Practical Investigation Quiz

Why is it important to control independent and dependent variables in an experiment?

• To ensure the experiment is fun

• To make the experiment more complex

• To ensure experimental results are valid

• To increase the number of variables

What should be done when it is hard to control all variables in an experiment?

• Use a smaller sample size

• Ignore the variables

• Use a larger sample size or a study control group

• Change the hypothesis

What is the importance of choosing suitable apparatus for experiments?

• To make the experiment look impressive

• To carry out experiments accurately and safely

• To increase the cost of the experiment

• To reduce the time taken for the experiment

What is the role of drawing conclusions in scientific experiments?

• To create new variables

• To be consistent with evidence and support with scientific explanations

• To ignore the evidence

• To make the experiment longer

What should be suggested to improve an investigation?

• Ways to make the experiment more complex

• Ways to obtain extra evidence to allow a conclusion to be made

• Ways to reduce the number of variables

• Ways to make the experiment more expensive

What should be done if evidence obtained does not allow a conclusion to be made with confidence?

• Ignore the evidence

• Evaluate the methods and suggest improvements

• Change the hypothesis

• Repeat the experiment without changes

What are anomalous results?

• Results that fit the pattern

• Values that do not fit the pattern

• Consistent measurements

• Expected outcomes

What is a prediction in scientific terms?

• A proposal to explain facts

• A statement suggesting future events

• The smallest change in quantity

• The total number of repeated measurements

What is risk in scientific investigations?

• The sum of all measurements

• The probability that a hazard will cause harm

• The smallest change in quantity

• The maximum and minimum values

What is the true value in an experiment?

• The average value obtained

• The value obtained in an ideal experiment

• The highest value recorded

• The lowest value recorded