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Ap Physical science > 1st Semester test > Flashcards

1st Semester test Flashcards

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0
Q

The prefix kilo Means

A

1000

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1
Q

What involves the study of matter and it’s motion through space and time

A

Physics

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2
Q

The correct symbol for the SI unit of temp is

A

(K) kelvin

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3
Q

The SI unit that is used to measure time is

A

Second

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4
Q

The variable plotted on the horizontal or x Axis is called

A

Independent variable

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5
Q

How many meter are there in 1865 cm

A

18.65

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6
Q

The best type of graph to use to show how some fixed quantity is broken Down into parts is

A

Circle graph

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7
Q

A beaker contains .32L of water what is the volume of this water in milliliters

A

320mL

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8
Q

Another term for technology is

A

Applied science

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9
Q

The process if gathering information through the senses is called

A

Observation

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10
Q

When designing an experiment the first step is to

A

State the problem

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11
Q

A factor manipulated in an experiment to change the dependent variable is the

A

Independent variable

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12
Q

A rule or principle that describes what happens in nature is _____

A

Scientific law

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13
Q

What is a system of knowledge and the methods used do find that knowledge

A

Science

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14
Q

An explanation of an event that is based on repeated observations and experiments is a _______

A

Theory

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15
Q

The building blocks of matter

A

Atoms

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16
Q

An idea, event, or object can be represented by a _______ to help people better understand it

A

Model

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17
Q

A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the _____

A

Control

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18
Q

A factor in an experiment that change from the manipulation of the independent variable is the_______

A

Dependent variable

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19
Q

A factor that does not change in the experiment

A

Constant

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20
Q

Motion is a change in

A

Position

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21
Q

3 m/s north is an example of a

A

Velocity

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22
Q

A merry-go-round horse moves at a constant speed but a changing______

A

Velocity

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23
Q

Acceleration is a rate of change of

A

Velocity

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24
Q

A horizontal line on a velocity/time graph shows_____

A

Same speed

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25
Q

Inertia varies depending on

A

Mass

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26
Q

Newton’s first law of motion is also called the law of_____

A

Inertia

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27
Q

What is the speed of a bobsled whose distance-time graph indicates that it traveled 100m in 25s

A

2 m/s^2

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28
Q

Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1s what the Accerlation

A

2m/s^2

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29
Q

Te upward force on an object falling through the air is ______

A

Air resistance

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30
Q

The relationship among mass, force, and acceleration is explained by ______

A

Newtons 2 law of motion

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31
Q

A feather will fall through the air more slowly than a brick because of_______

A

Air resistance

32
Q

The acceleration due to gravity is

A

9.8 m\s^2

33
Q

According to newtons 2 law of motion

A

F=m•a

34
Q

When an object moves in a circular path, it Accerelates toward the center if the circle as a result of

A

Centripetal force

35
Q

The path if a projectile is ______

A

Curved

36
Q

For any object, the greater the force that’s applied to it, the greater it______ will be

A

Acceleration

37
Q

The size of the gravitational force between two objects depends in their _________

A

Masses and the distance between them

38
Q

When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called?

A

Action-reaction

39
Q

The statement “to every action there is an equal and opposite reaction” is_________

A

Newton’s third law of motion

40
Q

A 300-N force acts on a 25-kg object. The acerelation of the object is

A

12 m/s^2

41
Q

The SI unit of force is the

A

Newton

42
Q

When an unbalanced force acts on an objects

A

The object accelerates

43
Q

What is the momentum of a 50- kilogram ice skater gliding across the ice at a speed of 5 m/s

A

250 kg• m/s

44
Q

The rate at which work is done is called

A

Power

45
Q

The unit of power

A

Watt

46
Q

If you exert a force of 10 N to lift a box a distance of .9 m, how much work do you do?

A

9J

47
Q

The kinetic energy of an object increases as it_______ increases

A

Velocity

48
Q

The SI unit for energy

A

Joule

49
Q

A bus engine transfer chemical potential energy into _______ so that the bus moves

A

Kinetic energy

50
Q

In a nuclear fusion reaction, mass Is transferred into______

A

Energy

51
Q

According to the law if conservation of energy, the total amount of energy in the universe _____

A

Is never created or destroyed but change forms

52
Q

A material that reduces the flow of heat by conduction, convention and radiation is _____

A

An insulator

53
Q

The transfer if energy that does big require matter is ________

A

Radiation

54
Q

Energy from the sun travels to earth as________

A

Radiant energy

55
Q

The process by which engine fuels burn is called

A

Combustion

56
Q

A device that converts thermal energy into mechanical energy is a____________

A

Heat engine

57
Q

The energy of motion is called?

A

Kinetic energy

58
Q

A small 20-kilogram canoe Is floating downriver at a speed of 2 m/s. What is the canoes kinetic energy?

A

40J

59
Q

An objects graviton all potential energy is not directly related to which if the following

A

It’s speed

60
Q

A 4- kilogram cat is resting on top of a bookshelf that is 3 meters high. What is the cats gravitational potential energy relative to the floor if the acceleration due to gravity 9.8 m/s^2

A

118J

61
Q

Which of the following increase when an object becomes warmer

A

Thermal energy

62
Q

The energy stored in gasoline is

A

Chemical energy

63
Q

The mechanical energy of an object equals it______

A

Kinetic energy plus it’s potential energy

64
Q

Fossil fuels currently account for the majority of the worlds energy use because they are______

A

Relatively inexpensive and readily available

65
Q

Heat is the transfer of thermal energy from one object to another because of a difference In_______

A

Temperature

66
Q

What property of an object is related go the average kinetic energy if the particles in that object?

A

Temp

67
Q

The formula Q= m•c•

A

C

68
Q

The specific heat of copper is .385 J/g•C* which equation would you use to calculate the amount of heat needed to raise the temp of .75g of copper from 7C to 29C

A

Q= .75 g• .385J/gC •22C

69
Q

Matter that has a definite volume and a definite shape is a

A

Solid

70
Q

Has a definite volume but no for sure shape

A

Liquid

71
Q

Most matter________ when heated

A

Expands

72
Q

The theoretical point at which all molecular motion stops is called

A

Absolute 0

73
Q

The SI unit for pressure

A

Pascal

74
Q

Which of the following states bernollis principle

A

As the speed of a fluid increases the pressure within the fluid decreases

75
Q

Which substance will float in corn syrup

A

Glycerin

76
Q

According to ________ the buoyant force on an object in a fluid is = to the weight of the fluid displaces by the object

A

Archimedes

77
Q

The velocity of a fluid increases the pressure exerted by the fluid decreases

A

Bernoullis principle

Ap Physical science (2 decks)

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