Question

they wondered if putting a tail on a kite would affect how well the kite flew. jackson flew a kite that did not have a tail for five minutes. then, he attached a four - foot - long tail and flew the kite for five more minutes. jackson repeated this with three similar kites, alternating whether he started the kite with or without a tail. during each flight, bonnie counted the number of times the kite crashed to the ground. in this experiment, which were part of an experimental group? the kites without tails the kites with tails

Explanation:

The experimental group is the group that receives the variable being tested (the tail, which is the factor hypothesized to affect kite flight). The control group is the one without the variable (no tail) for comparison.

Answer:

the kites with tails