Magnetic reversals have helped to support a.
the theory of Pangaea.
c.
sea-floor spreading.
b.
the age of the Earth.
d.
the theory of Gondwana.

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false