Which of the following rocks would most likely be found on the ocean floor? granite basalt marble shale

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.