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Oak National Academy
12 questions
What is a sign that a chemical reaction is endothermic?
Why is it important to only change one independent variable at a time in an experiment?
What is the main reason for repeating an experiment several times?
In an experiment to determine how temperature affects the solubility of a salt in water, what is the dependent variable?
Hydrochloric acid and magnesium react to produce hydrogen gas. Identify the variable for an investigation to see how the mass of magnesium affects the volume of gas produced.
A ___ variable is any variable that is kept constant throughout the experiment to ensure that the test results are due solely to the change in the independent variable.
Which one of the following is a correct statement about combustion?
If the independent variable is the type of fuel, what would the dependent variable be in an experiment comparing energy transfer?
A ___ is a substance that releases its stored energy when it undergoes combustion. It's crucial for the process of energy transfer by heating.
Why is it important to use the same mass of fuel for each measurement when comparing the energy released by burning different fuels?
Order the following steps to correctly set up an experiment comparing the energy transferred by different fuels, starting with recording the starting mass of each fuel.
What role do control variables play in an experiment comparing the energy transferred by burning different fuels?
