carbon dioxide, or any gas that traps heat in the atmosphere
greenhouse gas
the effect or influence one thing has on another
impact
having firm, strong muscles or relating to muscles
muscular
return to an original form or situation
change back
how many days does it take for the earth to orbit the sun?
365
capable of being decomposed by bacteria or living things
biodegradable
save or redeem something for continued use
salvage
unwanted by-product that is left over and no longer needed after the completion of a process
waste
transport someone or something to a specific spot; deposit
drop off
Cherry blossom
natural fuels such as coal, oil or gas formed over many years from the remains of living organism
fossil fuels
causing discomfort or anxiety
unsettling
when you see something rare or unusual
sighting
begin to accept or understand a situation
sink in
Until 1923, what was the Turkish city of Istanbul called?
Constantinople
very excited and pleased
thrilled
a situation in which all movement or activity has stopped
standstill
not definite or certain because it may change later
tentative
be likely to happen soon - usually referring to a worrying or unpleasant event
loom ahead
How many stripes are on the US flag?
13
land that is not level or smooth and has rocks instead of plants and trees
rugged
difficult to find, define or achieve
elusive
a problem or difficulty that cannot be solved or dealt with
insurmountable
choose a course of action, often a desperate measure
resort to
What country has the most islands?
Sweden