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WorksheetsPhysical Science Final Exam Review 2020 - 2021
Total questions: 65
Worksheet time: 33mins
Matter is defined as anything that __?__.
can be seen and touched
has mass and takes up space
can be weighed
A substance that cannot be broken down into simpler substances is __?__.
a compound
a mixture
an element
The science of what matter is made of and how it changes is called __?__.
chemistry
kinetics
engineering
The smallest unit of a substance that behaves like the substance is __?__.
a piece
a molecule
a compound
A material that can be represented by a chemical formula is __?__.
an element
a mixture
a pure substance
Which state of matter will hold its shape without a container?
solid
liquid
gas
Which state of matter will hold its shape without a container?
a liquid to a gas
a gas to a liquid
a solid to a liquid
The law of conservation of mass states that mass cannot be __?__.
burned
changed in form
created or destroyed
Which of the following is an example of a chemical change?
ice melting
burning wood into charcoal
a puddle of water evaporating
Which of the following is an example of a physical change?
dissolving salt in water
rusting iron
cooking an egg
Which statement about the nucleus is true?
The nucleus is made up of protons and electrons and has a negative charge
The nucleus is made up of protons and neutrons and has a positive charge
The nucleus is made up of nothing
The charge of an electron is __?__
0
-1
-2
Atoms have no electric charge because they __?__.
have an equal number of charged and noncharged particles
have neutrons in their nuclei
have an equal number of neutrons and protons
The order of elements in the periodic table is based on __?__.
The order of elements in the periodic table is based on __?__.
the electric charge of the nucleus
the electric charge of the nucleus
What is the chemical symbol of hydrogen?
He
Hy
H
How many protons does calcium have?
20
40
60
A mixture is different from a compound because each substance in a mixture __?__.
keeps its own properties
changes its electric charge
forms an ion
A compound is different from a mixture because each substance in a mixture __?__.
always remains frozen even at high temperatures
is formed from two cations
always contains the same elements in the same proportion
Each molecule of table sugar, C12H22O11, contains __?__.
no atoms of carbon
1 atom of carbon
12 atoms of carbon
Often atoms join so that each atom will hve __?__.
an even number of electrons
an outermost energy level that is full of electrons
an equal number of protons and electrons
an equal number of protons and electrons
ions with the same charge
ions with opposite charges
ions with no charge
Covalent bonds are formed between __?__.
ions
nonions
nonmetals
In which type of bond do atoms share electrons?
covalent bonds
ionic bonds
polyatomic bonds
A carbon atom can bond to 4 other atoms because it has __?__.
no protons in its nucleus
no electrons in its nucleus
4 valence electrons
A change in color, such as rusting of metal, is a sign that __?__.
a chemical change is taking place
a physical change is taking place
organic chemical are present
A substance that undergoes a change in a chemical reaction is __?__.
a product
a result
a reactant
What happens in a chemical reaction?
Atoms are destroyed
Atoms are created
Atoms are rearranged
In an exothermic reaction, energy is transferred from __?__.
the reactants to the surroundings
the surrounds to the reactants
nowhere
Which statement about endothermic reactions is correct?
Energy is always created in the form of heat
Energy is transferred from the surrounds to the reactants
Energy is used to force electrons to move to higher energy levels
A chemical equation is balanced by changing or adding __?__.
chemical symbols
subscripts
coefficients
A balanced chemical equation shows the proportions of reactants and produces necessary for __?__.
the reaction to occur
mass to be conserved
electrolysis to occur
All of the following factors may speed up a chemical reaction except __?__.
smaller surface area
higher temperature
stirring/mixing
The distance traveled by an object divided by the time it takes to travel that distance (distance ÷ time) is called __?__.
average acceleration
average speed
activity
What must you know in order to calculate the speed of an object?
time
distance
both time and distance
What is the speed of an object at rest?
15 km/hr
0 km/hr
1 km/hr
The difference between speed and velocity is that velocity includes __?__.
direction
weight
distance
Which of the following DOES NOT indicate velocity?
Which of the following DOES NOT indicate velocity?
40 km/hr going from New York to New Jersey
28 km from LA to Catalina Island
Acceleration is defined as the change in velocity divided by what?
speed
final velocity
time
What is the SI unit for acceleration?
mph
m/s/s
ft/s/s
When the velocity of an object changes, it is acted upon by a __?__.
force
inertia
momentum
The combination of all of the forces acting on an object is called what?
total force
super force
net force
If the net force acting on a stationary object is zero, then the object will do what?
accelerate in the direction of the strongest force
remain stationary
begin moving backwards
If the net force on the object is zero, then the object has __?__ forces.
reaction
balanced
unbalanced
A tug-of-war that results in one team pulling the other across the line is an example of __?__.
reaction forces
reaction forces
unbalanced forces
Which of the following is the best example of balanced forces?
a rock falling to the ground
a stretched rubber band between two hands
a person walking around pushing a chair
Friction is defined as what?
the force that opposes motion between two surfaces that are touching
rate at which velocity changes
speed of an object in a specific direction
What is the friction between surfaces that are stationary called?
rolling friction
static friction
kinetic friction
What is the speed of an object at rest?
15 km/hr
0 km/hr
1 km/hr
Whenever an object is standing still. the value(s) that are always zero are __?__. (check all that apply)
speed
velocity
momentum
Weight is best described as __?__.
an object's resistance to acceleration
what causes an object to fall
the downward force exerted on objects due to gravity
When objects are moved further apart from each other, the force of gravity __?__.
increases
decreases
stays the same
Which law states that every object maintains constant velocity unless acted on by an unbalanced force?
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
Which law states that for every action force there is an equal and opposite reaction force?
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
Which law states that the unbalanced force acting on an object equals the object's mass times its acceleration?
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
The SI unit of force, named for the scientist who described the relationship between motion and force, is called the __?__.
newton
curie
einstein
When air resistance balances the weight of an object that is falling, velocity __?__.
slowly decreases
remains constant
rapidly increases
A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car?
200 N
200 J
0 J
What are the units for work?
N
J
m
What are the units of power?
watts
newtons
joules
A machine is a device that __?__.
A machine is a device that __?__.
increases energy
can multiply and change the direction of an input force
A first-class lever has the __?__.
fulcrum at one end and the output force between the fulcrum and the input force
fulcrum at one end and the input force between the fulcrum and the output force
fulcrum in the middle between the output force and the input force
Which of the following is NOT a simple machine?
a lever
a screw
a bicycle
Which of the following is an example of a wheel and axle?
a block and tackle
a screwdriver
a screwdriver
An inclined plane __?__.
changes the direction of the force only
changes the strength of the force only
changes both the strength and direction of the force
Energy of motion is known as __?__.
kinetic energy
potential energy
moving and shaking energy
