Factors affecting Rate of Photosynthesis Homework

The measurements shown in the table have been repeated three times.

Why should you repeat measurements?

Select two options.

• • to make it easier to spot anomalies

  • to test a different range of values for the independent variable

  • to be able to work out mean results

• • to make it easier to spot anomalies

  • to test a different range of values for the independent variable

  • to be able to work out mean results

• • to make it easier to spot anomalies

  • to test a different range of values for the independent variable

  • to be able to work out mean results

Calculate the mean number of bubbles of oxygen produced in 2 minutes when the distance was 10 cm.

Give your answer to the nearest whole number.

Which cell contains an anomalous result?

• A

• B

• C

A hazard is something that presents possible danger.

Identify one hazard in this investigation.

Which sketch graph correctly represents the pattern of the results in the table?

• A

• B

• C

Which of the following variables could you use to measure the rate of photosynthesis?

• • temperature

• • number of bubbles of oxygen produced in one minute

• • distance from the lamp to the pondweed

• • the piece of pondweed

What is the primary factor that affects the rate of photosynthesis in aquatic plants?

• light intensity

• water availability

• carbon dioxide concentration

• all of the above

Which of the following is a byproduct of photosynthesis?

• glucose

• oxygen

• carbon dioxide

• water

In which part of the plant does photosynthesis primarily occur?

• roots

• stems

• leaves

• flowers

A group of students realised that the water in the beaker cooled down. Suggest how the students could change their apparatus to prevent the water from cooling.