Answer:
In my opinion testing with an experiment will be the most difficult when studying ancient creatures. You have to base off your research on fossils and might not be provided with accurate data depending on what your trying to prove or learn.
Explanation:
True, the hardness of all materials in relative <span />
I guess the the alignments of the atoms in the magnet are being demagnetized when it's dropped
Protons and neutrons are in the center
electrons orbit around the center/nucleus
Helium (He) has the lowest melting point of <span>-272.2 °C.</span>
