AQA GCSE · Question 10.1 · Energy changes

This question is about temperature changes. A student investigated the change in temperature of a solution when different masses of ammonium nitrate were dissolved in water.
<br/><br/>
This is the method used.
<br/><br/>

1. Measure 200 cm3 of water into a polystyrene cup.
   <br/><br/>

2. Measure the temperature of the water.
   <br/><br/>

3. Add 4.0 g of ammonium nitrate to the water.
   <br/><br/>

4. Stir the solution until all the ammonium nitrate has dissolved.
   <br/><br/>

5. Measure the lowest temperature reached by the solution.
   <br/><br/>

6. Repeat steps 1 to 5 with different masses of ammonium nitrate.
   <br/><br/>

Give the independent variable and the dependent variable in the investigation.
<br/><br/>
Independent variable: ____________
<br/><br/>
Dependent variable: ______________