SOund and Light waves

What are the two main types of waves that are generated in a thunderstorm? 

Which wave has a faster speed? Explain how you know using evidence from the text. 

You are executing an experiment to determine if the volume at which you play a sound impacts the amount of time it takes for the sound to reach a receiver 50 feet away. (Tip: Sound is measured in a unit called decibel)

What is Independent Variable?

You are executing an experiment to determine if the volume at which you play a sound impacts the amount of time it takes for the sound to reach a receiver 50 feet away. (Tip: Sound is measured in a unit called decibel)

What is Dependent Variable?

You are executing an experiment to determine if the volume at which you play a sound impacts the amount of time it takes for the sound to reach a receiver 50 feet away. (Tip: Sound is measured in a unit called decibel)

What units should we use to measure Iv and dv (they are different) Dependent ?

You execute the experiment and collect the data shown below. Based on this data, what is the relationship between the IV and the DV?

Based on your findings above, does the amplitude of a sound wave have any impact on the speed of that wave? Explain how you know. 

Compare and contrast mechanical waves and electromagnetic waves. In your answer give one similarity, one difference, and one example of each.  

Explain why we can see light in space but we cannot hear sound in space. Talk about both light and sound in your answer.  You must defend your answer to receive full credit.