Cast iron is more brittle than pure iron
They fly into tree sap,then they soffocate in the sap,finnaly the saph
Carbon dioxide is a main greenhouse gas, found in car exhaust pipes. Methane and nitrous oxide is another type of greenhouse gas. Oxygen is the only clean gas out there because we need it to survive. Therefore, the only gas that is not a greenhouse gas is (c) oxygen.
Boyle's Law deals with pressure and volume: P1V1 = P2V2 where pressure and volume will have an inverse relationship