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Science Exam 2015

Beschreibung

This is study prep for the spring semester exam. It goes over all of the questions from the quizzes and tests that Mrs. Malinowski gave us. This is for USN eighth grade students. It include Chapter 6, 7, 11, 12, and 13
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Zusammenfassung der Ressource

Frage 1

Frage
Compounds with structures composed in a network pattern _________.
Antworten
  • Have high melting points
  • have high boiling points
  • are always solid at room temperature
  • all of the above

Frage 2

Frage
Compounds made of molecules can be _____________ at room temperature.
Antworten
  • solid
  • liquid
  • gas
  • All of the above

Frage 3

Frage
In metals their energy levels overlap. This allows their _________ to be able flow freely from one atom to the next.
Antworten
  • protons
  • neutrons
  • electrons
  • atoms

Frage 4

Frage
A chemical bond is a force that holds atoms or ions together in a compound.
Antworten
  • True
  • False

Frage 5

Frage
When a compound is created it will have the sam properties compared to the properties of elements of which it is composed.
Antworten
  • True
  • False

Frage 6

Frage
When a chemical reaction occurs molecules are broken and atoms are rearranged.
Antworten
  • True
  • False

Frage 7

Frage
Chemical structure describes the way atoms are bonded within a compound
Antworten
  • True
  • False

Frage 8

Frage
Bonds cannot bend, stretch, or rotate.
Antworten
  • True
  • False

Frage 9

Frage
The chemical structure of a compound determines the properties of that compound. For instance a network of ions behave differently that a compound of molecules.
Antworten
  • True
  • False

Frage 10

Frage
Compounds made of molecules have ________ bonds between each molecule, even though the bonds holding the atoms together within the molecule are ___________.
Antworten
  • strong, weak
  • weak, strong
  • strong, strong
  • weak, weak

Frage 11

Frage
Atoms will bond with other atoms so they have ______ valence electrons (except for hydrogen and helium, which will still have two) in order to become chemically stable.
Antworten
  • 7
  • 6
  • 9
  • 8

Frage 12

Frage
Metals tend to __________ valence electrons when they react to form an ionic bond, and non-metals tend to _________ valence electrons when they react to form a ionic bond.
Antworten
  • gain, lose
  • lose, gain
  • increase, decrease

Frage 13

Frage
An ionic is made of a ________ bonded to a ____________.
Antworten
  • metal, non-metal
  • non-metal, to a metal

Frage 14

Frage
Nonmetals are
Antworten
  • flexible (they can bend and stretch without breaking,)
  • malleable (the can be pounded into thing sheets)
  • ductile (they can be drawn into thin wires)
  • none of the above

Frage 15

Frage
What type of model is this?
Image:
98295511-643d-4696-9894-b5d5c5cac4d5 (image/jpg)
Antworten
  • Space-filling model
  • Structural Formula
  • Ball and Stick

Frage 16

Frage
What type of model is this?
Image:
ef6b90dc-eb1c-49bb-9280-441a8737eb39.gif (image/gif)
Antworten
  • Space-fillling model
  • structural formula
  • ball and stick model

Frage 17

Frage
What type of model is this?
Image:
b662d8dc-ddcd-4ec5-bd4c-ec13f10cc06e (image/jpg)
Antworten
  • Space-filling model
  • Structural Formula
  • Ball and Stick model

Frage 18

Frage
How does a ionic compound form?
Antworten
  • the attraction between oppositely charged ions
  • the attraction between the nucleus, and the shared electrons between them
  • the attraction between an atom's nucleus and the neighboring atom's electrons

Frage 19

Frage
How does a covalent bond form?
Antworten
  • the attraction between oppositely charged ions
  • the attraction between the nucleus and the shared electrons between them
  • the attraction between an atom's nucleus and the neighboring atom's electrons

Frage 20

Frage
Ionic Compounds _______ conduct electricity when melted or dissolved.
Antworten
  • will
  • will not

Frage 21

Frage
Covalent Compounds _________ conducted electricity when melted or dissolved.
Antworten
  • will
  • will not

Frage 22

Frage
Which graph represents an object moving with a constant positive velocity?
Image:
b969ef65-becd-4a71-800e-60d80ae17e79 (image/png)
Antworten
  • A.
  • B.
  • C.
  • D.

Frage 23

Frage
Which graph represents an object at rest?
Image:
9827ba67-63ab-4c26-bccb-de8c3de02107 (image/png)
Antworten
  • A.
  • B.
  • C.
  • D.

Frage 24

Frage
30 m/s westward represents a ____________.
Antworten
  • Speed
  • Velocity
  • both speed and velocity
  • neither

Frage 25

Frage
If you jog for 1hr and travel 10 km, 10km/h describes your ____________.
Antworten
  • momentum
  • displacement
  • average speed
  • acceleration

Frage 26

Frage
An object's speed is a measure of ___________.
Antworten
  • how fast the object is moving
  • the object's direction
  • the object's displacement per unit of time
  • all of the above

Frage 27

Frage
A Car travels a distance of 210 miles in exactly 4h. The driver calculates that he traveled 52.5 mi/h. Which of the following terms most nearly describes his calculation.
Antworten
  • average speed
  • instantaneous speed
  • instantaneous acceleration
  • displacement

Frage 28

Frage
Which graph represents a constant positive acceleration?
Image:
3c686343-4c3e-484a-b03a-fe45f1c3e226 (image/png)
Antworten
  • A.
  • B.
  • C.
  • D.

Frage 29

Frage
In order to determine if an object is moving, you must observe the object in relation to a(n) reference point.
Antworten
  • True
  • False

Frage 30

Frage
What is distance?
Antworten
  • how far you've traveled
  • how far apart you are from your starting point
  • how far you've traveled AND how far apart you are from your starting point
  • none of the above

Frage 31

Frage
What is displacement?
Antworten
  • how far you've traveled
  • how far apart you are from your starting point
  • how far you've traveled AND how far apart you are from your starting point
  • none of the above

Frage 32

Frage
What is acceleration
Antworten
  • A change in speed
  • A change in direction
  • A change in speed and direction
  • None of the above

Frage 33

Frage
The size of static friction is usually larger than the size of your sliding friction force
Antworten
  • True
  • False

Frage 34

Frage
The size of your static friction is usually larger than the size of rolling friction force
Antworten
  • True
  • False

Frage 35

Frage
The size of your rolling friction force was larger than the size of your sliding friction force.
Antworten
  • True
  • False

Frage 36

Frage
If you pulled a book forward, at a constant speed, and the spring scale read 5 N, which of the following conclusions would be correct.
Antworten
  • The forces are unbalanced because the book is moving at a constant speed
  • The force of friction would be 0 Newtons because the the Newt force is 0 Newtons
  • The force of friction would 5 newton's because the net force is 0 Newtons.
  • All of the above are incorrect

Frage 37

Frage
Which of the following is not accelerated motion
Antworten
  • a ball being juggled
  • a woman walking at 2.5 m/s along a straight road
  • a satellite circling Earth
  • a braking cyclist

Frage 38

Frage
A tug of war that results in one team pulling the other across the line is an example of ____________.
Antworten
  • action forces
  • reaction forces
  • balanced forces
  • unbalanced forces

Frage 39

Frage
Moving from 0 m/s to 25 m/s in 8.0 seconds equals an average acceleration of _________.
Antworten
  • .32 m/s
  • .32 m/s^2
  • 3.1 m/s
  • 3.1 m/s^2

Frage 40

Frage
A cyclist is traveling at an initial speed of 10.0 m/s. She accelerates at a rate of 0.500 m/s^2. What is her final speed after 9.0 seconds?
Antworten
  • 14.5 m/s
  • 14.5 m/s^2
  • 5.5 m/s
  • 5.5 m/s^2

Frage 41

Frage
The friction between the bristles of your toothbrush and the surfaces of your teeth is an example of __________ friction.
Antworten
  • Rolling
  • Sliding
  • Static
  • Fluid

Frage 42

Frage
One way to reduce friction in a car engine is to add a(n) lubrication
Antworten
  • True
  • False

Frage 43

Frage
What are the fundamental forces?
Antworten
  • gravity
  • electromagnetic force
  • strong nuclear force
  • weak nuclear force
  • all of the above
  • gravity and electromagnetic force only

Frage 44

Frage
The net force is the combination of all forces acting on an object.
Antworten
  • True
  • False

Frage 45

Frage
Speed measured in an infinitely small time interval, like a speedometer, is called
Antworten
  • instantaneous acceleration
  • instantaneous speed
  • net force

Frage 46

Frage
What is the measurement that correctly describes speed?
Antworten
  • 10km/min
  • 9.81 m/s^2
  • 5N
  • 5m
  • 25 m/s eastward

Frage 47

Frage
The measurement that correctly describes velocity is ______.
Antworten
  • 10 km/min
  • 9.81 m/s^2
  • 5N
  • 5m
  • 25 m/s eastward

Frage 48

Frage
Two different ways that static friction and kinetic friction differ from each other is static is the friction between two surfaces at rest and in contact. Kinetic friction is friction between a surface the is moving and another surface. Static Friction is greater than kinetic friction.
Antworten
  • True
  • False

Frage 49

Frage
The law that states that the unbalanced force acting on an object equals the object's mass times it acceleration is
Antworten
  • Newtons First Law of Motion
  • Newton's Second Law of Motion
  • Newton's Third Law of Motion
  • the law of conservation of momentum

Frage 50

Frage
The law that states that for every action force there is an equal and opposite reaction force is
Antworten
  • newton's first law of motion
  • newton's second law of motion
  • newton's third law of motion
  • law of conservation of momentum

Frage 51

Frage
The law that states that every object maintains a constance velocity unless acted on by an unbalanced force is
Antworten
  • Newton's First Law of Motion
  • Newton's second law of motion
  • newton's third law of motion
  • law of conservation of momentum

Frage 52

Frage
Which of the following is correct?
Antworten
  • w=mg
  • w=m/g
  • w=g/m
  • w=g+m

Frage 53

Frage
What is the unbalanced force that slows down a ball rolling across the floor?
Antworten
  • the force of friction
  • the force of gravity
  • the force of inertia
  • the force of momentum

Frage 54

Frage
In absense of air resistance, how would the acceleration of a 1.5 kg book and the acceleration of 15 kg rock differ if the objects were dropped from the same height?
Antworten
  • The book would accelerate twice as fast as the rock
  • The rock would accelerate twice as fast as the book
  • The book would accelerate ten times as fast as the rock
  • They would not differ; they would be the same

Frage 55

Frage
Astronauts "float" when inside an orbiting spaceship because they are
Antworten
  • weightless
  • in a vaccum
  • in free fall
  • outside earth's gravity

Frage 56

Frage
Which of the following is an example of projectile motion?
Antworten
  • a rolling bowling ball
  • a dart thrown at a dart board
  • a balloon risking in the air
  • a high speed train accelerating

Frage 57

Frage
Whenever a force is exerted, another force occurs that is _______ in size, and ________ in direction
Antworten
  • equal, same
  • smaller, same
  • equal, opposite
  • smaller, opposite

Frage 58

Frage
The SI unit of force, named after the scientist who described the relationship between motion and force, is called the
Antworten
  • Newton
  • einstein
  • curie
  • pasteur

Frage 59

Frage
If the net force on an object is zero, then the object has
Antworten
  • reaction forces
  • action forces
  • unbalanced forces
  • balanced forces

Frage 60

Frage
According to the universal gravitation equation, the gravitional force between two objects decreases as ________ increases.
Antworten
  • distance
  • mass
  • both
  • neither

Frage 61

Frage
A situation known as free fall occurs when astronauts and their surroundings all accelerate at at the same rate. When this occurs the astronauts seem to be weightless.
Antworten
  • True
  • False

Frage 62

Frage
What were the minumun requirements to earn a 90% on your bottle rocket?
Antworten
  • empty carbonated bottle
  • fins
  • nose
  • all of the above
  • none of the above

Frage 63

Frage
A object stops accelerating when the force of air resistance becomes ______ the gravitational force on the object.
Antworten
  • more than
  • less than
  • equal to

Frage 64

Frage
When the weight and air resistance are equal, a falling object reaches it's
Antworten
  • net force
  • instantaneous acceleration
  • projectile motion
  • terminal velocity

Frage 65

Frage
Our bottle rockets works from the upward push on the ________ which is equal to the downward push on the fluid.
Antworten
  • fluid
  • bottle
  • air

Frage 66

Frage
The force of gravity ___________ increase as mass ___________. These are _________ proportional
Antworten
  • increases, decreases, inversely
  • increases, increases, directly

Frage 67

Frage
The force of gravity __________ as distance ________. These are _______ proportional.
Antworten
  • increases, decreases, inversely
  • increases, increases, directly

Frage 68

Frage
You flicked an index card forward, while the penny on top of the card remained stationary.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 69

Frage
Your binder remained stationary, being pulled down by gravity and supported by the desk.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 70

Frage
You rolled a heavy ball and a light ball with the same force to view their acceleration.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 71

Frage
You rolled two balls with with the same mass, but with different forces to view their acceleration.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 72

Frage
You dropped a ball at the same time you threw a ball to see which hit the ground first.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 73

Frage
Your bottle rocket exerted a downward force as the pressurized air escaped from the bottle, which exerted a an equal but opposite force in the opposite dirction causing the rocket to move upward.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 74

Frage
The balloon-powered pinwheel spins because of action-reaction forces.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 75

Frage
The Newton's cradle had one ball dropped, which hit the group of balls, and then one ball was pushed up on the opposite side.
Antworten
  • Newton's 1st Law of Motion
  • Newton's 2nd Law of Motion
  • Newton's 3rd Law of Motion

Frage 76

Frage
If you drop a medicine ball and a basket ball at the same time, how can they accelerate at the same rate, regardless of mass?
Antworten
  • They don't
  • The more mass an object has the more inertia. The less mass the object has the less inertia.
  • Even though the medicine ball has more mass, therefore more gravity, it also has more inertia. Object near earth fall at 9.8 m/s^2 because of this.

Frage 77

Frage
Two components of projectile motion are horizontal gravitational acceleration and vertical gravitational acceleration.
Antworten
  • True
  • False

Frage 78

Frage
The forces that hold different atoms or ions together are
Antworten
  • electric currents
  • chemical bonds
  • physical bonds
  • nuclear forces

Frage 79

Frage
An ionic bond is a bond that forms between
Antworten
  • ions with opposite charges
  • atoms with neutral charges
  • one atom's nucleus and another atom's electrons
  • the electrons of two different atoms

Frage 80

Frage
In which type of bond do atoms share electrons?
Antworten
  • ionic
  • covalent
  • metallic
  • polatomic

Frage 81

Frage
Is this an endothermic or exothermic reaction?
Image:
ec8bcdb4-b100-49f5-b485-2bb8b348387a.gif (image/gif)
Antworten
  • endothermic
  • exothermic

Frage 82

Frage
If one measured the temperature of the chemicals reacting in Figure 2, what would have happened to the temperature as the chemical reaction progressed?
Image:
f95db7c1-55b3-40e3-a56c-83596323d9fe.gif (image/gif)
Antworten
  • the temperature would drop
  • the temperature would rise
  • the temperature would remain constant
  • this cannot be determined with the information provided

Frage 83

Frage
The arrangement of _______ and _________ within a substance is its chemical structure
Antworten
  • atoms
  • electrons
  • protons
  • elements
  • ions

Frage 84

Frage
In ionic compounds, the positively charged ions are formed from non-metal elements
Antworten
  • True
  • False

Frage 85

Frage
What is the name of BeF^2
Antworten
  • Beryllium Flouride
  • Beryllium Floroxide

Frage 86

Frage
What is the chemical formula for Potassium Oxide is K^2O
Antworten
  • True
  • False

Frage 87

Frage
Photosynthesis is an example of a(n) _________ chemical reaction in which plants absorb the sunlight to make glucose and oxygen
Antworten
  • endothermic
  • exothermic

Frage 88

Frage
The energy need to start a chemical reaction is called
Antworten
  • activation energy
  • reactancts
  • kinetic energy

Frage 89

Frage
Describe how the chemical structure of a compound affects its properties. Use the evidence collected in our lab testing the properties of salt and sugar to support your arguments.
Antworten
  • When a compound has strong bonds or weak bonds, it affect their properties. For example, sugar had a low melting point because it had weak bonds. Salt, on the other hand, would not melt because it had a high melting point the requires much more heat because it has strong bonds.
  • When a compound has strong bonds or weak bonds, it affect their properties. For example, salt had a low melting point because it had weak bonds. sugar, on the other hand, would not melt because it had a high melting point the requires much more heat because it has strong bonds.

Frage 90

Frage
What does W for J stand for?
Antworten
  • Work
  • Watt

Frage 91

Frage
What does W the unit stand for?
Antworten
  • Watt
  • Work

Frage 92

Frage
What conclusion(s) could draw from the level lab #1 which you completed in class
Antworten
  • Levers do not have friction
  • the input work and the output work in a lever are equal
  • The IMA and AMA are equal
  • The Efficiency is 100 %
  • All of the above are true

Frage 93

Frage
Machines make work less
Antworten
  • True
  • False

Frage 94

Frage
The AMA must alway be greater than the IMA when there is NO friction
Antworten
  • True
  • False

Frage 95

Frage
A first class lever can have an input force greater than the output force
Antworten
  • True
  • False

Frage 96

Frage
A second-class lever always has an input force that is less than the output force.
Antworten
  • True
  • False

Frage 97

Frage
Increasing the angle a ramp makes with the horizontal decrease the mechanical advantage
Antworten
  • True
  • False

Frage 98

Frage
Increasing the height of a ramp increases the efficiency of a ramp
Antworten
  • True
  • False

Frage 99

Frage
A meteorologist trying to predict global warming would consider Earth to be a closed system
Antworten
  • True
  • False

Frage 100

Frage
A pair of tweezers is
Antworten
  • a first-class lever
  • a compound machine made of two third-class levers
  • a compound machine made of two second-class levers
  • a kind of wedge

Frage 101

Frage
What is the mechanical advantage of a ramp 2.0 m long and .50 m tall?
Antworten
  • 1.0
  • 2.5
  • 4
  • None of the above

Frage 102

Frage
A pulley with a mechanical advantage of 5.00 is used to lift a bucket weighing 285 N. How much force must be used to lift the bucket?
Antworten
  • 57N
  • 280 N
  • 285N
  • 1425N

Frage 103

Frage
An astronaut with a mass of 91kg is .30 m above the moon's surface. The astronaut's potential energy is 46J. Calculate the free fall acceleration on the moon.
Antworten
  • .15m/s^2
  • 1.7 m/s^2
  • 6.6 m/s^2
  • 9.8 m/s^2

Frage 104

Frage
The law of conservation of energy states that energy
Antworten
  • is created from motion
  • cannot be created or destroyed
  • is always equal and opposite
  • can only be converted into heat

Frage 105

Frage
Which of the following processes requires the most work?
Antworten
  • A 10kg weight rests on the table
  • A person holds a 1kg weight still with outstretched arms
  • a person lifts a 1kg weight 1m off the floor
  • a 10 kg ball is rolled .1 N across the floor at a constant speed for 10m

Frage 106

Frage
all levers have a rigid arm that turns around a point called the fulcrum
Antworten
  • True
  • False

Frage 107

Frage
a(n) wedge is a inclined plane wrapped around a cylinder
Antworten
  • True
  • False

Frage 108

Frage
The process that transform light into chemical energy in plants is called photosynthesis
Antworten
  • True
  • False

Frage 109

Frage
What does I in IMA stand for?
Antworten
  • Ideal
  • Inverse

Frage 110

Frage
What does the A in AMA stand for?
Antworten
  • Actual
  • Adverse

Frage 111

Frage
If the mechanical advantage is greater than one, it means that the machine ______________. In normal everyday English, this means that your force is ______ and the machines force is __________.
Antworten
  • multiplies the force, less, more
  • multiplies the distance, less, more
  • multiplies the force, more, less
  • multiplies the distance, more, less

Frage 112

Frage
If the mechanical advantage is less than one, it means that the machine ______________. In normal everyday, this means that your distance is _______ and the machine's distance is __________.
Antworten
  • multiplies the distance, less, more
  • multiplies the distance, more, less

Frage 113

Frage
If the MA is equal to one, it means that the machine _________
Antworten
  • changes the direction
  • multiplies the force
  • multiplies the distance
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