Question

that describes revising the hypothesis. hint: to revise the hypothesis, you use the results of the investigation to come up with a new explanation. a motorized toy boat moving across a pond lester took his motorized toy boat to the park with his cousin. the boat zipped across the pond, and lester wondered if adding mass to the boat would affect its speed. he didnt think so, since the motor should keep propelling it at the same rate. lester decided to time the boat as it traveled from one side of the pond to the other. he then taped a pebble to the boat and timed it again. finally, he added a second pebble and repeated the procedure. lester noticed that as he added mass, the trips took longer. the empty boat took the least time to cross the pond, and the boat with two rocks took the longest. lester concluded that adding mass does slow down the boat. he changed his prediction: the motor must provide a set amount of force, so it cant maintain the same speed as more mass is added. he shared his results with his aunt and confirmed that the boats motor exerts a consistent force, so increasing the boats mass reduces its acceleration.

Explanation:

Lester conducted an experiment on a motor - ized toy boat to test the effect of added mass on its speed. He initially hypothesized that adding mass would not affect speed. After collecting data by timing the boat with different masses, he revised his hypothesis based on the results, realizing that more mass slows the boat down as the motor has a set force. This follows the scientific method of using investigation results to revise a hypothesis.

Answer:

Lester used the results of his investigation (timing the boat with different masses) to come up with a new explanation (that the motor has a set force and adding mass reduces acceleration), which is revising the hypothesis.