Biology RPA: Paper 2

What is used to test reaction time?

Where should the person being tested have the their hand, under or on top?

How do you make the ruler drop test a fair test for testing the impact of caffeine?

• Same person every time

• Same hand every time

• Same height of drop

• Calculate a mean and exclude anomalies

• Have everyone consume the same volume of caffeine

What else can be used to test reaction time?

• The bleep test

• Computer programs

• rock, paper, scissors

• Electrical stimulation

What is the independent variable in the plant growth experiments? 2 options

• Light

• Length of seedling

• Rate of photosynthesis

• Gravity

Name some control variables to the plant growth investigation

• Geotropism of each plant

• Number of seedlings in each dish

• Volume of water for each dish

• Temperature they are kept at

• Number of stomata on each leaf

How many seeds should go in each petri dish?

How often should you measure the height of each seedling?

What is used to measure the height of the seedlings?

What is needed to be ensured when placing quadrats?