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Worksheets8th Grade Second Semester Science Smackdown
Total questions: 130
Worksheet time: 1hrs 5mins
Name
Class
Date
1.
The characteristics of a substance that can be observed or measured without changing the substance
a)
physical properties
b)
chemical properties
c)
chemical change
d)
reactivity
2.
The amount of matter in an object
a)
volume
b)
density
c)
mass
d)
flammability
3.
The amount of space an object takes up.
a)
mass
b)
volume
c)
density
d)
flammability
4.
The ability of an object to transfer heat or electricity to another object.
a)
boiling point
b)
conductivity
c)
melting point
d)
solubility
5.
The temperature at which a liquid changes to a gas.
a)
conductivity
b)
boiling point
c)
melting point
d)
solubility
6.
The temperature at which a solid changes to a liquid
a)
conductivity
b)
boiling point
c)
melting point
d)
solubility
7.
How tightly packed the matter in a substance is.(mass/volume)
a)
mass
b)
volume
c)
density
d)
flammability
8.
A material's ability to burn in the presence of oxygen
a)
reactants
b)
oxidation
c)
reactivity
d)
flammability
9.
How readily a substance combines chemically with other substances.
a)
product
b)
oxidation
c)
reactivity
d)
flammability
10.
a change that produces matter with different physical and chemical properties
a)
chemical change
b)
physical change
c)
reactivity
d)
flammability
11.
Matter is not created nor destroyed in any chemical or physical change
a)
Law of Conservation of Mass
b)
Law of Conservation of Energy
c)
reactants
d)
products
12.
the process by which one or more substances change to produce one or more different substances
a)
Law of Conservation of Mass
b)
Law of Conservation of Energy
c)
chemical reaction
d)
products
13.
Energy cannot be created or destroyed in a chemical reaction
a)
Law of Conservation of Mass
b)
Law of Conservation of Energy
c)
chemical reaction
d)
products
14.
Starting materials in a chemical reaction
a)
Law of Conservation of Mass
b)
Law of Conservation of Energy
c)
reactants
d)
products
15.
Ending materials in a chemical reaction
a)
Law of Conservation of Mass
b)
Law of Conservation of Energy
c)
reactants
d)
products
16.
Energy stored in chemical bonds
a)
chemical potential energy
b)
endothermic reaction
c)
exothermic reaction
d)
subscript
17.
The mass of X is _______________ Y.
a)
Greater than
b)
Less than
c)
Equal to
d)
Not enough information is given
18.
The volume of X is _______________ Y.
a)
Greater than
b)
Less than
c)
Equal to
d)
Not enough information is given
19.
The density of X is _______________ Y.
a)
Greater than
b)
Less than
c)
Equal to
d)
Not enough information is given
20.
Choose the correct answer to describe the reaction.
a)
endothermic reaction
b)
exothermic reaction
c)
not enough information to tell
21.
Choose the correct answer to describe the reaction.
a)
endothermic reaction
b)
exothermic reaction
c)
not enough information to tell
22.
Any product that exists that comes from a plant, animal, or the earth
a)
science
b)
material
c)
polymer
d)
natural material
23.
A material obtained from a natural material that has undergone a chemical reaction
a)
science
b)
synthetic material
c)
polymer
d)
natural material
24.
The practical use of scientific knowledge, especially for industrial or commercial use
a)
science
b)
synthetic material
c)
technology
d)
natural material
25.
Flexible fabric that can be spun (polyester, rayon, nylon)
a)
ceramics
b)
synthetic fiber
c)
technology
d)
natural material
26.
Properties of a material can determine its behavior and what else?
a)
it's formula
b)
how it's used
c)
it's sustainability
d)
natural science
27.
Which is a characteristic of a synthetic material?
a)
Climate
b)
Environment
c)
Made from natural resources
d)
Undergoes a physical change
28.
The starting point you choose to describe the location or position of an object.
a)
initial point
b)
reference point
c)
position
d)
velocity
29.
An object's distance in a certain direction from a reference point.
a)
displacement
b)
position
c)
direction
d)
speed
30.
The difference between the starting position and the final position.
a)
velocity
b)
directional speed
c)
displaysia
d)
displacement
31.
A measure of the distance an object travels in a given amount of time.
a)
velocity
b)
displacement
c)
speed
d)
meters
32.
The speed and direction of a moving object.
a)
displacement
b)
vector
c)
velocity
d)
initial position
33.
A quantity that has both magnitude and direction
a)
displacement
b)
vector
c)
velocity
d)
Reference point
34.
To describe your position, you must state your _____________relative to a certain point
a)
displacement
b)
speed
c)
direction
d)
location
35.
A complete description of position includes the following three things
a)
distance, direction, speed
b)
distance, displacement, reference point
c)
distance, direction, reference point
d)
speed, direction, reference point
36.
What is the process of changing position?
a)
motion
b)
speed
c)
displacement
d)
velocity
37.
Which describes the position of an object in two dimensions?
a)
4 in. down and 8 in. up
b)
10 ft up and 8 ft to the left
c)
5 miles north and 2 miles south
d)
20 cm to the left and 10 cm to the right
38.
GPS stands for
a)
Global Positioning Satellites
b)
Global Position to Stars
c)
Global Positioning System
d)
Global Points of Reference
39.
A train travels from west to east through your town every night at 9pm. One night the train doesn't come through. You learn that it had derailed the night before, 10 miles before it reached your town.
Using your town as a reference point, which option describes the position of the accident with respect to your town's location?
a)
10 miles west
b)
10 miles east
c)
-10 miles
d)
+10 miles
40.
Use the formula for Average Speed (distance/time) to solve the following: An airplane flew from Los Angeles to New York City. The plane traveled 2400 km in 3.2 hours. What was the SPEED during this time period?
a)
800 km/h
b)
750 km/h
c)
850 km/h
d)
700 km/h
41.
Choose the statement that describes motion in the image.
a)
The boat is in motion relative to the buoy.
b)
The man is not in motion relative to the buoy.
c)
The man is in motion relative to the boat.
d)
The boat is in motion relative to the man.
42.
In the picture of the soccer field, where is the goal located in reference to center field (point B)?
a)
40 m to the left
b)
50 m to the right
c)
50 m to the left
d)
10 m behind the goalie
43.
What is the total distance that the Dread Pirate Roberts must travel to reach Leadbelly's Treasure?
a)
35 paces
b)
31 paces
c)
31 m
d)
35 m
44.
What is the total displacement of the Dread Pirate Roberts once he reaches Leadbelly's Treasure? (Remember: a²+b²=c²)
a)
11.2 m
b)
125 m
c)
31.3 m
d)
35 m
e)
35 paces
45.
A push or a pull on an object
a)
velocity
b)
force
c)
net force
d)
unbalanced force
46.
Moving an object toward you
a)
push
b)
pull
c)
net force
d)
motion
47.
Moving an object away from you
a)
push
b)
pull
c)
net force
d)
motion
48.
a push or pull on one object by another that is touching it
a)
contact force
b)
acceleration
c)
net force
d)
unbalanced force
49.
Total amount of force acting on an object
a)
contact force
b)
force
c)
net force
d)
unbalanced force
50.
A force that causes a change in the object's velocity (in motion)
a)
contact force
b)
force
c)
net force
d)
unbalanced force
51.
A change in speed or direction
a)
acceleration
b)
velocity
c)
lubricant
d)
unbalanced force
52.
Speed with direction
a)
acceleration
b)
velocity
c)
lubricant
d)
unbalanced force
53.
A substance that reduces friction
a)
acceleration
b)
velocity
c)
lubricant
d)
unbalanced force
54.
Force =
a)
mass / acceleration
b)
mass x acceleration
c)
distance x time
d)
distance / time
55.
Speed =
a)
mass / acceleration
b)
mass x acceleration
c)
distance x time
d)
distance / time
56.
Acceleration =
a)
mass / acceleration
b)
force / mass
c)
distance x time
d)
force x mass
57.
Choose THREE ways that acceleration can be changed
a)
Speed up
b)
Slow down
c)
Change direction
d)
Move sideways
e)
Move backwards
58.
Which way will the cart of candy move?
a)
left
b)
right
c)
it will stay in the same place
59.
Which way will the cart of candy move?
a)
left
b)
right
c)
it will stay in the same place
60.
A snowmobile applies a force of 2000 N as it starts to move. It accelerates at 5 m/s². What is its mass in kg?
a)
400 kg
b)
1000 kg
c)
10,000 kg
d)
500 kg
61.
A 2022 Mazda CX5 accelerates with a force of 132,000N. The friction resistance is 2000N. What is its Fnet? (WRITE THE NUMBER ONLY)
(a)
62.
The Mazda CX5 has a mass of 1700 kg. Using Fnet, and its mass, calculate how fast it is accelerating.
a)
76.5 m/s²
b)
3,400,000 m/s²
c)
36.3 m/s²
d)
77.6 m/s²
63.
forces pushing in completely different directions or positions
a)
force pair
b)
opposing forces
c)
normal force
d)
collision force
64.
The forces two objects apply to each other.
a)
force pair
b)
opposing forces
c)
normal force
d)
collision force
65.
force that pushes perpendicular to the object's surface.
a)
force pair
b)
opposing forces
c)
normal force
d)
collision force
66.
When one object collides with another object, a force is applied to the second object.
a)
force pair
b)
opposing forces
c)
normal force
d)
collision force
67.
When objects collide and bounce off each other
a)
elastic collision
b)
perpendicular
c)
inelastic collision
d)
attractive
68.
lines that form right angles
a)
elastic collision
b)
perpendicular
c)
inelastic collision
d)
attractive
69.
When objects collide and stick together
a)
elastic collision
b)
perpendicular
c)
inelastic collision
d)
opposing force
70.
The image below is shown BEFORE collision. Based upon your knowledge of force and collision. Choose the correct AFTER picture.
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
71.
a force of attraction between two masses
a)
gravity
b)
mass
c)
weight
d)
attractive
72.
Objects that affect one another
a)
gravity
b)
interacting objects
c)
weight
d)
force
73.
A push or pull exerted on an object
a)
Newton
b)
interacting objects
c)
weight
d)
force
74.
a force that one object can apply to another object without touching it
a)
noncontact force
b)
field
c)
model
d)
interacting objects
75.
a region of space that has a physical quantity at every point
a)
noncontact force
b)
field
c)
model
d)
interacting objects
76.
a representation of an object or event
a)
noncontact force
b)
field
c)
model
d)
interacting objects
77.
As a Space X rocket blasts into space to orbit earth, where will it have to work the hardest to overcome gravity?
a)
at initial launch
b)
2 miles up in the sky
c)
once it begins earth orbit
d)
when it starts to return to earth
78.
The model below represents a star orbited by two planets, Planet A and Planet B. The star is also orbited by a mysterious object, Object X. The star is the most massive object, followed by Planet B, Planet A, and then Object X.
In the model below, which satellite will have the weakest gravity?
a)
Planet A
b)
Planet B
c)
Object X
79.
weight =
a)
mass x gravitational acceleration
b)
length x width
c)
mass / gravitational acceleration
d)
mass x volume
80.
Kinetic or potential energy associated with the motion or position of an object
a)
kinetic energy
b)
mechanical energy
c)
Law of Conservation of Energy
d)
elastic potential energy
81.
Energy of motion
a)
elastic potential energy
b)
Law of Conservation of Energy
c)
mechanical energy
d)
kinetic energy
82.
Energy that is stored and held in readiness
a)
potential energy
b)
Law of Conservation of Energy
c)
mechanical energy
d)
kinetic energy
83.
The energy of stretched or compressed objects
a)
elastic potential energy
b)
Law of Conservation of Energy
c)
work
d)
kinetic energy
84.
Energy cannot be created or destroyed, only changed
a)
Law of Momentum
b)
Law of Conservation of Energy
c)
Law of Thermodynamics
d)
Law of Kinetic Energy
85.
The ability to cause change
a)
work
b)
energy
c)
mass
d)
velocity
86.
Force exerted on an object that causes it to move in the direction of the force
a)
mass
b)
work
c)
energy
d)
velocity
87.
Movement of thermal energy from an area of high temperature to an area of low temperature
a)
potential energy transfer
b)
thermal energy transfer
c)
thermal insulation
d)
velocity
88.
A system in which no matter or energy is allowed to enter or leave
a)
potential energy transfer
b)
thermal energy transfer
c)
closed system
d)
open system
89.
A system in which matter or energy can enter from or escape to the surroundings.
a)
potential energy transfer
b)
thermal energy transfer
c)
closed system
d)
open system
90.
Potential energy that depends on the height of an object
a)
potential energy transfer
b)
thermal energy transfer
c)
gravitational potential energy
d)
kinetic energy
91.
A baseball has _____________ kinetic energy than a tennis ball traveling at the same speed because the baseball has a greater _____________ .
a)
less, mass
b)
more, velocity
c)
more, mass
d)
less, velocity
92.
What would you expect bounce #5 to look like?
a)
shorter than 4
b)
the same as 4
c)
the same as 3
d)
the same as 2
93.
What kind of system is this ball in?
a)
open system
b)
closed system
c)
isolated system
d)
untouched system
94.
an object that attracts iron and other materials that have magnetic qualities similar to iron.
a)
electromagnet
b)
magnet
c)
magnetic pole
d)
magnetic force
95.
things that are always magnets, no matter what
a)
electromagnet
b)
permanent magnet
c)
temporary magnet
d)
magnetic force
96.
a force of attraction or repulsion created by a magnet.
a)
electromagnet
b)
magnet
c)
magnetic pole
d)
magnetic force
97.
the place on a magnet where the force it exerts is the strongest.
a)
magnetic potential energy
b)
Law of Conservation of Energy
c)
mechanical energy
d)
magnetic pole
98.
region in a magnetic material in which the magnetic fields of the atoms all point in the same direction.
a)
magnetic potential energy
b)
magnetic domain
c)
electric field
d)
magnetic pole
99.
What will happen to the magnets in the picture?
a)
They will repel, or push each other apart
b)
They will attract, or pull each other together
c)
They will not move
d)
They will attract then repel
100.
What will happen to the magnets in the picture?
a)
They will repel, or push each other apart
b)
They will attract, or pull each other together
c)
They will not move
d)
They will attract then repel
101.
Where is the magnetic field strongest on a bar magnet?
a)
At the poles
b)
In the middle
c)
On the blue side
d)
On the red side
102.
the invisible region around a charged object where an electric force is applied.
a)
electric field
b)
electrically charged
c)
electrically neutral
d)
induction
103.
the condition of having an unbalanced amount of positive charge or negative charge.
a)
electric field
b)
electrically charged
c)
electrically neutral
d)
induction
104.
charging an object without touching it.
a)
electric field
b)
electrically charged
c)
electrically neutral
d)
induction
105.
While doing laundry, Bertha pulls clothes from the dryer. Some socks cling to a blanket. Which statement explains why the socks cling to the blanket?
a)
The socks and blanket dried together which caused them tot cling to each other
b)
The socks and blanket are conductors that picked up some positive charges that keep the clothes together
c)
The socks and blankiet are insulators that picked up some negative charges that keep the clothes together.
d)
The clothes picked up opposite charges. The opposite charges are attracted to each other.
106.
While doing laundry, Bertha pulls clothes from the dryer. Some socks cling to a blanket. What solution would reduce this problem in the dryer?
a)
A crinkled-up ball of aluminum foil will conduct the charges and remove the charges from the clothes.
b)
Place less clothes in the dryer to prevent rubbing
c)
Lower the electricity the dryer uses to lower the number of charges in the dryer.
d)
Dry clothes without them touching so that the clothes do not dry together.
107.
a material through which electrons cannot easily move.
a)
electric insulator
b)
conduction
c)
closed circiut
d)
open circuit
108.
the transfer of charged particles between two conductors.
a)
electric insulator
b)
conduction
c)
closed circiut
d)
open circuit
109.
circuit is complete and electric energy flows through the circuit.
a)
electric insulator
b)
conduction
c)
closed circiut
d)
open circuit
110.
a circuit that is not complete and no electric energy flows through the circuit.
a)
electric insulator
b)
conduction
c)
closed circiut
d)
open circuit
111.
the movement of electrically charged particles.
a)
voltage
b)
current
c)
closed circiut
d)
open circuit
112.
the electrical potential energy difference between two places on an electric circuit.
a)
voltage
b)
current
c)
closed circiut
d)
open circuit
113.
a magnet created by wrapping a current-carrying wire around a ferromagnetic core.
a)
electromagnet
b)
electric motor
c)
electric generator
d)
direct generator
114.
a device that uses an electric current to produce motion.
a)
electromagnet
b)
electric motor
c)
electric generator
d)
direct generator
115.
a device that uses a magnetic field to transfer mechanical energy to electric energy.
a)
electromagnet
b)
electric motor
c)
electric generator
d)
direct generator
116.
an electric current that continually flows in one direction.
a)
electromagnet
b)
magnetic field
c)
alternating current
d)
direct current
117.
an electric current that changes direction in a regular pattern.
a)
electromagnet
b)
magnetic field
c)
alternating current
d)
direct current
118.
The area of magnetic force around a magnet
a)
electromagnet
b)
magnetic field
c)
alternating current
d)
direct current
119.
What is this a picture of?
a)
electromagnet
b)
electric motor
c)
electric generator
d)
direct current
120.
Which condition is true for ALL light bulbs to be lit?
a)
Switch B and C closed
b)
Switch A closed, B and C open
c)
Switch B closed, A and C open
d)
All switches closed
121.
What part of a mechanical wave is shown by letter A?
a)
wavelength
b)
amplitude
c)
crest
d)
trough
122.
What part of a mechanical wave is shown by letter B?
a)
wavelength
b)
amplitude
c)
crest
d)
trough
123.
What part of a mechanical wave is shown by letter C?
a)
wavelength
b)
amplitude
c)
crest
d)
trough
124.
What part of a mechanical wave is shown by letter D?
a)
wavelength
b)
amplitude
c)
crest
d)
trough
125.
The SI unit used to measure frequency is _______.
a)
hertz
b)
speed
c)
voltage
d)
amps
126.
As the frequency of a sound wave increases, the pitch __________.
a)
creates a chemical reaction
b)
stays the same
c)
decreases
d)
increases
127.
Allowing light to pass through while an image beyond is seen clearly.
a)
opaque
b)
radiant
c)
transparent
d)
translucent
128.
Allowing light to pass through while an image beyond is blurry.
a)
opaque
b)
radiant
c)
transparent
d)
translucent
129.
This type of waves have the longest wavelength and are in position #1 on the electromagnetic spectrum.
a)
gamma rays
b)
visible light
c)
radio waves
d)
x-rays
130.
This type of wave (#3) are just below visible light, and night vision technology uses this type of wave.
a)
gamma rays
b)
infrared
c)
radio waves
d)
x-rays
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