Understanding CORMs in Biology

The video tutorial explains the CORMs question type in IGCSE biology, focusing on designing investigations. It breaks down the CORMs acronym: Change, Organism, Repeat, Measurement, and Same, providing a detailed analysis of each component using a sample question. The tutorial emphasizes the importance of structuring answers correctly to score full marks and encourages practicing with past papers.

What is the primary reason CORMs questions are crucial in the IGCSE biology paper?

• They focus on theoretical aspects of biology.

• They require understanding and structuring an investigation.

• They test practical knowledge of biology.

• They require memorization of facts.

In the CORMs framework, what does the 'C' stand for?

• Constant

• Concentration

• Change

• Control

What is the role of the 'O' in CORMs?

• To identify the organism and state a control for it.

• To measure the outcome of the experiment.

• To repeat the experiment multiple times.

• To change the variables in the experiment.

Why is repeating an experiment important in the CORMs framework?

• To confirm the reliability of the results.

• To measure different outcomes.

• To change the variables each time.

• To ensure the experiment is fair.

What does the first 'M' in CORMs refer to?

• Measurement of the control variable.

• Measurement of the dependent variable.

• Measurement of the constant variable.

• Measurement of the independent variable.

What is the significance of the second 'M' in CORMs?

• It refers to the measurement of concentration.

• It refers to the measurement of size.

• It refers to the measurement of temperature.

• It refers to the measurement of time duration.

What do the 'S' components in CORMs stand for?

• Speed of the reaction.

• Size of the sample used.

• Source of the materials.

• Same variables to ensure a fair test.

Why is it important to keep the temperature constant in an experiment?

• To ensure the plant receives enough light.

• To ensure the plant receives enough water.

• To prevent changes in enzyme activity affecting root growth.

• To maintain the pH level of the soil.

What could be a suitable control variable in a plant growth experiment?

• The type of soil used.

• The amount of sunlight received.

• The availability of water.

• The color of the plant.

What is a key strategy to master CORMs questions?

• Practicing past papers.

• Memorizing the textbook.

• Attending extra classes.

• Reading additional biology books.