What is an independent variable?, The thing you change in an investigation, The thing you measure in an investigation, The thing you keep the same in an investigation, A prediction about what will happen in the investigation, What is a dependent variable?, The thing you change in an investigation, The thing you measure in an investigation, The thing you keep the same in an investigation, A prediction about what will happen in the investigation, What is a control variable?, The thing you change in an investigation, The thing you measure in an investigation, The thing you keep the same in an investigation, A prediction about what will happen in the investigation, You are testing whether different types of trainers help you run faster. What is your independent variable?, The speed you run., The person running, The type of trainer, The thing you change, You are testing how the temperature of an acid affects the time it takes for metal to react with it. What is your dependent variable?, The temperature of the acid, The time taken for the metal to completely react, The mass of the metal, The concentration of the acid, You are testing how people's reaction times are affected by different volumes of music. What is your independent variable?, The reaction time, The volume of music, The test for reaction time, The age of the people doing the test, You are testing how temperature affects the reaction between sodium hydroxide and hydrochloric acid. Which of these is a control variable?, The concentration of sodium hydroxide, The volume of sodium hydroxide, The temperature of sodium hydroxide, The concentration of hydrochloric acid., You are testing how the steepness of a ramp affects the speed of a toy car going down it. What is your dependent variable?, The length of the ramp, The time the car takes to travel down it, The speed of different cars, The steepness of the ramp.

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