Mr. smith challenged his students to create an electromagnet that will pick up more paper clips than anyone else in the class. timmy is very excited and begins to collect all of the necessary materials. he finds a d-cell battery, an iron nail, and a large roll of copper wire. what could timmy do, using just these materials, to increase the strength of his electromagnet to pick up the maximum amount of paper clips?

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

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.

Select the correct answer. what does the process of natural selection involve?