Pls help me, not sure why my brain stopped working. all of it would be good, sorry about the lighting

Which of the following correctly describes the early view of catastrophism?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter