For the first question, I would say a line graph. And the one about the human heart, I need some more information.
Answer:
The scientific mrthod is a process used by scientists to find answers to a question or to solve a problem. No there isn't just one because there are several versions of the scientific method. Some versions have more steps, while others may have only a few. Scientists can add steps, take out steps, revise, or make models.
Answer:
physical
Explanation:
science deals with physical things