A group of students is investigating how salt dissolves in
water. They have three beakers, and each contains 100 mL
of water. The temperature of the water is 25°C in beaker 1,
50°C in beaker 2, and 75°C in beaker 3. They add 10 g of
salt to each beaker and stir. They continue adding salt and
stirring until no more salt will dissolve. They record the
final mass of salt that they added to each beaker.
Which variable is the responding variable?
A. The mass of salt
B. The volume of water
C. The water temperature
D. The time it takes the salt to dissolve
