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8th Grade Physical Science Final REVIEW Flashcards | StudBud
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8th Grade Physical Science Final REVIEW
8th Grade Physical Science Final REVIEW
45 terms
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A review game of pretty much everything we covered this year...
Flashcards
45 cards
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Practice quiz
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Host live
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Questions
45
Answers
1
The rate at which work is done is called
efficiency.
output force.
mechanical advantage.
power.
2
New substances always form when matter undergoes a(n) ______ change.
physical
chemical
thermal
electrical
3
The energy associate with the position and motion of an object is
thermal energy.
potential energy.
nuclear energy.
mechanical energy.
4
Newton's third law states that for
forces always add together.
for every action, reactions are stronger.
every action, there's an equal but opposite reaction.
forces always act against each other.
5
When an unbalanced force acts on an object, the force
changes the motion of the object.
is equal to the weight of the object.
cancels another force.
doesn't change the motion of the object.
6
Fossil fuels store energy from the sun as
thermal energy.
electromagnetic energy.
chemical energy.
mechanical energy.
7
Air resistance is a type of
fluid friction.
sliding friction.
rolling friction.
static friction.
8
You can balance a chemical equation by changing the
Subscripts
Reactants
Products
Coefficients
9
The key to reducing air pollution is reducing _______.
air
people
emissions
water
10
A ____________ observation doesn't involve numbers or measurements.
quantitative
qualitative
mathematical
scientific
11
The energy stored in the nucleus of an atom is
electrical energy
chemical energy
nuclear energy
electromagnetic energy
12
A substance with a definite shape and volume is called a(n)
solid
plasma
liquid
gas
13
Horizontal rows in the periodic table are called _______.
columns
families
periods
groups
14
The equation used to calculate density is:
D= v x m
D= V/m
D= m/V
D= m + V
15
What is this called?
Erlenmeyer Flask
Erlenmeyer Beaker
Beaker
Graduated Cylinder
16
Unlike metals, many nonmetals are
solid at room temperature.
gases at room temperature.
shiny.
malleable and ductile.
17
Energy taken in during a chemical reaction is called ________ energy.
enthropic
exothermic
endothermic
exotic
18
The distance an object travels in a period of time is its
speed.
velocity.
acceleration.
direction.
19
If you know that a storm is traveling 30mph to the southeast, then you know its
velocity.
distance.
time.
constant speed.
20
The atomic ______ is the mass of the protons and the neutrons in the nucleus, added together.
number
mass
name
solution
21
What do we call the facts, figures, & other evidence gathered through observations?
prototypes
proof
data
constraints
22
In the modern periodic table, elements are arranged in order of increasing atomic _______.
solution.
mass.
compound.
number.
23
What makes a scientific question/hypothesis valid?
It must be testable and free of opinion.
It must be a complete sentence and science-related.
It must be biased and have meaning.
It must have a verb and a noun and be opinionated.
24
A change in position with respect to a reference point is
velocity.
acceleration.
direction.
motion.
25
Energy of motion is called
elastic potential energy.
kinetic energy.
gravitational potential energy.
chemical energy.
26
A scientific _______ is a well-tested explanation for a wide range of observations.
question
theory
hypothesis
law
27
Solar energy is a _________ source of energy, because as long as we are alive, we'll have it.
monopolizing
nonrenewable
unending
renewable
28
_______ is the process of burning fossil fuels.
combustion.
sublimation.
mechanical energy.
evaporation.
29
Which of the following is NOT a physical property?
ability to conduct electricity
melting point
ability to catch fire
flexibility
30
A shuttle lifting off into space is a great example of Newton's _____ Law.
Fourth
Third
Second
First
31
The rate at which velocity changes is called
constant speed.
velocity squared.
speed.
acceleration.
32
The law of conservation of momentum states that when two objects collide,
the total momentum is tripled.
the total momentum doubles.
the total momentum doesn't change.
the total momentum is lost.
33
A substance with a definite volume, but no definite shape is called a
liquid
solid
plasma
gas
34
The atomic number of an atom is determined by the number of _______.
ions
electrons
protons
neutrons
35
Newton's first law states that an
objects colliding in space sometimes explode.
object in motion stops if the wind picks up.
object at rest will never be moved.
object in motion stays in motion unless acted on by a force.
36
When you stretch a rubber band, you give it
gravitational potential energy.
chemical energy.
elastic potential energy.
kinetic energy.
37
_______ are mixtures of two or more elements, one of which is always a metal.
Compounds
Solutions
Isotopes
Alloys
38
The resistance of an object to any change in its motion is its
friction
weight
inertia
mass
39
Which of the following is not a projectile?
a thrown ball
an acorn on the ground
a soaring arrow
a satellite
40
Neutrons are _______.
made-up
negative
positive
neutral
41
The law of conservation of energy states that
energy can never be changed.
no two forces are ever the same.
you should always add together like forces.
when one energy is transformed into another, none is lost.
42
You do not know an object's velocity until you know its
acceleration.
speed and distance.
speed and reference point.
speed and direction.
43
____ is anything that has mass and takes up space.
Density
Matter
Gravity
Weight
44
When balancing a chemical equation, the number of atoms on the left must...
Be lower than the number on the right.
Be higher than the number on the right.
Be the same as the number of atoms on the right.
Be different than the number on the right.
45
The _____ of an object changes if the force of gravity on the object changes.
length
matter
weight
mass
