Science Exam 2015

Question 1 of 113

1

Compounds with structures composed in a network pattern _________.

Select one of the following:

Have high melting points
have high boiling points
are always solid at room temperature
all of the above

Explanation

Question 2 of 113

1

Compounds made of molecules can be _____________ at room temperature.

Select one of the following:

solid
liquid
gas
All of the above

Explanation

Question 3 of 113

1

In metals their energy levels overlap. This allows their _________ to be able flow freely from one atom to the next.

Select one of the following:

protons
neutrons
electrons
atoms

Explanation

Question 4 of 113

1

A chemical bond is a force that holds atoms or ions together in a compound.

Select one of the following:

True
False

Explanation

Question 5 of 113

1

When a compound is created it will have the sam properties compared to the properties of elements of which it is composed.

Select one of the following:

True
False

Explanation

Question 6 of 113

1

When a chemical reaction occurs molecules are broken and atoms are rearranged.

Select one of the following:

True
False

Explanation

Question 7 of 113

1

Chemical structure describes the way atoms are bonded within a compound

Select one of the following:

True
False

Explanation

Question 8 of 113

1

Bonds cannot bend, stretch, or rotate.

Select one of the following:

True
False

Explanation

Question 9 of 113

1

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.

Select one of the following:

True
False

Explanation

Question 10 of 113

1

Compounds made of molecules have bonds between each molecule, even though the bonds holding the atoms together within the molecule are ___.

Select one of the following:

strong, weak
weak, strong
strong, strong
weak, weak

Explanation

Question 11 of 113

1

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.

Select one of the following:

7
6
9
8

Explanation

Question 12 of 113

1

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.

Select one of the following:

gain, lose
lose, gain
increase, decrease

Explanation

Question 13 of 113

1

An ionic is made of a bonded to a ____.

Select one of the following:

metal, non-metal
non-metal, to a metal

Explanation

Question 14 of 113

1

Nonmetals are

Select one of the following:

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

Explanation

Question 15 of 113

1

What type of model is this?

Select one of the following:

Space-filling model
Structural Formula
Ball and Stick

Explanation

Question 16 of 113

1

What type of model is this?

Select one of the following:

Space-fillling model
structural formula
ball and stick model

Explanation

Question 17 of 113

1

What type of model is this?

Select one of the following:

Space-filling model
Structural Formula
Ball and Stick model

Explanation

Question 18 of 113

1

How does a ionic compound form?

Select one or more of the following:

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

Explanation

Question 19 of 113

1

How does a covalent bond form?

Select one or more of the following:

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

Explanation

Question 20 of 113

1

Ionic Compounds _______ conduct electricity when melted or dissolved.

Select one or more of the following:

will
will not

Explanation

Question 21 of 113

1

Covalent Compounds _________ conducted electricity when melted or dissolved.

Select one or more of the following:

will
will not

Explanation

Question 22 of 113

1

Which graph represents an object moving with a constant positive velocity?

Select one or more of the following:

A.
B.
C.
D.

Explanation

Question 23 of 113

1

Which graph represents an object at rest?

Select one or more of the following:

A.
B.
C.
D.

Explanation

Question 24 of 113

1

30 m/s westward represents a ____________.

Select one or more of the following:

Speed
Velocity
both speed and velocity
neither

Explanation

Question 25 of 113

1

If you jog for 1hr and travel 10 km, 10km/h describes your ____________.

Select one or more of the following:

momentum
displacement
average speed
acceleration

Explanation

Question 26 of 113

1

An object's speed is a measure of ___________.

Select one or more of the following:

how fast the object is moving
the object's direction
the object's displacement per unit of time
all of the above

Explanation

Question 27 of 113

1

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.

Select one or more of the following:

average speed
instantaneous speed
instantaneous acceleration
displacement

Explanation

Question 28 of 113

1

Which graph represents a constant positive acceleration?

Select one of the following:

A.
B.
C.
D.

Explanation

Question 29 of 113

1

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

Select one of the following:

True
False

Explanation

Question 30 of 113

1

What is distance?

Select one or more of the following:

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

Explanation

Question 31 of 113

1

What is displacement?

Select one or more of the following:

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

Explanation

Question 32 of 113

1

What is acceleration

Select one or more of the following:

A change in speed
A change in direction
A change in speed and direction
None of the above

Explanation

Question 33 of 113

1

The size of static friction is usually larger than the size of your sliding friction force

Select one of the following:

True
False

Explanation

Question 34 of 113

1

The size of your static friction is usually larger than the size of rolling friction force

Select one of the following:

True
False

Explanation

Question 35 of 113

1

The size of your rolling friction force was larger than the size of your sliding friction force.

Select one of the following:

True
False

Explanation

Question 36 of 113

1

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.

Select one of the following:

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

Explanation

Question 37 of 113

1

Which of the following is not accelerated motion

Select one of the following:

a ball being juggled
a woman walking at 2.5 m/s along a straight road
a satellite circling Earth
a braking cyclist

Explanation

Question 38 of 113

1

A tug of war that results in one team pulling the other across the line is an example of ____________.

Select one of the following:

action forces
reaction forces
balanced forces
unbalanced forces

Explanation

Question 39 of 113

1

Moving from 0 m/s to 25 m/s in 8.0 seconds equals an average acceleration of _________.

Select one of the following:

.32 m/s
.32 m/s^2
3.1 m/s
3.1 m/s^2

Explanation

Question 40 of 113

1

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?

Select one of the following:

14.5 m/s
14.5 m/s^2
5.5 m/s
5.5 m/s^2

Explanation

Question 41 of 113

1

The friction between the bristles of your toothbrush and the surfaces of your teeth is an example of __________ friction.

Select one of the following:

Rolling
Sliding
Static
Fluid

Explanation

Question 42 of 113

1

One way to reduce friction in a car engine is to add a(n) lubrication

Select one of the following:

True
False

Explanation

Question 43 of 113

1

What are the fundamental forces?

Select one of the following:

gravity
electromagnetic force
strong nuclear force
weak nuclear force
all of the above
gravity and electromagnetic force only

Explanation

Question 44 of 113

1

The net force is the combination of all forces acting on an object.

Select one of the following:

True
False

Explanation

Question 45 of 113

1

Speed measured in an infinitely small time interval, like a speedometer, is called

Select one or more of the following:

instantaneous acceleration
instantaneous speed
net force

Explanation

Question 46 of 113

1

What is the measurement that correctly describes speed?

Select one or more of the following:

10km/min
9.81 m/s^2
5N
5m
25 m/s eastward

Explanation

Question 47 of 113

1

The measurement that correctly describes velocity is ______.

Select one or more of the following:

10 km/min
9.81 m/s^2
5N
5m
25 m/s eastward

Explanation

Question 48 of 113

1

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.

Select one of the following:

True
False

Explanation

Question 49 of 113

1

The law that states that the unbalanced force acting on an object equals the object's mass times it acceleration is

Select one of the following:

Newtons First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
the law of conservation of momentum

Explanation

Question 50 of 113

1

The law that states that for every action force there is an equal and opposite reaction force is

Select one of the following:

newton's first law of motion
newton's second law of motion
newton's third law of motion
law of conservation of momentum

Explanation

Question 51 of 113

1

The law that states that every object maintains a constance velocity unless acted on by an unbalanced force is

Select one of the following:

Newton's First Law of Motion
Newton's second law of motion
newton's third law of motion
law of conservation of momentum

Explanation

Question 52 of 113

1

Which of the following is correct?

Select one of the following:

w=mg
w=m/g
w=g/m
w=g+m

Explanation

Question 53 of 113

1

What is the unbalanced force that slows down a ball rolling across the floor?

Select one of the following:

the force of friction
the force of gravity
the force of inertia
the force of momentum

Explanation

Question 54 of 113

1

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?

Select one of the following:

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

Explanation

Question 55 of 113

1

Astronauts "float" when inside an orbiting spaceship because they are

Select one of the following:

weightless
in a vaccum
in free fall
outside earth's gravity

Explanation

Question 56 of 113

1

Which of the following is an example of projectile motion?

Select one of the following:

a rolling bowling ball
a dart thrown at a dart board
a balloon risking in the air
a high speed train accelerating

Explanation

Question 57 of 113

1

Whenever a force is exerted, another force occurs that is _ in size, and __ in direction

Select one of the following:

equal, same
smaller, same
equal, opposite
smaller, opposite

Explanation

Question 58 of 113

1

The SI unit of force, named after the scientist who described the relationship between motion and force, is called the

Select one of the following:

Newton
einstein
curie
pasteur

Explanation

Question 59 of 113

1

If the net force on an object is zero, then the object has

Select one of the following:

reaction forces
action forces
unbalanced forces
balanced forces

Explanation

Question 60 of 113

1

According to the universal gravitation equation, the gravitional force between two objects decreases as ________ increases.

Select one of the following:

distance
mass
both
neither

Explanation

Question 61 of 113

1

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.

Select one of the following:

True
False

Explanation

Question 62 of 113

1

What were the minumun requirements to earn a 90% on your bottle rocket?

Select one of the following:

empty carbonated bottle
fins
nose
all of the above
none of the above

Explanation

Question 63 of 113

1

A object stops accelerating when the force of air resistance becomes ______ the gravitational force on the object.

Select one or more of the following:

more than
less than
equal to

Explanation

Question 64 of 113

1

When the weight and air resistance are equal, a falling object reaches it's

Select one or more of the following:

net force
instantaneous acceleration
projectile motion
terminal velocity

Explanation

Question 65 of 113

1

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

Select one or more of the following:

fluid
bottle
air

Explanation

Question 66 of 113

1

The force of gravity _____ increase as mass _. These are _____ proportional

Select one or more of the following:

increases, decreases, inversely
increases, increases, directly

Explanation

Question 67 of 113

1

The force of gravity ____ as distance . These are _ proportional.

Select one of the following:

increases, decreases, inversely
increases, increases, directly

Explanation

Question 68 of 113

1

You flicked an index card forward, while the penny on top of the card remained stationary.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 69 of 113

1

Your binder remained stationary, being pulled down by gravity and supported by the desk.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 70 of 113

1

You rolled a heavy ball and a light ball with the same force to view their acceleration.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 71 of 113

1

You rolled two balls with with the same mass, but with different forces to view their acceleration.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 72 of 113

1

You dropped a ball at the same time you threw a ball to see which hit the ground first.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 73 of 113

1

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.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 74 of 113

1

The balloon-powered pinwheel spins because of action-reaction forces.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 75 of 113

1

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.

Select one of the following:

Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

Explanation

Question 76 of 113

1

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?

Select one of the following:

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.

Explanation

Question 77 of 113

1

Two components of projectile motion are horizontal gravitational acceleration and vertical gravitational acceleration.

Select one of the following:

True
False

Explanation

Question 78 of 113

1

The forces that hold different atoms or ions together are

Select one of the following:

electric currents
chemical bonds
physical bonds
nuclear forces

Explanation

Question 79 of 113

1

An ionic bond is a bond that forms between

Select one of the following:

ions with opposite charges
atoms with neutral charges
one atom's nucleus and another atom's electrons
the electrons of two different atoms

Explanation

Question 80 of 113

1

In which type of bond do atoms share electrons?

Select one of the following:

ionic
covalent
metallic
polatomic

Explanation

Question 81 of 113

1

Is this an endothermic or exothermic reaction?

Select one of the following:

endothermic
exothermic

Explanation

Question 82 of 113

1

If one measured the temperature of the chemicals reacting in Figure 2, what would have happened to the temperature as the chemical reaction progressed?

Select one of the following:

the temperature would drop
the temperature would rise
the temperature would remain constant
this cannot be determined with the information provided

Explanation

Question 83 of 113

1

The arrangement of _ and ___ within a substance is its chemical structure

Select one or more of the following:

atoms
electrons
protons
elements
ions

Explanation

Question 84 of 113

1

In ionic compounds, the positively charged ions are formed from non-metal elements

Select one of the following:

True
False

Explanation

Question 85 of 113

1

What is the name of BeF^2

Select one of the following:

Beryllium Flouride
Beryllium Floroxide

Explanation

Question 86 of 113

1

What is the chemical formula for Potassium Oxide is K^2O

Select one of the following:

True
False

Explanation

Question 87 of 113

1

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

Select one of the following:

endothermic
exothermic

Explanation

Question 88 of 113

1

The energy need to start a chemical reaction is called

Select one of the following:

activation energy
reactancts
kinetic energy

Explanation

Question 89 of 113

1

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.

Select one of the following:

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.

Explanation

Question 90 of 113

1

What does W for J stand for?

Select one of the following:

Work
Watt

Explanation

Question 91 of 113

1

What does W the unit stand for?

Select one of the following:

Watt
Work

Explanation

Question 92 of 113

1

What conclusion(s) could draw from the level lab #1 which you completed in class

Select one of the following:

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

Explanation

Question 93 of 113

1

Machines make work less

Select one of the following:

True
False

Explanation

Question 94 of 113

1

The AMA must alway be greater than the IMA when there is NO friction

Select one of the following:

True
False

Explanation

Question 95 of 113

1

A first class lever can have an input force greater than the output force

Select one of the following:

True
False

Explanation

Question 96 of 113

1

A second-class lever always has an input force that is less than the output force.

Select one of the following:

True
False

Explanation

Question 97 of 113

1

Increasing the angle a ramp makes with the horizontal decrease the mechanical advantage

Select one of the following:

True
False

Explanation

Question 98 of 113

1

Increasing the height of a ramp increases the efficiency of a ramp

Select one of the following:

True
False

Explanation

Question 99 of 113

1

A meteorologist trying to predict global warming would consider Earth to be a closed system

Select one of the following:

True
False

Explanation

Question 100 of 113

1

A pair of tweezers is

Select one of the following:

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

Explanation

Question 101 of 113

1

What is the mechanical advantage of a ramp 2.0 m long and .50 m tall?

Select one of the following:

1.0
2.5
4
None of the above

Explanation

Question 102 of 113

1

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?

Select one of the following:

57N
280 N
285N
1425N

Explanation

Question 103 of 113

1

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.

Select one of the following:

.15m/s^2
1.7 m/s^2
6.6 m/s^2
9.8 m/s^2

Explanation

Question 104 of 113

1

The law of conservation of energy states that energy

Select one of the following:

is created from motion
cannot be created or destroyed
is always equal and opposite
can only be converted into heat

Explanation

Question 105 of 113

1

Which of the following processes requires the most work?

Select one of the following:

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

Explanation

Question 106 of 113

1

all levers have a rigid arm that turns around a point called the fulcrum

Select one of the following:

True
False

Explanation

Question 107 of 113

1

a(n) wedge is a inclined plane wrapped around a cylinder

Select one of the following:

True
False

Explanation

Question 108 of 113

1

The process that transform light into chemical energy in plants is called photosynthesis

Select one of the following:

True
False

Explanation

Question 109 of 113

1

What does I in IMA stand for?

Select one of the following:

Ideal
Inverse

Explanation

Question 110 of 113

1

What does the A in AMA stand for?

Select one of the following:

Actual
Adverse

Explanation

Question 111 of 113

1

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 .

Select one of the following:

multiplies the force, less, more
multiplies the distance, less, more
multiplies the force, more, less
multiplies the distance, more, less

Explanation

Question 112 of 113

1

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 ________.

	Created by josierobins over 9 years ago

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

Science Exam 2015

Question 1 of 113

Compounds with structures composed in a network pattern _________.

Select one of the following:

Explanation

Question 2 of 113

Compounds made of molecules can be _____________ at room temperature.

Select one of the following:

Explanation

Question 3 of 113

In metals their energy levels overlap. This allows their _________ to be able flow freely from one atom to the next.

Select one of the following:

Explanation

Question 4 of 113

A chemical bond is a force that holds atoms or ions together in a compound.

Select one of the following:

Explanation

Question 5 of 113

When a compound is created it will have the sam properties compared to the properties of elements of which it is composed.

Select one of the following:

Explanation

Question 6 of 113

When a chemical reaction occurs molecules are broken and atoms are rearranged.

Select one of the following:

Explanation

Question 7 of 113

Chemical structure describes the way atoms are bonded within a compound

Select one of the following:

Explanation

Question 8 of 113

Bonds cannot bend, stretch, or rotate.

Select one of the following:

Explanation

Question 9 of 113

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.

Select one of the following:

Explanation

Question 10 of 113

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

Select one of the following:

Explanation

Question 11 of 113

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.

Select one of the following:

Explanation

Question 12 of 113

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.

Select one of the following:

Explanation

Question 13 of 113

An ionic is made of a ________ bonded to a ____________.

Select one of the following:

Explanation

Question 14 of 113

Nonmetals are

Select one of the following:

Explanation

Question 15 of 113

What type of model is this?

Select one of the following:

Explanation

Question 16 of 113

What type of model is this?

Select one of the following:

Explanation

Question 17 of 113

What type of model is this?

Select one of the following:

Explanation

Question 18 of 113

How does a ionic compound form?

Select one or more of the following:

Explanation

Question 19 of 113

How does a covalent bond form?

Select one or more of the following:

Explanation

Question 20 of 113

Ionic Compounds _______ conduct electricity when melted or dissolved.

Compounds made of molecules have bonds between each molecule, even though the bonds holding the atoms together within the molecule are ___.

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.

An ionic is made of a bonded to a ____.