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Christian 7th Grade > physics test 2 > Flashcards

physics test 2 Flashcards

1
Q

List the six steps of the scientific method

A 
step 1recognize a problem.
Step 2make a hypothesis.
Step 3make predictions for hypothesis.
Step 4perform experiments.
Step 5form a conclusion.
Step 6 communicate your results.
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2
Q

what is a hypothesis?

A

an educated guess that must be tested. This is never truly proven.

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3
Q

in science measurements are taken into ways. Name the two ways

A

quantitative measurement produces a definitive specific value. Qualitative measurement is non-numerical descriptions

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4
Q

in the metric system how do you Measure link?

A

meters

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5
Q

in the metric system mass is measured

A

in kilograms

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6
Q

in the metric system newtons measure

A

weight

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7
Q

Time is measured in

A

seconds

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8
Q

in the metric system leaders or centimeters cubed (cm3) measure

A

volume

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9
Q

in metrics temperature is measured with

A

Celsius

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10
Q

Tera (T)

A

trillion

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11
Q

giga (G)

A

Billion

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12
Q

mega (M)

A

million

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13
Q

Thousand

A

kilo (K)

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14
Q

hecto (H)

A

hundred

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15
Q

Deca (D)

A

10

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16
Q

Pico (P)

A

trillionth

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17
Q

Nano (n)

A

billionth

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18
Q

Micro (m)

A

millionth

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19
Q

milli (m)

A

Thousandth

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20
Q

centi (c)

A

hundredth

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21
Q

deci (d)

A

tenth

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22
Q

in the English system link is measured by

A

foot, yard, mile

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23
Q

in the English system wait is measured by

A

ounces or pounds

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24
Q

in English system mass is measured by

A

ounces or pounds

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25
Q

in English system temperature is measured by

A

Fahrenheit

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26
Q

in English that system time is measured by

A

Second the same as the metric system

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27
Q

in the in the system volume is measured by

A

gallons, quarts, pints

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28
Q

in science unit conversion is only able to be converted to these three

A

metric to English, English to metric, metric to metric

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29
Q

one-mile is equal to how many feet

A

5280 feet

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30
Q

1 inch is equal to how many centimeters

A

2.54 cm

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31
Q

One Newton equals how many pounds

A

0.2248 pounds

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32
Q

1 kg is equal to how many pounds

A

2.2 pounds

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33
Q

1 cm³ is equal to how many milliliters (mL)

A

1 mL

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34
Q

1 gallon is equal to how many liters

A

3.7 9L

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35
Q

1 m³ is equal to how many cubic feet

A

35.3 ft.³

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36
Q

what is the conversion from Celsius to Fahrenheit

A

C=(5/9)(F-32)

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37
Q

what is the conversion from Fahrenheit to Celsius

A

F=(95)(c)+32

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38
Q

what is a unit multiplier?

A

A fraction that allows conversion from one unit to another. A unit multiplier allows you to cancel the units you don’t want so that your left only with unit you do want

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39
Q

what is the definition of speed?

A

The average speed is the distance traveled divided by the time it took to travel this distance

s= distance/Time

speed is also the magnitude of the velocity

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40
Q

what is the definition of velocity

A

A physical vector quantity of magnitude and direction I needed to find it

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41
Q

what is the difference between speed and velocity

A

velocity is the change in motion

42
Q

define precision

A

how specific your answer is

43
Q

define accuracy

A

how correct your answer is

44
Q

what is margin of error?

A

The amount of acceptable Error in an experiment

45
Q

define displacement

A

The overall change in position of an object. If an object returns to its original position it’s Displacement equals zero

46
Q

define units of acceleration

A

The SI unit of acceleration is the meter per second squared. m/s2
or more meaningfully meters per second per second

47
Q

instantaneous velocity

A

v=at accelerating object time can be found by multiplying the acceleration by the number of seconds.

If the object had in tail velocity other than zero at the product of acceleration in time to this initial velocity v=v0+va

48
Q

and object at rest will stay at rest unless acted on by an unbalanced force and an object in motion will stay in motion at the same velocity unless acted on by an unbalanced force

A

newtons first law

49
Q

inertia

A

The tendency of things to resist change in motion. Every object made up of matter has inertia. The amount of mass determines the objects inertia.

50
Q

The quantity of matter in an object. It also is a measure of that objects inertia

A

mass

51
Q

weight

A

The force upon an object caused by gravity. The metric unit of measure is in Newton

52
Q

The acceleration of an object is directly proportional to the net force acting on that object In the direction of the net force and inversely proportional to the mass of the object

A

newtons second law of motion

53
Q

The equation for newtons second law of motion

A

A=f/m
f=ma
m=f/a

54
Q

Force

A

push or pull. It involves both magnitude and direction.

55
Q

net force

A

The sum of the forces acting on an object makes acceleration

56
Q

vector vs scalar quantity

A

Victor has both magnitude and direction while scaler quantity only has direction

57
Q

when object his balance forces acting on it there are two types dynamic and static

A

equilibrium

58
Q

normal force

A

Force produced by a surface

59
Q

tension force

A

Force produced by a rope

60
Q

friction

A

The force resisting the relative motion of salad services, fluid layers, and material elements sliding against each other. There are several types of friction

61
Q

communicate your results is what step in the scientific method

A

The sixth or last step

62
Q

true or false? A hypothesis can never be proven your experiments

A

true

63
Q

do you know of a weight in the metric system is the

A

Gram or kilogram

64
Q

convert 0.000238 Megabytes to bytes

A

23,800 bytes

65
Q

convert micrometers 3000 to dm

A

3.0 dm

66
Q

convert 0.0003 km to inches

A

12.12 inches

67
Q

Comfort 34°C to Fahrenheit

A

93.2 Fahrenheit degrees

68
Q

what is the unit of volume in the metric system

A

cubic centimeter, leaders, m3

69
Q

The amount of acceptable air in an experiment

A

margin of error

70
Q

The prefix for billionth is

A

giga

71
Q

The prefix for hundred is

A

hecto

72
Q

abbreviation for the prefix micro is

A

that funky little m

73
Q

choose the prefix that would describe the largest quantity. Deca? Kilo? Milli? Pico?

A

kilo

74
Q

what is a reference point?

A

an object that is at rest and is used to judge if other objects are moving

75
Q

what is the formula for total distance?

A

average speed/total time

76
Q

A jogger runs 1 km in three minutes. Calculate her average speed in m/s

A

33.3 m/s

77
Q

convert 78.9 m/s to mph

A

176.5 mph

78
Q

velocity can best be defined as

A

speed and direction

79
Q

you’re on a treadmill that is moving at 4 mph south. What must your velocity be so that the resultant velocity will ensure you stay on the treadmill?

A

4 mph north

80
Q

would it be possible for you to run around in a circle at constant velocity?

A

perhaps, it depends on the size of the circle

81
Q

and I just goes from 32 m/s to rest in four seconds. Calculate its acceleration

A

8 m/s

82
Q

under what condition would object average an instantaneous velocity definitely be the same

A

The object has a constant velocity

83
Q

true or false? A plane traveling a constant velocity is not definitely traveling a constant speed and a plane traveling a constant speed is definitely traveling a constant velocity

A

true

84
Q

how long would it take for a car traveling at an average speed of 55 mph to travel 116 miles

A

0.45 hours

85
Q

is this a scientifically accurate statement? My acceleration cause me to reach a velocity of 3 m/s squared

A

yes

86
Q

A llama runs 100 m to the right then turns around and runs 80 m to the left. The entire time was 10 seconds. Calculate its velocity.

A

2 m/s

87
Q

quantities that can be represented completely with numbers and units are called

A

scalars or scalar quantities

88
Q

vector quantity or vector

A

represented by both a magnitude (number and units) and a direction.

89
Q

instantaneous acceleration

A

acceleration at a particular instance

90
Q

average acceleration

A

deceleration an object experiences over a period of time

91
Q

Constant or uniform acceleration

A

when an object accelerates at a constant rate. When an object acceleration is constant it’s instantaneous acceleration is the same as every acceleration for that period of time

92
Q

uniform velocity is represented by what type of graph

A

A straight line segment graph

93
Q

define force

A

A push or a pole. Something that is capable of changing an objects velocity

94
Q

inertia

A

and object tendency to resist changes in motion

95
Q

friction

A

A force that exist between two objects that are touching, which raises their motion relative to each other

96
Q

what are the two types of friction

A

static friction went to objects are not living relative to each other. Kinetic Friction when one object is living relative to the other

97
Q

weight

A

The force of attraction between two objects due to gravity

98
Q

Vector

A

A quantity having both magnitude and direction

99
Q

velocity

A

speed in a particular direction. velocity is the vector counterpart to the scaler quantity called speed.

100
Q

acceleration

A

The rate at which velocity changes. The term acceleration means approximately the same thing in physics as it doesn’t every day life except that it is a vector quantity so direction is important.

Christian 7th Grade (8 decks)

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