Control and purpose

Control and purpose

Multiple Choice

• it acts as a control, to compare and confirm that any change in the volume of water is solely due to the number of leaves of the plant

• it acts as a control, to compare and confirm that any change in the volume of water is solely due to the plsnt

• it acts as a control, to compare and confirm that any change in the volume of water left in the beakers is solely due to the number of leaves of the plant

• it acts as a control, to compare and confirm that any change in the volume of water left in the beakers is solely due to plant absorbing water through their roots.

Multiple Choice

• Set-up C acts as a control set-up to compare and confirm that any change in the amount of light is solely due to the materials.

• Set-up C acts as a control set-up to compare and confirm that any change in the amount of light is solely due to the light passing through the materials.

• Set-up C acts as a control set-up to compare and confirm that any change in the amount of light detected by the light sensor is solely due to the materials.

• Set-up C acts as a control set-up to compare and confirm that any change in the amount of light detected by the light sensor is solely due to the light passing through the materials.

Multiple Choice

• To ensure that the data-logger records the results accurately.

• To ensure that light from the laser does not reach the light sensor.

• To ensure that light from surroundings does not reach the light sensor.

• To ensure that light from the laser is reflected into the light sensor accurately.

Multiple Choice

• This prevents the amount of roots from affecting the number of leaves of the plant.

• This prevents the number of leaves from affecting the amount of roots of the plant.

• This prevents the amount of roots from affecting the volume of water absorbed by the plant.

• This prevents the number of leaves from affecting the volume of water absorbed by the plant.