Jawless fish and ocean reefs were devastated by which extinction?

Late Devonian

Ordovician-Silurian

Permian-Triassic

End Triassic

Cretaceous-Tertiary

In which areas does the greatest amount of photosynthesis occur?

The region where warm and cold air masses meet

Geronimo wants to move an object 12 meters. Calculate the net work done by the object with an applied force of 150 N and a friction force of 37 N.

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Which term identifies the effects of the buildup of stationary electric charges on everyday objects caused by the transfer of electrons from one object to another? A. stationary electricity B. current electricity C. magnetic electricity D.

My Notes A basketball rolls across a classroom floor without slipping, with its center of mass moving at a certain speed. A block of ice of the same mass is set sliding across the floor with the same speed along a parallel line.

How does sound travel through waves?

Solve for real t: - 25=20t-5t^2

Contrast balanced and unbalanced forces.

A wave will travel only as long as it has energy