There are some occasions when the moon's umbra doesn't even reach the earth. Can you explain why?

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump