to watch carefully in order to learn something
reflect
thought of and made something new
needed in order for something else to happen
part of a group
invented
how large or small something is
size
reach
observe
learned about or became aware of something
among
to send back from a surface
completely
to arrive at a place, a level, or an amount
to look at or see something
necessary
as much as possible, one hundred percent
view
discovered