2. Observe Why would it
be difficult to sift the iron
filings from the sand?

It is difficult to sieve the iron

filings from the sand because iron filling and sand particles are of the same size. So this method of removal of iron fillings from the sand is not useful. For removing iron fillings from the sand particles, we use magnetic force for it. When a magnet is placed near the sand having iron filling, they attract the iron filling toward itself. So for this, magnets are the best.

depends where

on my head

yes

on my legs

yes

on my

arms

yesh

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive