# Physical Science 1

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 Author: constance.siegel ID: 226821 Filename: Physical Science 1 Updated: 2013-07-13 11:32:41 Tags: Physical Science Folders: Description: Physical Science 1 Show Answers:

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1. Data
Measurement information that can be used to describe objects, conditions, events, or changes.
2. Referent
Vague References. You refer to, or think of, a given property in terms of a more familiar object.
3. Tools
What you can hold, or observations (patterns)
4. Objects
Things that can be seen or touched
5. SI
Standard International
6. What do each of these measure?
Meter
Kilogram
Kelvin
Second
Ampere
Mole
Candela
• Meter: length
• Kilogram: mass
• Kelvin: temperature
• Second: time
• Ampere: current
• Mole: amount of a substance
• Candela: luminosité
7. Metric system is based on the # ___
10
8. A cube only measures ___ side, but you can determine ____ & _____.
• 1 side
• Area
• Volume
9. is density based on quantity?
No
10. The bigger the density, the more ____
mass
11. As mass increases, so does _____
Density
12. As density increases, so does ___
Mass
13. T/F
If you cut a block of platinum in half it's density decreases?
False, density never changes
14. What the the symbol for density?
P = density
15. Math terms:
Direct
Inverse
Proportionality
Numerical
• Direct: when 1 thing changes another changes in the same direction.
• Inverse: One goes up, one goes down
• Proportionality: How many liters of gas per hour
• Numerical: Number that is constant i.e.: Pi
16. Before science & experiments it was all ____
Thinking
17. Condensed scientific method
• Collecting observations
• Developing explanations
• Testing explanations
18. Hypothesis
tentative explanation for some observation
19. Experiment
recreation of an event or occurrence to test a hypothesis
20. Controlled experiment
• Fixed set for comparison.
• The best because you know which factors influence.
21. Pseudoscience
False Science
22. T/F
Principles are more specific than laws
True
23. T/F Theory has lots of validity & are rarely overturned
True
24. A model is useful in what 2 instances?
When something is too small, or too big, to be seen
25. What is the formula for slope?
• Y1 - Y1
• ______

X1 - X2
26. ___ ____ is required for any change in a state of motion.
Net force
27. Friction
When one thing goes over another
28. Motion
Change in position, explaining how change comes about & being able to apply it
29. Are speed & velocity the same thing?
No
30. What are the 3 basic concepts of motion?
• Position
• Speed & Velocity (not the same thing)
• Acceleration
31. What do Newton's laws of gravitation do?
Govern movement of all particles.
32. To measure motion you must have what 2 things?
• Change in position
• Change in time
33. What are 3 important combinations of legnth & time (needed for motion)?
• Speed
• Velocity
• Acceleration
34. What is the formula for speed?
35. Vector shoes _____ & ______
• Direction
• Magnitude
36. The ____ the arrow, the longer the magnitude
arrow
37. Arrows symbolize ______
Magnitude
38. Speed can stay the same, but you accelerate if you ___ ____
change directions
39. T/F Stopping is acceleration
• True
• It is negative acceleration
40. symbol for "final" and symbol for "initial"
• Final: f
• Initial: i
41. What is the formula for average velocity?

• (the v has a line over it)
• f means: final
• I means: initial
42. Who were the first 2 people to experiment?
Galileo & Newton
43. The direction you are moving is = ____ ____
• Think tug of war
44. If there is movement, there is a a ___ ___ of ___
Net Movement of Change
45. What are the 4 fundamental forces?
• Gravitational
• Electromagnetic
• Weak force
• Strong force
46. The ____ from an object the less gravitational pull it feels, and vise versa.
further
47. Inertia
Measure of an object's tendency to resist changes in its motion (including rest)
48. The more ___, the more inerta
mass
49. In space you must ____ force or you would never move.
accelerate
50. The longer something falls, the ____ __ ___. What causes this?
• Faster it goes
• Due to gravity
51. Terminal Velocity
When you reach a set point where gravity & airflow (velocity) balance, & you can't go any faster unless you change body shape.
52. Acceleration is the same for all objects when?
In the absence of air
53. Aerodynamics
How air impacts you
54. What is the formula for distance?
What does each symbol mean?
• d = distance
• a = acceleration
• t = time
55. What is the symbol for the force of gravity?
g
56. What are the 3 types of motion?
• Vertical motion
• Horizontal motion
• Combination of vertical & horizontal (think football arch)
57. Projectile Motion
Any motion not restricted to the ground. It's shooting through the air.
58. The longer the vector, the ____ it goes
faster
59. If you fire, or drop an arrow which hit the ground first?
They will hit at the same time
60. What are Newton's 3 laws of Motion?
• The law of inertia: object will not change it's motion unless acted on by something else (unbalanced force)
• 2nd Force causes accelerations: more force, more acceleration.
• 3rd Relates forces between objects: whenever 2 objects interact, the force exerted on one object is equal in size & opposite in direction to the force exerted on the other object.
61. Formula for Newton's 2nd law of motion?
What do the symbols mean?
• force = mass x acceleration
• (newton) = kg x meters per second2
62. If ___ goes up, force & acceleration go down, and vice versa
mass
63. ____ is the measurement of inertia (how much of you there is).
____ is the gravitational pull on your mass.
• Mass
• Weight
64. What is the difference between mass & weight?
Mass is how much of you there is, while weight is the gravitational pull on your mass
65. Formula for momentum
p = mv

(Density = mass x velocity)
66. Why does a tennis ball hit the ground harder than a paper ball?
Because the more mass, the more momentum.
67. ______ is transformed though working or heating.
Engery
68. In energy is anything created, or destroyed?
No
69. What are the manifestations of energy?
• work
• motion
• position
• heat chemical & nuclear energy
• mass itself
70. Physics/work has to do with the _____ & the _____ to which you apply force.
• force
• distance
71. What is the formula for work?
• W=Fd
• work = force x distance
• Broken down further it is:
• work = mass x acceleration x distance
• Metric:
• Newton x Meter
72. In Newton:
What is the formula for Joule?
What does "Joule" stand for?
• Newton x meter = Joule
• Joule: mechanical energy
73. Mathematically speaking: If you carry a box up and down a stair has any work been done? Why or why not?
• No
• Because you are not changing distance
74. What is the simple distance formula?
Findin=Foutdout
75. Define Power
• Rate at which you work
• OR
• Rate at which energy is transformed
76. Formula for Power
P = W/t
77. The smaller the time, the ____ power.
The more work (Faster), the ____ power.
• More Power
• More Power
78. In horse power: the _____ the number, the faster you can go.
Bigger (Think cars)
79. Which would have more power:

Walking or running a mile?
Which does more work?
Running does more power & more work
80. Movement is ____ _____
Kinetic Energy
81. What is "energy"?
What is "work"?
• Energy: the ability to do work
• Work: process of changing the energy level
82. Potential Energy is the Energy of _____
Position
83. Kinetic Energy can be changed into _____ Energy
Potential
84. Which is more important?
Velocity or Mass?
Velocity
85. When stopping a car, kinetic energy increases by _____
4
86. The more distance you cover, the more _____ ____ ___.
work you do
87. When you have full _____ energy you have zero ________ energy.
And Vice Versa
Full Kinetic Energy you have no Potential Energy, and vice versa
88. Is nuclear energy a chemical reaction?
• NO
• Involves splitting an atom
89. What forms of energy can you convert to another form of energy?
All forms of energy can be converted to another form of energy
90. What are the 5 forms of energy?
• Mechanical Energy: Kinetic plus Potential
• Electrical Energy: Charges, currents, etc.
• Chemical Energy: chemical reactions
• Radiant Energy: Electromagnetic energy, visible light
• Nuclear energy: Involving the nucleus & nuclear reactions.
91. T/F When swinging a pendulum, it never stops moving?
• False
• For a split second it does not move.
92. A pendulum is an example of what 2 types of energy?
• Kinetic
• Potential
93. Most of our energy, up to _____% can be traced to ___________?
• 89%
• Photosynthesis
94. Petroleum comes from __ ____ ___
95. Coal is
Compacted plant material
96. Why will we eventually run out of water?
Because, while it is renewable, it easily escapes the atmosphere
97. What are the 2 types of solar technologies and explain.
• Passive: use solar energy flow naturally. DIrect conversion of light to electricity
• Active: solar collector use to heat water, air, or some liquid. Mirrors focus to heat water for steam generation.
98. What is an example of Geothermal Energy?
Old Faithful
99. Hydrogen is a biproduct of _____, turns back into _____, but is hard to split.
from water, to water, hard to split water

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