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Level 7

Unit 7


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ago
back in time from the present
amazing
extremely surprising
appear
to start to be seen or to be present
atmosphere
the mixture of gases around the earth
become
to start to be
even
used to show that something is surprising, unusual, unexpected, or extreme
gas
a substance in a form like air that is neither solid nor liquid
gravity
the force that attracts objects towards one another
in contrast
the opposition or dissimilarity of things that are compared
last
to continue in time; go on
necessary
needed in order for something else to happen
among
part of a group
invent
to create something that has never been made before
observe
to watch carefully in order to learn something
completely
as much as possible
discover
to find or learn something for the first time
reach
to arrive at a place, a level, or an amount
reflect
to send back from a surface
view
to look at or see something
size
how large or small something is