Which of the following best describes the kinetic theory? A. Energy is conserved when converted to another type of energy.
B. Atoms and molecules are always moving or vibrating.
C. Electron pairs move apart to form more stable molecules.
D. Atoms rearrange in molecules to form new compounds.

The excretory system, need answers for all: )

The sum of the oxidation numbers in a neutral compound is always

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