Working Scientifically 1

What is the definition of an independent variable?

• The variable which is changed in an investigation.

• The variable which is measured in an investigation.

• The variable which stays the same in an investigation.

What is the definition of a control variable?

• The variable which is changed in an investigation.

• The variable which is measured in an investigation.

• The variable which stays the same in an investigation.

Which of these is the correct description of repeatable results?

• A different experimenter repeats the investigation using the same method and same equipment, and obtains the same results.

• The original experimenter repeats the investigation using the same method and equipment and obtains the same or precise results.

• A different experimenter repeats the investigation using the same method but different equipment, and obtains the same results.

• The original experimenter repeats the investigation using a different method and obtains the same results.

Which of these is the correct description of reproducible results?

• A different experimenter repeats the investigation using the same method and same equipment, and obtains the same results.

• The original experimenter repeats the investigation using the same method and equipment and obtains the same or precise results.

• A different experimenter repeats the investigation using the same method but different equipment, and obtains the same results.

• The original experimenter repeats the investigation using a different method and obtains the same results.

Which of these is the correct conversion from kg to g.

• Multiply by 10

• Multiply by 1000

• Divide by 10

• Divide by 1000

Which piece of equipment would you use to precisely measure a volume of 20cm³ hydrochloric acid?

• A pipette

• A 100cm³ beaker

• A measuring cylinder

Which of these is the correct conversion from cm³ to dm³?

• Multiply by 10

• Multiply by 1000

• Divide by 10

• Divide by 1000

Calculate the mean of these results: 55cm, 53cm, 52cm, 32cm, 54cm (round your answer to 1dp).

• 49

• 50

• 53

• 54