Physical Science Midterm Flashcards

1
Q

Accuracy

A

the quality or state of being correct or precise

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2
Q

Precision

A

the quality, condition, or fact of being exact and accurate

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3
Q

Observation

A

the action or process of observing something or someone carefully or in order to gain information

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4
Q

Inference

A

a conclusion reached on the basis of evidence and reasoning

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5
Q

Hypothesis

A

a conclusion reached on the basis of evidence and reasoning

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6
Q

Independent Variable

A

a variable (often denoted by x ) whose variation does not depend on that of another

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7
Q

Dependent Variable

A

a variable (often denoted by y ) whose value depends on that of another

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8
Q

Constant

A

occurring continuously over a period of time

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9
Q

Control Group

A

used to establish causality by isolating the effect of an independent variable

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10
Q

Quantitive

A

relating to, measuring, or measured by the quantity of something rather than its quality

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11
Q

Qualitative

A

relating to, measuring, or measuring by the quality of something rather than its quantity

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12
Q

Average Speed

A

the total distance traveled by the object in a particular time interval

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13
Q

Instantaneous speed

A

the speed of an object at a particular moment in time

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14
Q

Inertia

A

a property of matter that causes it to resist changes in velocity (speed and/or direction)

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15
Q

Newtons 1st law

A

every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

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16
Q

Newtons 2nd Law

A

a force to be equal to change in momentum (mass times velocity) per change in time

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17
Q

Newtons 3rd Law

A

for every action (force) in nature there is an equal and opposite reaction

18
Q

Kinetic Energy

A

energy which a body possesses by virtue of being in motion.

19
Q

Potential Energy

A

stored energy that depends upon the relative position of various parts of a system

20
Q

Mechanical Energy

A

the energy of either an object in motion or the energy that is stored in objects by their position, (both kinetic and potential)

21
Q

Conductor

A

a substance or material that allows electricity to flow through it

22
Q

Insulator

A

a material that does not easily allow heat and/or electricity to pass through it

23
Q

Work

A

the transfer of energy by a force acting on an object as it is displaced

24
Q

Power

A

time rate of doing work or delivering energy

25
Circuit
a complete circular path that electricity flows through.
26
Voltage
a quantitative expression of the potential difference in charge between two points in an electrical field.
27
Resistance
the opposition that a substance offers to the flow of electric current.
28
Current
he rate at which electrons flow past a point in a complete electrical circuit
29
Wave
a disturbance in a medium that carries energy without a net movement of particles.
30
mechanical wave
wave that is an oscillation of matter and is responsible for the transfer of energy through a medium.
31
electromagnetic wave
waves that are created as a result of vibrations between an electric field and a magnetic field
32
wavelength
the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
33
period
a length or portion of time
34
frequency
the rate at which something occurs or is repeated over a particular period of time or in a given sample.
35
amplitude
the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position.
36
reflection
when light bounces off an object.
37
Refraction
the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another
38
Diffraction
the spreading of waves as they pass through or around an obstacle.
39
Absorption
when something takes in another substance.
40
Weight
the gravitational force of attraction on an object, caused by the presence of a massive second object, such as the Earth or Moon
41
54- joules 58-stores chemical energy and converts it to electrical energy. 60- add all ohms, divide the V by the added-up ohms 69- 129HZ
18- D 20- D 25-A 30- B 31- V=IxR 32-A 33- A 34-C 35-B 39- Control group- Litter B 47- correct 48- Newtons 1st law 53- joules 54- Joules 58 stores chemical energy and converts it to electrical energy. 60- add up ohms, I=V/R 69-129Hz