A student is creating a flowchart of effective questions that compares and contrasts the characteristics of electromagnetic and mechanical waves. The student knows that the questions at the top of the flow chart will help distinguish waves that are electromagnetic from waves that are mechanical, as seen in the bottom of the flowchart.
Which direction are
Does the wave require
particles displaced in
a medium to travel?
IV
The evidence indicates this is The evidence indicates this is
The student knows that the following terms should appear in the spaces indicated by I, II, III, and IV.
Perpendicular, Parallel, Yes No
Select the correct matching of the terms to the numbered spaces.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

He sandals were out in the sun so the got hotter. which is why her feet felt hot.

B. elliptical. as in oval. 0 (==