skill level
Example 2
Temperature of water °c
Time mins
The temperature of the water decreases with time.As this is a curve shape you must also describe this
It falls quickly at first but then goes down at a slower rate
Try Describing these
Temperature c⁰
Number of bubbles produced by yeast in 1 min
Time s
Speed m/s
Explaining Graphs
• When you explain what a graph shows you are using your science knowledge to explain why the results show the pattern they do.
• There will usually be 2 or 3 marks for these questions
Temperature c⁰
Number of bubbles produced by yeast in 1 min
At lower temperature the number of bubbles increases BECAUSE THERE ARE MORE COLLISIONS BETWEEN THE YEAST AND THE SUGAR.
At higher temperature the number of bubbles goes downBECAUSE THE HIGH TEMPERATURE STARTS TO KILL THE YEAST
Distance of lamp from tube cm
Number of bubbles produce by pond weed in 1 min
The number of bubbles goes down steadilyA THERE IS LESS LIGHT ABSORBED BY THE POND WEED SO LESS PHOTOSYNTHESIS TAKS PLACE
Explain what these graphs show
Temperature of water c⁰
Time min Light Intensity lux
Number of bubbles produced by pond weed in 1 min