Year 10 - Scientific Skills Quiz

A group of students set up an experiment shown in the diagram.

What is the dependent variable?

• The amount of light

• The amount of water

• The amount of growth

• The number of pots

A group of students set up an experiment shown in the diagram.

What is the independent variable?

• The amount of light

• The amount of water

• The amount of growth

• The number of pots

A group of students set up an experiment shown in the diagram.

What conclusion could be drawn from these results?

• The plant grows because of the light they are exposed to

• The plant growth was the highest when it received 7mL of water

• There were three pot plants used in this investigation

• Some types plants respond to water more than others

The graph shows the relationship between volume and pressure. How are the variables related?

• As the pressure increases, the volume also increases

• The pressure and volume both decrease at a constant rate

• As the pressure is increased, the volume decreases

• As the volume decreases, the pressure remains the same

Which graph correctly represents the data from the experiment in this table?

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A student wanted to test the idea that the performance of students in Science examinations would be worse if they did not eat breakfast.

Which of the following would be the dependent variable?

• The amount of students completing the Science examination

• The type of breakfast the students eat before the Science examination

• Questioning whether students eat breakfast or not before completing the Science examination

• The student results of the Science examination

This diagram depicts an experiment to determine the effect of sunlight on grass. For this to be a fair test, identify which of the following needs to be kept constant for each patch of grass.

• The amount of sunlight, the colour of grass and the amount of growth of the grass.

• The amount of water, the colour of shade cloth and the type of grass.

• The amount of water, the type of water and the type of grass.

• The amount of water, the type of wooden box and the amount of growth of the grass

Two students wanted to find out which substance is the best for keeping their cup of hot chocolate warm when they go to the snow. They set up an experiment where their cups were wrapped in different materials and the temperatures were recorded over a period of time. Identify the correct statement about this experiment.

• The amount of water and size of the cups would not have to be kept the same.

• The temperature is the independent variable that is being changed.

• The time is the dependent variable.

• The independent variable is the type of material around the cup.

A group of students were performing the following experiment to find out how fast different types of sugar dissolved in boiling water.

Equipment: cups, water, kettle, teaspoons, icing sugar, white sugar, brown sugar, sugar cubes, stopwatch

Method: Place boiling water in different cups

Add 1 teaspoon of sugar and start stopwatch

Stir until no more sugar crystals can be seen and stop timing.

Explain why this is not a fair test.

• The method is not a fair test because there are no variables used in the design.

• The method is a fair test because it uses the same amount of sugar each time, and timing is done carefully with a stopwatch.

• The method followed is not a fair test because it is not repeated a number of times and the amounts of each substance are not measured accurately.

• The method is a fair test because it is repeated with different types of sugar.

A student was investigating the solubility of gases in different samples of water. However, the teacher criticised the table shown in the diagram. Why would the teacher criticise this table?

• The experiment stopped at 40^oC.

• There are no units to identify what these results show.

• There are too many types of water being tested.

• The type of water being used is not clear.