Semester 1 Exam For Science

Front 1

The more particles an object has at a given temperature the more................(what kind of energy)

Back 1

thermal energy

Front 2

How does heat transfer

Back 2

warm objects to colder objects

Front 3

Define heat?

Back 3

the movement from a warm object to a cooler object

Front 4

The particles in objects at higher temperatures are moving

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faster than particles in objects at lower temperatures

Front 5

In a hydroelectric plant the mechanical energy in moving water is transformed into

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electrical energy

Front 6

In organisms cells obtain energy by .......
breaking bonds releases...............

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1.breaking bonds
2. chemical energy

Front 7

Anything that is moving has

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kinetic energy

Front 8

what is work

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work is done on an object when a force eerted on an object causes object to move

Front 9

energy is measured in

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joules

Front 10

in a system when energy is transformed from one form to another the total energy is

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conserved

Front 11

when you rub ur hands together energy you use friction to

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transform mechanical energy into thermal energy

Front 12

an objects mechanical energy is calculated by adding its

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kinetic energy and potential energies

Front 13

.On a graph showing distance versus time, a horizontal line represents an object

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that is not moving at all.

Front 14

The steepness of a line on a graph is called the

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slope.

Front 15

When you know both the speed and direction of an object’s motion

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you know the velocity of the object

Front 16

At the end of a roller coaster ride the brakes are applied and the coaster
quickly comes to a stop. In this example the kinetic energy that the coaster
had is converted to

Back 16

thermal energy.

Front 17

In speed vs. time graphs, a straight line shows that

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acceleration is constant

Front 18

To determine the acceleration of an object moving in a straight line

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you must calculate the change in its speed during each unit of time.

Front 19

The amount of matter in an object is called its

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mass

Front 20

The force of gravity on a person or object at the surface of a planet is
known as

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weight.

Front 21

The law of universal gravitation states that

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any two objects in the universe
that have mass, without exception, attract each other.

Front 22

__________relies on gathering and evaluating evidence.

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Objective reasoning

Front 23

You are investigating the numbers and types of birds in your neighborhood.
If you watch a bird feeder to see which birds appear, you are

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observing

Front 24

.Being able to identify good sources of scientific information and apply the
knowledge to problems in your life is a part of having

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scientific literacy

Front 25

You would measure mass using a

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balance

Front 26

You would use cubic centimeters to measure the volume of a small

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cardboard box

Front 27

You would use a spring scale to measure the weight of an

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orange

Front 28

Electromagnetic waves can transfer energy without a

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medium

Front 29

Electromagnetic waves have

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electrical properties and some magnetic
properties

Front 30

Observations that deal with descriptions that cannot be expressed in
numbers are called

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qualitative observations.

Front 31

.Radio waves are electromagnetic waves that have the

Back 31

lowest frequency
and the longest wavelength

Front 32

The electromagnetic waves with the highest frequencies are called

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gamma
rays.

Front 33

Sound travels the fastest through

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steel

Front 34

The bending of light rays as they enter a new medium is called

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refraction

Front 35

When light passes from air into water the light

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slows down

Front 36

The total energy of all the particles in a substance is called

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thermal energy

Front 37

A measure of the average kinetic energy of the individual particles in an
object is called

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tempature

Front 38

.No more energy can be removed from matter at

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absolute zero.

Front 39

Heat is the transfer of

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thermal energy

Front 40

Heat is transferred from one particle of matter to another without the
movement of matter itself in a process called

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conduction

Front 41

Heated air moves from baseboard heaters to the rest of a room in a process
called

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convection.

Front 42

The transfer of energy by electromagnetic waves is called

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radiation

Front 43

Heat is transferred from one particle to another within an object or
between two objects in a process called

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conduction

Front 44

The ability to do work or cause change is called

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energy

Front 45

In a system, when energy is transformed from one form to another,total energy is

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conserved.

Front 46

what does law of conservation of energy states

Back 46

that when one form of energy is
transformed to another no energy is destroyed in the process.

Front 47

Clara placed an empty mug on the table and poured hot tea into the mug.
When she went to pick up the mug it was too hot to hold.is an example of what?

Back 47

This is an
example of conduction between the tea and the mug.

Front 48

Which has more thermal energy? – 1 liter of water at 15 degrees, 2 liters of
water at 40 degrees, 1 liter of water at 80 degrees,, 2 liters of water at 80
degrees.

Back 48

, 2 liters of water at 80
degrees.

Front 49

A soccer ball that has just been kicked and is rolling across a flat field has energy only.

Back 49

kinetic

Front 50

If something is not moving, it has no energy.

Back 50

kinetic

Front 51

Unlike kinetic energy, potential energy is

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stored

Front 52

The energy associated with motion is called energy.

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kinetic

Front 53

Potential energy that depends on height is called

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gravitational potential
energy

Front 54

If a bicyclist travels 30 km in 2 hrs, her average speed is?

Back 54

15 km /hr

Front 55

A place or object used for comparison to determine if something is in
motion is called

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a reference point.

Front 56

The basic SI unit of length is the

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meter

Front 57

When an object’s position relative to another object is changing, it is in

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motion

Front 58

The International System of Units is used by scientists all over

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the world

Front 59

An example of deceleration would be an object that is

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slowing down

Front 60

An object changing direction is an example of

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acceleration

Front 61

The SI unit of acceleration is
2

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m/s
2

Front 62

The rate at which velocity changes is called

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acceleration

Front 63

A car starts from a stopped position at a red light. At the end of 30 sec, its
speed is 20 m/s. What is the acceleration of the car?

Back 63

.6 m/s2

Front 64

.Friction would be between two rough surfaces rather than two smooth surfaces.

Back 64

greatest

Front 65

The force that one surface exerts on another when the two rub against each other is called

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friction

Front 66

Normal force is an example of a

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contact force

Front 67

is described by its strength and direction.

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force

Front 68

In physical science, a push or a pull is called a

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force

Front 69

According to Newton’s second law of Motion, decreasing the mass of a go kart will increase

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acceleration of go cart

Front 70

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail exerts an

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an equal and opposite force on the
hammer.

Front 71

FM signals travel

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as changes in the frequency of the wave

Front 72

You are investigating a certain plant’s ability to grow. The amount of sun the plant gets, the amount of water the plant gets, and the amount of fertilizer the plant gets provide helpful data. What is not necessary for the investigation?

Back 72

The scientific name of the
plant is not necessary for the investigation.

Front 73

A force is described by

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its strength and direction.

Front 74

An example of thinking scientifically about a topic

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if finding out how bicycles work.

Front 75

describes an observed pattern in nature without attempting to explain it.

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A scientific law

Front 76

The greater the mass of an object,

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the greater its inertia.

Front 77

Forces can be added together

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only if they are acting on the same object

Front 78

When two forces act in the same direction

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their strengths are added.

Front 79

All substances are composed of particles called atoms. This statement is an example of?

Back 79

a scientific theory

Front 80

Most scientists base their climate predictions on

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computer models.

Front 81

A model can be a

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drawing or 3-dimensional representation.

Front 82

When you run, your heart receives a signal to pump faster. In your body’s circulatory system, this signal is an example of

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feedback.

Front 83

A characteristic of the scientific method would be that science is based on

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objective analysis of experimental data.

Front 84

Making a statement or claim about what will happen in the future based on past experience or evidence is called

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predicting.

Front 85

Explaining or interpreting the things you observe based on reasoning from what you already know is called

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inferring

Front 86

When observations deal with amounts or numbers they are called

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quantitative observations.

Front 87

An example of (blank) would be when doctors try to stop the spread of malaria in poor countries.

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social concerns

Front 88

It is important for people to understand scientific principles and to think scientifically in order for them

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to make informed decisions.

Front 89

Sandra went on a 15 km bike ride. How many meters did she ride? Convert from km to meters.

Back 89

15,000 meters

Front 90

The fossils of dinosaurs of the same species were found in Siberia and in England. Determining that the rocks where each of these fossils were found are approximately the same age is an example of

Back 90

a scientific explanation

Front 91

During a controlled experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the

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independent variable.

Front 92

A possible answer to a scientific question is called a

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hypothesis.

Front 93

A line graph shows how the dependent variable changes in response to the

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independent variable.

Front 94

In a vacuum, all electromagnetic waves have the

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same speed.

Front 95

A packet of light energy is called a

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photon

Front 96

An electromagnetic wave from the sun travels through space at the

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speed of light.

Front 97

Light that has passed through a polarizing filter is called

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polarized light.

Front 98

The range of electromagnetic waves placed in a certain order is called the

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electromagnetic spectrum.

Front 99

An image of a distant object caused by refraction of light is called a

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mirage.

Front 100

Visible light has a higher frequency than

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infrared rays.