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?

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

it is the most commonly accepted one

the correct answer to this question is 2