The definition of ________ is when plate boundaries shift suddenly and release their stored energy, which causes vibrations that shake and rattle the earth's surface.

  Thunderstorm
  Earthquake
  Tsunami

The _______ ________ is the changing of rock.

  rock cycle
  metamorphasis
  weathering

A _______ is a solid substance found naturally in the earth's surface.

  rock
  mineral
  piece of coal

Another group of mollusks called ___________, meaning "head footed" are very speedy

  gatsropods
  cephalopods
  spicules

The majority of gymnosperms are ________.

  cycads
  conifers
  spruces

The negatively charged _________ travel around the nucleus

  electrons
  protons
  neutrons

A ____ is the measurement of the amount of electrical push or force put in a circuit.

  battery
  ameper
  volt

A ______ is a neutron star that spins rapidly on its axis.

  nova
  pulsar
  variable star

The final part of the brain is called the _____ _____.

  brain cell
  brainend
  brain stem