Select the statements that correctly describe how a barometer measures pressure. a. Pressure exerted by the atmosphere is equal to pressure exerted by the column of mercury.
b. The pressure exerted by an enclosed gas is equal to the height difference of a column of mercury in a U-tube.
c. A column of mercury inverted in a dish of mercury measures pressure exerted on the open surface of the mercury.
d. The diaphragm changes shape in response to exerted pressure.

Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite