A group of students is investigating whether copper is a better thermal conductor than aluminum. The students take a copper wire and an aluminum wire of the same length and diameter. They put equal lengths of wax on one end of each wire and dip the other ends into of beaker of hot water. The length of wax left on the wires
after 10 minutes is shown.
Experimental Observations
Copper Aluminum
Original length of wax
2 cm
2 cm
Length of wax after 10 minutes 0.7 cm
1.2 cm
What was the independent variable in this experiment?

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box