science ch 4

  1. ability to do work and change matter
  2. SI unit for energy
    joule (J)
  3. Light =
    Radiant energy
  4. energy from motion or forces that affect a whole object
    Mechanical energy
  5. equation that states the relationship between matter
    E = mc²
  6. energy of a entire object moving
    kinetic energy (whole-body kinetic energy)
  7. four factors that affect rotational kinetic energy
    • size of an object
    • an objects shape
    • speed
    • mass
  8. energy associated with the position of a object and the forces upon the object
    potential energy
  9. Four fundamental forces
    • Gravitational force
    • weak Nuclear force
    • electromagnetic force
    • strong nuclear force
  10. an attractive force between all material objects
    gravitational force
  11. affects certain subatomic particles
    weak nuclear force
  12. electricity and magnetism are two different manifestations of the
    electromagnetic force
  13. strongest fundamental force acts only within the nuclei of atoms
    strong nuclear force
  14. internal energy of an object due to the random motions of its individual molecules
    thermal energy
  15. 3 factors effecting thermal energy
    • temperature
    • state
    • mass
  16. transfer o thermal energy from an object of higher temperature to an object of lower temperature
  17. amount of heat needed to change its temperature by a certain amount
    hat capacity
  18. what does Δ mean
  19. device designed to measure the heat involved in physical and chemical changes
  20. three ways heat is transferred
    • conduction
    • convection
    • radiation
  21. device that automatically regulates temperature
  22. transfer of heat between objects in direct contact
  23. name for the amount of disorder in a system
  24. what is the amount of heat required to change a given amount of liquid already at its boiling point into a gas without a change in temperature
    heat of vaporization
  25. formula for melting point
  26. liquids that evaporate quickly
  27. nonvolatile solutes raise the boiling temperature
    boiling point elevation
  28. the pressure that must be exerted by the vapor the vapor an liquid to be in equilibrium at a given temperature
    vapor pressure
  29. energy gained or lost by a systems equal to the energy lost or gained by its surroundings
    First law of Thermodynamics
  30. when the liquid state is skipped and the substance changes directly into gas
  31. state of matter in which atoms break down into charged particles
Card Set
science ch 4
A Beka