Identify in each of the following experiments:
independent variable
dependent variable
constants-(controlled variables)
control experiment--highlight
repeated trials/sample size
leticia timed how fast five apple slices turned brown (oxidate) after being dipped in different preservatives such as lemon juice, fruit freshener, salt water, and lime soda. another part of the experiment had the apple slices simply set out without any chemical put on them. all parts of the experiment had the apple slices in the same indoor conditions such as humidity, temperature, and lighting; also only one variety of apple-red delicious was used. she repeated this experiment 10 times.