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WorksheetsMr. Putman's 8th Grade Science 2nd Semester Exam
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
Speed is the rate of change in ____
a)
velocity
b)
time
c)
direction
d)
distance
2.
To describe velocity you need to know ____.
a)
speed and direction
b)
speed and time
c)
direction and acceleration
d)
speed and acceleration
3.
Acceleration involves a change in ____.
a)
time
b)
direction
c)
speed
d)
both b and c
4.
Acceleration is a change in ____.
a)
speed
b)
velocity
c)
displacement
d)
position
5.
Inertia ____.
a)
depends on direction
b)
depends on momentum
c)
resists a change in motion of an object
d)
both a and b
6.
The distance traveled divided by the time taken to travel the distance is ____.
a)
average speed
b)
mass
c)
momentum
d)
speed
7.
Forces that are equal in size but opposite in direction are ____.
a)
balanced forces
b)
frictional forces
c)
inertial forces
d)
net forces
8.
Newton's first law of motion states that an object remains at rest unless a ____ force acts on it.
a)
balanced
b)
frictional
c)
gravitational
d)
net
9.
The force you have to overcome to start an object moving is ____.
a)
rolling friction
b)
static friction
c)
sliding friction
d)
air resistance
10.
The relationship among force, mass, and acceleration is stated in ____.
a)
the law of conservation of momentum
b)
Newton's first law of motion
c)
Newton's second law of motion
d)
Newton's third law of motion
11.
A feather falls through the air more slowly than a brick because of ____.
a)
gravity
b)
air resistance
c)
inertia
d)
momentum
12.
The statement "for every action, there is an equal but opposite reaction" is a statement of
a)
the law of conservation of momentum
b)
Newton's first law
c)
Newton's second law
d)
Newton's third law
13.
If an object sinks in a fluid, the buoyant force is ____ the weight of the object.
a)
greater than
b)
less than
c)
the same as
d)
doesn't apply
14.
Density is given in ____.
a)
Pa/cm3
b)
N/m2
c)
g/s2
d)
g/cm3
15.
According to Archimedes, the buoyant force on an object is equal to ____.
a)
the weight of the object
b)
the fluid pressure on the object
c)
the density of the fluid
d)
the weight of the fluid displaced
16.
If you squeeze the bottom of a closed tube of toothpaste, the pressure is increased ____.
a)
on the bottom of the tube
b)
on the top of the tube
c)
on the sides of the tube
d)
everywhere in the tube
17.
When you see a change in the environment you know that ____ has been transferred.
a)
energy
b)
force
c)
heat
d)
motion
18.
When a rubber band is stretched, it has ____ energy.
a)
potential
b)
kinetic
c)
chemical
d)
nuclear
19.
The form of energy in fossil fuels is ____ energy.
a)
nuclear
b)
chemical
c)
radiant
d)
electrical
20.
A photovoltaic converts ____ energy.
a)
electrical to radiant
b)
chemical to electrical
c)
radiant to thermal
d)
radiant to electrical
21.
A slanted surface used to raise an object is a(n)____.
a)
efficiency board
b)
effort ramp
c)
incline plane
d)
wedge
22.
A device that does work with only one movement and changes the size or direction of a force is a(n) ____.
a)
compound machine
b)
effort machine
c)
screw
d)
simple machine
23.
A bar that is free to pivot about a fixed point is a ____.
a)
fulcrum
b)
lever
c)
ramp
d)
wedge
24.
The rate at which work is done is called ____.
a)
efficiency
b)
effort time
c)
force
d)
power
25.
The amount by which a machine multiplies an input force is called the ____.
a)
efficiency factor
b)
fulcrum
c)
machanical advantage
d)
resistance force
26.
An inclined plane with one or two sloping sides forms a machine called a ____.
a)
pulley
b)
lever
c)
ramp
d)
wedge
27.
An inclined plane wrapped around a cylinder post is a ____.
a)
lever
b)
ramp
c)
screw
d)
wedge
28.
When two or more simple machines work together, they are called a(n) ____.
a)
compound machine
b)
effort machine
c)
screw
d)
simple machine
29.
A place where molecules are far apart is a ____.
a)
refraction
b)
reflection
c)
rarefaction
d)
compression
30.
When light bounces off a surface it is called ____
a)
reflection
b)
refraction
c)
diffraction
d)
interference
31.
To produce sound, an object must be ____.
a)
moving towards the listener
b)
heated
c)
in a gas
d)
vibrating
32.
Sound travels fastest in a ____.
a)
solid
b)
liquid
c)
gas
d)
both a and b
33.
The most diffraction occurs when a wave is ____ the size of the opening.
a)
greater than
b)
less than
c)
the same size as
d)
both a and b
34.
You can hear sound around an open door because sound waves ____.
a)
refract
b)
reflect
c)
diffract
d)
diffuse
35.
Resonance can be used to ____ sound.
a)
change the pitch of
b)
reduce
c)
reverberate
d)
amplify
36.
A combination of sounds with distinct pitches and a specific pattern is ____.
a)
constructive interference
b)
white noise
c)
music
d)
beats
37.
The lowest frequency produced by a vibrating string is the ____ frequency.
a)
natural
b)
resonator
c)
basic
d)
fundamental
38.
Most musical instruments have something that vibrates linked to a ____.
a)
voice box
b)
resonator
c)
hollow tube
d)
membrane
39.
Reverberation in concert halls is caused by ____.
a)
diffraction
b)
refraction
c)
diffusion
d)
reflection
40.
The number of waves that pass a certain point in one second is the wave’s ____.
a)
frequency
b)
amplitude
c)
wavelength
d)
intensity
41.
A wave transfers ____.
a)
energy
b)
matter
c)
vibrating electric charges
d)
electromagnetic energy
42.
Electromagnetic waves are produced by ____.
a)
postive and negative charges
b)
magnetic fields
c)
charged particles in motion
d)
electromagnetic energy
43.
Vibrating charged particles make ____ fields.
a)
electric
b)
magnetic
c)
radio
d)
both a and b
44.
Electromagnetic waves ____.
a)
are compressional waves
b)
carry radiant energy
c)
must have a medium
d)
are generated by static electricity
45.
Television uses ____ to transmit signals.
a)
mircowaves
b)
radio waves
c)
ultraviolet waves
d)
inferred wave
46.
The buildup of electric charges on an object is called a ____.
a)
circuit charge
b)
current circuit
c)
static charge
d)
current charge
47.
One example of a good conductor is ____.
a)
copper
b)
wood
c)
glass
d)
rubber
48.
The separation of positive and negative charges due to electric field is called a(n) ____.
a)
static charge
b)
current charge
c)
series circuit
d)
induced circuit
49.
Resistance is measured in a unit called the ____.
a)
ampere
b)
watt
c)
ohm
d)
volt
50.
A path created for a current that allows only one route for the current is called a ____.
a)
parallel circuit
b)
parallel current
c)
series circuit
d)
series current
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