# Principles of Science Chapter 1 -3

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 Author: Hattieshouse ID: 215226 Filename: Principles of Science Chapter 1 -3 Updated: 2013-04-23 15:26:32 Tags: Science Folders: Description: Clark County School District Freshman Science Show Answers:

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1. What's Newton's first law of motion?
Objects moving at a Constant velocity keeps moving unless an unbalanced net force acts on it
2. net force
A Combination of forces Acting on an object.
3. inertia
The tendency of an object to resist a change in motion
4. force
Push or pull on an object
5. balanced force
Equal but opposite forces acting on an object
6. negative acceleration
The acceleration of an object that is slowing down
7. Positive acceleration
The acceleration of an object that is Speeding up
8. Acceleration
The rate of Change in velocity
9. Graph
A visual display of Information or data
10. Velocity
A measure of speed Of an object and the direction it is traveling
11. Speed
The distance an object travels in an amount Of time
12. Instantaneous speed
the speed of an object at one point in time
13. distance
A measure of how far an object has moved
14. displacement
the distance and direction that something moved from a starting point
15. Average speed
the total distance traveled in a unit of time
16. The formula for density

•                       mass
• density=  --------------------
•                     volume
17. V = l x w x h
The formula for volume

volume = length x width x height
18. nano-
The SI prefix for one billionth

(0.000 000 001)
19. micro-
The SI prefix for one millionth

(0.000 001)
20. milli-
The SI prefix for one thousandth

(0.0001)
21. centi-
The SI prefix for one hundredth

(0.01)
22. deci-
The SI prefix for one tenth

(0.1)
23. kilo-
The SI prefix for one thousand

(1,000)
24. What is SI
The International System of Units, which is based on multiples of ten
25. Candela
The SI measure for the intensity of light

symbol  (cd)
26. Mole
The SI measure for amount of substance

symbol      (mol)
27. Kelvin
The SI measure for temperature

sysmbol   (K)
28. Ampere
The SI measure for electric current

symbol     (A)
29. Meter
The SI measure for length and/or distance

symbol     (m)
30. Kilogram
The SI measure for mass

symbol    (kg)
31. second
The SI measure for time

symbol      (s)
32. The formula for speed

•
•                 distance
• speed =  -----------------------
•                 time
33. What is the formula to calsulate average speed?
• The formulas is:
•                         total distance
• average speed= --------------                         total time
34. The fomula for acceleration

•                      change in velocity
• acceleration = ------------------
•                             time
35. What is the formula to calculate change in velocity?
The formula is:

• change
•     in     =  final     -    initial
• velocity    velocity      velocity
36. What are the SI base units of measure?
• meter
• kilogram
• second
• kelvin
• mole
• candela
37. standard
An exact quanity that people agree to use to compare mesurements
38. Earth Science
The investigation of earth and space.
39. Physical sciense
Thy study of energy and matter that is scientific in nature
40. Life Science
The study of living things
41. What are the three main categories of science?
• Life science
• Earth science
• Physical sciense
42. technology
The application of science to help people
43. scientific law
A statement about what happens in nature that seems true all the time
44. Model
Anything that represents an idea, event or object to improve understanding
45. bias
What is expected cjanges how results are viewed
46. Hypothesis
An explanation for a question or problem based on what you know and observe.
47. mass
the measrement of the quantity of matter in a object
48. density
The mass per unit volume of material
49. experiment
50. An investigation that tests a hypothesis by collecting information under controlled conditions
51. What are the stpes of the scientific method?
• State the problem
• Gather Information
• From Hypothesis
• Test Hypothesis
• Analyze Data

• Hypothesis   or    Hypothesis
•     not                 supported
• supported
52. Scientific Method
The steps a scientist follows when preforming an investigation
53. Control
A standard in an experiment against which results are compared
54. Constant
A condition in an experiment that dose not change
55. Independent Variable
In an experiment, the condition that is tested
56. Dependent Variable
The condition in an experiment that results from the changes made to the independent variable
57. Variable
A quantity that can have more that one value
58. Scientia
The latin word for knowledge
59. List the three way velocity can change.
• change in direction
• change in speed
• change in motion
60. What is Newton's second law of motion?
The net force acting on an object causes the object to accelerate in the direction of the net force.
61. Terminal velocity
The highest speed a falling objest can reach
62. Friction
A force that opposes the slliding motion of two srufaces that a are touching each other
63. Air resistance
A force that opposes the movement of objects through air
64. Sliding friction
the force that opposes the motion of two surfaces sliding past each other
65. Static friction
the force that keeps two surfaces at rest from sliding over each other
66. What is the formula to find acceleration when force and mass are known?
•                          net force
• acceleration = --------------
•                            mass
67. What is the fromula to find force when mass in know?

net force = mass x acceleration
68. Gravity
An attractive force between two objects
69. What is the law of Universal Gravitation?
Allow us to find the force of gravity beween any two objects if their masses ans the distance beween them are known.

70. Weight
The gravitational force exerted on an object
71. Centripetal acceleration
Acceleration toward the center of a curved path.
72. Centripetal force
The net force exerted toward the center of a curved path
73. What is Newton's third law of motion?
To every action force ther is an equal and opposite reaction force.
74. momentum
the product of a moving object's mass and velocity
75. What is the fromula for momentum?

momentum = mass x velocity

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