Scientists think that dolphins and whales may have evolved from a common ancestor. Fossils have been found showing how this organism slowing evolved into the seperate organism. These fossils are know as A.
Index Fossil

B.
Dervied Fossil

C.
Avada kedarva Fossil

D.
Transitional Fossil

What happens in a global convection cell

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?