P5 Process skills 1

What is the independent variable?

• The results of the experiment.

• The one variable that is changed in the experiment.

• The variables that we keep constant in an experiment.

What is the dependent variable?

• The variable being measured in an experiment.

• The variable that is kept constant in an experiment.

• The variable that you decide to change in an experiment.

Why is there a need for a control set-up?

• It is used as a basis of comparison.

• It is used to repeat the experiment and check the results.

• It is used to show all the controlled variables.

• To confirm that the independent variable is affected by the dependent variable.

Max wants to find out if water or ink evaporates faster. Is this a fair test?

• Yes

• No

• To find out how the number of weights added affects the type of bag.

• To find out how the type of bag affect the number of weights added.

• To find out which type of bag is the strongest.

• To find out if the weights can break a bag.

Which set-ups should be used to find out how the exposed surface area of the water affects the rate of evaporation of water?

• A and B

• A and D

• B and E

• C and E

A conclusion should NOT be written as a/an ___________.

• relationship

• aim

• ranking

Which of the following is NOT a possible hypothesis?

• To find out how the temperature affect the rate of evaporation of water.

• As the number of bulbs in series increases, the brightness of the bulb decreases.

• Substance X causes the plant to grow faster.

• Material P is more flexible than material Q.

What does it mean when the results are reliable?

• The results are constant.

• The results are consistent.

• The experiment is repeated.

• The results are accurate

What does 'accurate results' mean?

• The results are always the same.

• There is only one changed variable.

• The dependent variable.

• The results are close to the correct value.