Describing Graphs
Investigations
1. An investigation to find out how concentration affects the rate of diffusion.
Description – straight line graph that goes through the origin.
2. An investigation to find out the number of slotted masses needed to move a block changes as the
weight on top of the block increases.
Description – The line starts part way up the y axis and is a straight line graph with a steady increase.
3. An investigation to find out how the volume of gas produced changes over time.
Description – The line goes through the origin. This is a curved line with an initially rapid increase that
slows down until it plateaus/is at a constant level.
4. An investigation to find out how atmospheric pressure changes with height.
Description – The line starts at the top of the y axis and is a curve downwards. The value for the y axis
decreases less as the value for the x axis increases.
5. An investigation to find out how enzyme activity is affected by temperature.
Description – The line starts at the origin. It increases at an initially shallow gradient and then a much
steeper gradient. It then peaks and decreases rapidly. It then decreases steadily until it plateaus near
the bottom of the y axis.
6. An investigation to find out how heart rate changes during and after exercise over time.
Description – The line starts part way up the y axis. The line then gradually increases and reaches a
peak before it plateaus near the top of the graph. It then declines steadily and returns to the original
height on the y axis.
visit twinkl.com
Answers
1. Independent variable – concentration.
Rate of diffusion
Dependent variable – rate of diffusion.
Concentration
2. Independent variable – weight on top of the block.
Number of slotted masses needed
Dependent variable - number of slotted masses needed.
Weight on top of a block
Page 1 of 3
visit twinkl.com
3. Independent variable – time.
Volume of gas
Dependent variable – volume of gas produced.
Time
4. Independent variable – height.
Atmospheric pressure
Dependent variable – atmospheric pressure.
Height
Page 2 of 3
visit twinkl.com
5. Independent variable – temperature.
Enzyme activity
Dependent variable – enzyme activity.
Temperature
6. Independent variable – time.
Heart rate
Dependent variable – heart rate.
Time
Page 3 of 3
visit twinkl.com