sam science

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sam science
2010-11-13 18:47:11

science comp review
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  1. educated quess using what you know and what you observe
  2. amount of space occupied by an object
  3. push or pull that one body exerts on another
  4. force that opposes motion between two touching surfaces
  5. states that any two masses exert an attractive force on eachother, the amount of which depends on the mass of the two objects and the distance between them
    law of gravitation
  6. organized procedure for testing a hypothesis that tests the effect of one thing on another under controlled conditions
  7. distance an object travels per unit of time
  8. sum of the forces that are acting on an object
    net force
  9. acceleration of an object toward the center of a curved or circular path
    centripetal acceleration
  10. speed of an object at a given point in time, different depending on when it is measured
    instantaneous speed
  11. factor that can cause a change in the result of an experiment
  12. speed of an object and the direction it travels
  13. forces on a body that are equal in size and oppostie in direction and do not change the motion of the body
    balanced force
  14. a force directed toward the center of the circle for an object moving in circular motion
    centripetal force
  15. property that a moving object has because of its mass and velocity
  16. in an experiment, a variable that does not change when other variables change
  17. rate of change of velocity, which occurs if an object speeds up, changes direction, or slows down
  18. resistance of an object to a change in its motion
  19. gravitational force exerted on an object by earth
  20. total distance that an object travels divided by the total time it takes to travel that distance
    average speed
  21. formula to convert celsius to kelvin
    c + 273
  22. formula to convert kelvin to celsius
    k - 273
  23. formula to find momentum (p)
    p= mv
  24. formula to find velocity
    v= p/m
  25. formula to convert L to mL
    L x 1,000
  26. formula to convert mL to L
    mL / 1,000
  27. formula to find speed
    s= d/t
  28. formula to find acceleration
    • a= (Vf - Vi) / t
  29. formula to find force
    • f= ma
    • a= f /m
  30. an object moving at a constant velocity keeps moving at that velocity until a net force acts on it
    newton's first law of motion
  31. the net force acting on an object causes the object to accelerate in the direction of the net force
    newton's second law of motion
  32. when one object exerts a force on a second object, the second one exerts a force on the first that is equal in size and opposite in direction (to every action force there is an equal and oppostie reaction force)
    newton's third law of motion