Can you identify the independent, dependent, control variables & two constants?

Since Peter learned that Venus Flytraps typically grow best in warmer/milder climates, he wondered if cooler temperatures would impact how quickly they closed. Therefore, he designed and conducted an experiment. For his experiment, he purchased sixteen Venus Flytraps from a local florist that sold exotic plants. He then placed eight Venus Flytraps outside during the early part of winter (Temperature = 6.9 oC) and eight Venus Flytraps inside his house (Temperature = 22.2 oC). After allowing the Venus Flytraps to adjust to their environment for a day, Peter began his experiment. Peter used a small dowel (wooden stick) to activate the Venus Flytraps by touching their “trigger hairs.” Once he did this he used a stopwatch to determine how many seconds it would take to completely close. He repeated this process for all Venus Flytraps (both inside and outside) and the data he recorded are in tables below.