DCSG Y8 Metals Summary Starter Quiz

Name the two different types of data

• qualitative and categoric
• numerical and categoric
• independent and dependent
• qualitative and quantitative

We use a bar graph when the data for our independent variable is …...

What is the dependent variable?

• A variable that we measure to see how it is affected by changes we make in the experiment.
• A variale that we keep constant to ensure a fair test.
• A variable that we choose to change and decide the values of.

On a graph the independent variable goes on the … axis?

What is the general word equation for when a metal reacts with water

• metal + water ---> metal hydroxide + oxygen
• metal + water ---> metal oxide + hydrogen
• metal + water ---> metal hydroxide + hydrogen
• metal + water ---> metal hydrate + salt

What is the best definition of a displacement reaction?

• A reaction where two elements combine to form a compound.
• A reaction where a more reactive element replaces a less reactive element in a compound
• A reaction where a compound breaks down into its constituent elements
• A reaction where two compounds exchange ions to form new compounds

How do we know if an experiment is reliable? Select all correct answers.

• An average value has been found.
• There are no anomalies in the data.
• The repeats for each data point will be similar.
• All control variables have been kept constant.
• The experiment was conducted safely.

Which of these metals is the highest in the reactivity series?

• Copper

• Iron

• Magnesium

• Potassium