
When lightning strikes, the bottom of the thunder cloud is negatively charged. Determine the direction in which the electrons will travel.

Important Questions on Interaction





A student wants to investigate the link between thunder and lightning. They design an experiment with a Van de Graaff generator. They plan to measure the loudness of the sound of the spark and compare it with the distance that the spark travels.
What is the dependent variable in this experiment

A student wants to investigate the link between thunder and lightning. They design an experiment with a Van de Graaff generator. They plan to measure the loudness of the sound of the spark and compare it with the distance that the spark travels.
Suggest one control variable for this experiment and justify the reason for your choice.

A student wants to investigate the link between thunder and lightning. They design an experiment with a Van de Graaff generator. They plan to measure the loudness of the sound of the spark and compare it with the distance that the spark travels.
Formulate a hypothesis experiment for this experiment. Explain the reasons for your hypothesis.
