Trials.
Methods, control, and variables aren’t the experiments themselves.
Answer:
Electromagnetic waves can travel through a vacuum, that is an empty space, whereas mechanical waves cannot. They need a medium to travel such as water or air. Ripples in a pond are an example of mechanical waves whereas electromagnetic waves include light and radio signals, which can travel through the vacuum of space.
Explanation:
Answer:
D
Explanation:
Its d I think tell me if it's wrong If it is I'm sorry