Which best describes what is required for any sound wave to travel?

When an accurate experiment is repeated by another scientist, the results A) should be similar to those obtained originally. B) will be identical every time the experiment is repeated. C) should be completely different for a different scientist.

Describe renewable resources as it applies to: water, forests and fish.

What should we do to prevent landslide

Why do rocks on the ocean floor form a pattern of magnetized stripes?

What is the definition of gravity? a force that repels or pushes objects with mass away from each other a force that causes objects to fall toward the strongest magnetic field a force that attracts or pulls objects with mass toward each other mass

According to this species-area curve for reptiles and amphibians on a west indian archipelago, a 50% decrease in area will change the number of species living in the remaining area by

How do organelles interact within a cell

How do we detect the energy of a wavelength?

How energy in gasoline is transformed in a lawn mower

Which observation was a sign that a chemical reaction was occurring in this experiment A) formation of a solid B) change in color C) formation of gas bubbles D) production of light