# Physical Science Semester 1 Final

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A measurement standard is defined as ____.

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## Tags and Description

### 165 Terms

1

A measurement standard is defined as ____.

The exact quantity people agree to use for comparison

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2

The prefix kilo- means ____.

1000

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3

The prefix milli- means ____.

0.001

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4

The correct symbol for the SI unit of temperature is ____.

K

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5

The SI unit that is used to measure time is the ____.

second

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6

The variable plotted on the horizontal or *x-*axis is called the ____.

independent variable

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7

How many meters are there in 1,865 cm?

18.65

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8

In a graph showing temperature change of a material over time, temperature change is the ____.

dependent variable

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9

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

circle graph

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10

One benefit of the SI system is that it is ____.

its based on multiples of 10

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11

A beaker contains 0.32 L of water. What is the volume of this water in milliliters?

320 mL

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12

A box is 25 cm long, 6 cm wide, and 4 cm high. How many cubic centimeters of water can it hold?

600

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13

The lightbulb is an example of ____.

technology

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14

Another term for technology is ____.

applied science

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15

The process of gathering information through the senses is called ____.

observation

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16

When designing an experiment, the first step is to ____.

state the problem

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17

A rule or principle that describes what happens in nature is a ____.

scientific law

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18

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

theory

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19

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

model

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20

In an experiment to determine whether the popping of popcorn is affected by the temperature at which it is stored, counting the popped kernels is an example of a(n) ____.

observation

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21

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

control

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22

A factor in an experiment that changes from the manipulation of the independent variable is the ____.

dependent variable

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23

A factor that does NOT change in an experiment is the ____.

constant

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24

Studying the effect of one thing on another in order to test a hypothesis is a(n) ____.

experiment

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25

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

independent variable

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26

The application of scientific knowledge to help people is ____.

technology

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27

List the following from smallest to largest (dekameter, centimeter, decimeter, millimeter, kilometer)

millimeter, centimeter, decimeter, dekameter, kilometer

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28

Scientists does research on the topic

gather information

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29

state the problem

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30

Scientists makes an educated prediction

Form Hypothesis

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31

Scientist tests the hypothesis to determine the effect of one thing on another using controlled conditions

experiment

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32

Scientists carefully look at the data they collect and determine what it is actually saying.

analyze results

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33

Scientists decide whether or not they should accept or reject their hypothesis based on the data.

drawing conclusions

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34

What part of the experiment was the food?

constant

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35

What part of the experiment was the heartbeat?

dependent variable

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36

What part of the experiment was the water temperature?

constant

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37

What part of the experiment was population two?

control

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38

What part of the experiment was the caffeine?

independent variable

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39

An object in motion at a constant velocity will change its motion only if a balanced force acts on it.

False

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40

The relationship s = d/t can be used to calculate speed, distance or time.

true

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41

If you were trying to get out of the way of a storm, you would need to know ONLY the speed at which it was moving.

false

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42

In a car crash, inertia could cause you to crash into the windshield.

true

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43

When the forces acting on an object are unbalanced, the net force is zero.

false

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44

Acceleration occurs when velocity changes.

true

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45

In the equation a = (Vf – Vi)/t, Vf stands for

final velocity

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46

___ is a measure of how far an object has moved.

distance

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47

An object changing its speed from 10 m/s to 3 m/s is undergoing ____ acceleration.

negative

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48

The speed and direction with which an object moves is its ____.

velocity

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49

As a car slows down approaching a red traffic light its ______ is negative.

acceleration

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50

Acceleration occurs when an object changes its ______ or ______ both.

speed, direction

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51

The slope of the distance-time graph gives the ______.

speed, velocity

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52

If the forces acting on an object at rest are _______, the object will remain at rest

balanced

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53

The equation used to find acceleration is a = ____.

vf – vi/t`

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54

A horizontal line on a velocity/time graph shows ____ acceleration.

zero

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55

Inertia varies depending on ____.

mass

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56

The relationship among speed, distance, and time is ____.

s= d/t

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57

3 m/s north is an example of a(n) ____.

velocity

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58

Motion is a change in ____.

position

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59

A box is 25 cm long, 6 cm wide, and 4 cm high. How many cubic centimeters of water can it hold?

600

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60

Newton's first law of motion is also called the law of ____.

inertia

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61

A merry-go-round horse moves at a constant speed but at a changing ____.

velocity

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62

Acceleration is rate of change of ____.

velocity

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63

A single point on a distance-time graph tells the ____.

instantaneous speed

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64

If you ride your bicycle down a straight road for 500 m then turn around and ride back, your distance is ____ your displacement.

greater than

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65

If you ride your bike up a hill, then ride down the other side, your acceleration is ____.

first negative, then positive

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66

The speed you read on a speedometer is ____.

instantaneous speed

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67

Balanced forces acting on an object cause the object to accelerate.

false

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68

Gravity causes all falling objects to accelerate at a rate of 98 m/s2.

false

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69

Acceleration is defined as the rate of change of position.

false

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70

The momentum of a 5,000-kg truck that is standing still is greater than the momentum of a 3,000-kg truck that is also at rest.

false

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71

Projectile motion is composed of only a horizontal velocity.

false

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72

When an object falls, it is reacting to the force of gravity.

true

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73

Jane is on a merry-go-round that is moving at a constant speed. Her velocity is also constant.

false

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74

Momentum is a property of an object and cannot be transferred from that object to another object.

false

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75

Objects in Earth's orbit appear to be weightless because they are in free fall.

true

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76

Friction is a force that encourages motion between two surfaces that are touching each other.

false

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77

The greater an object's mass, the weaker the gravitational force on it.

false

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78

When a ball is dropped, it falls down due to the force of friction.

false

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79

To continue pushing a box up a hill (assume the box is already in motion), you have to overcome static friction.

false

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80

A box doesn't move when you push it because of rolling friction.

false

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81

The upward force on an object falling through the air is ____.

air resistance

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82

The relationship among mass, force, and acceleration is explained by ____.

newtons 2nd law of motion

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83

A feather will fall through the air more slowly than a brick because of ____.

air resistance

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84

In the absence of air, a penny and a feather that are dropped from the same height at the same time will ____.

fall at the same rate

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85

The acceleration due to gravity is ____.

9.8 m/s^2

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86

According to Newton's second law of motion, ____.

F = m ´ a

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87

When an object moves in a circular path, it accelerates toward the center of the circle as a result of ____.

centripetal force

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88

The path of a projectile is ____.

curved

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89

For any object, the greater the force that's applied to it, the greater its ____ will be.

acceleration

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90

The size of the gravitational force between two objects depends on their ____.

masses and the distance between them

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91

As you get farther from the center of Earth, your weight will ____.

decrease

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92

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

action-reaction

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93

A real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car ____.

has greater mass

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94

In the equation p = m × v, the p represents ____.

momentum

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95

The statement "to every action there is an equal and opposite reaction" is ____.

newton’s 3rd law of motion

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96

he unit of momentum is ____.

kg ´ m/s

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97

When two balls collide, the momentum of the balls after the collision is explained by ____.

the law of conservation of momentum

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98

An object that is in free fall seems to be ____.

weightless

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99

If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.

travel horizontally

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100

A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. Assume the string breaks at point A. In which direction will the ball be traveling an instant later?

direction d

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