Common Assesment Review

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Author:
jennx14
ID:
208789
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Common Assesment Review
Updated:
2013-03-21 23:38:44
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science
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Science
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  1. Mass
    Identify the unit of measurement and tool used
    measured in grams , triple beam balance
  2. liquid volume
     Identify the unit of measurement and tool used
    liters, graduated cylinder
  3. solid volume
    Identify the unit of measurement and tool used
    LxWxH cm3 , ruler
  4. temperature
    Identify the unit of measurement and tool used
    Celsius, thermometer
  5. Explain each part of the scientific method
    1. problem/question-what you are trying to figure out 

    2. Hypothesis- educated opinion 

    3. Experiment- must have control over independent and dependent 

    4. Data & Observation- must be detailed

    5. analysis- answer questions and gives support data

    6. conclusion- refers to hypothesis
  6. what's the purpose of having the control group and an experimental group?
    provides baseline for comparison
  7. Explain the independent and dependent variable.
    • dependent = cause
    • independent= effect
  8. What are the metric prefixes in order from smallest to largest?
    micro, milli, centi, deci, unit, deca, hector, kilo, hega
  9. define displacement
    distance from starting point - vector quantity
  10. Define equilibrium rule
    forces up = forces down
  11. define force
    push or pull causing change in motion - vector quantity
  12. define friction
    force against motion - applied
  13. define net force
    overall force on object
  14. define newton
    unit of force (1N= 1KgM/s2)
  15. define speed
    distance traveled in certain time
  16. define support force or normal force called
    opposes gravity
  17. define vector quantity
    • includes number and direction 
    • (velocity, acceleration, force, and displacement)
  18. define velocity
    speed with direction
  19. what does the phrase " frame of reference" refer to ?
    what you compare motion to
  20. What is your frame of reference for the following: 

    A. riding in a car
    B. in a spaceship orbiting the earth
    C. sitting on your couch watching tv
    A. ground,sidewalk, signs, etc.

    b. universe, space

    c. earth,stars, etc
    (this multiple choice question has been scrambled)
  21. In order to start an object in motion, what must you do ?
    overcome friction
  22. In order to keep an object moving  at a constant velocity (speed and direction), what must you do ?
    equal friction
  23. List the 4 forces we discussed. What direction do these forces act?
    • gravity(down toward center) 
    • support/Normal (up against gravity) 
    • applied (direction of motion)
    • friction (against motion)
  24. What is the formula for speed?
    s=d/t
  25. What are the units for distance, time, and speed?
    • d= mi,m, km, etc.
    • t= s, min, hr, etc.
    • s= mi/hr, m/s, etc.
  26. One the following Position(Distance) vs. Time graph

    a. what should the x axis be labeled?
    b. what should the y-axis be labeled?
    c. what would the magnitude (size) of the slope tell you ?
    • a. time
    • b. distance
    • c. speed
  27. If a car comes to a stop in 3 seconds from 60 miles per hour, what is the car's acceleration
    0-60mi/hr/3s

    = -20 mi/hr/s
  28. If an object has a net force other than zero, what is happening to the object?
    change speed and/or direction
  29. Is a car moving at a constant speed around a circular track accelerating? Why or why not?
    yes- changing direction
  30. What is the relationship between force and acceleration (assume that mass remains the same)? Give an example.
    direct: push boxes of same mass w/different force, more force= more acceleration
  31. What is the relationship between mass and acceleration( assume that force remains the same) Give an example.
    inverse: push more mass w/same force, will accel less
  32. What is newtons 2nd law
    • f=ma
    • f=net force
  33. What are the standard units of mass, force, and acceleration?
    • m=kg
    • F=N
    • A=m/s2
  34. What is the difference between mass and weight? Explain what the term losing "weight" really means.
    • mass=unaffected by gravity
    • weight= affected by gravity 
    • loose weight= loose mass
  35. What is Newton's 3rd law?
    every action has equal and opposite reaction
  36. When you push on a wall with a force of 5 N, what is the wall's response
    5N toward you
  37. If the force of a bat against the ball is the action force, what is the reaction?
    ball on bat
  38. If the ball pushing on the air is the action force, what is the reaction?
    air on ball
  39. Which experiences the greater force, a bug or the windshield it hits?? WHy??
    none- the same
  40. define law of universal gravitation
    F directly proportional to m1xm2) F inversely proportional to d2.
  41. define inverse square law
    F inversely proportional to d2
  42. define gravity
    F pulling toward center
  43. What is G?
    universal law of gravity constant
  44. What happens to the force of attraction between two objects . If the distance between them is decreased?
    decreased distance= increase force
  45. Which has more effect on the tides of the EARTH, THE SUN OR THE MOON? Why
    moon-closer
  46. Explain why you can never by truly weightless?
    Weight is a measure of F, F is always present (always have mass) so always have weight
  47. Explain why there will always be a force of attraction between two objects
    always mass!
  48. Explain why two objects dropped at the same time on Earth may not land at the same time, but those two objects will land at the same time if the experiment was performed on the moon.
    moon has no atmosphere, so no air resistance. More surface area= more affected by air resistance
  49. What is the value of acceleration due to gravity. What does this mean?
    • g=9.8m/s2
    • in free fall all objects on earth accelerates at 9.8m/s2

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