What kind of waves can travel through both matter and empty space? and why?

1. radio waves
2. seismic waves
3. sound waves
4. surface waves

is for tomorrow ; (

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

Do you think humans have a moral obligation to preserve the habitat of the chimpanzee