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Worksheets8th Grade Science Final Review
Total questions: 50
Worksheet time: 13hrs 30mins
The picture shows the properties of __________.
Metals
Non-metals
Metalloids
The picture shows the properties of __________.
Metals
Non-metals
Metalloids
The picture shows the properties of __________.
Metals
Non-metals
Metalloids
Which of the substances is a non-metal?
Sample A
Sample B
Sample C
What happens to the molecules when the substance goes from liquid to gas?
The molecules get closer together
The molecules lose energy
The molecules stay the same
The molecules gain energy
Which of the following is an example of a physical change of matter?
Melting
Combustibility
Reactivity
Conductivity
Which of the following is an example of a chemical change?
A marshmallow catching fire
A block of wood that is cut in half
Ice cream melting
Paper being folded into an airplane
Couch
Feather
They will both hit the ground at the same time
The feather will never hit the ground because of air resistance
A
B
C
D
Air resistance is stronger than gravity
Gravity is weaker than the normal force
Air resistance cancels out most of gravity's force
Friction is stronger than gravity
Which of the following is NOT a way to accelerate?
Speed Up
Slow Down
Change Direction
Add Mass
A
B
C
What is the net force of number 1?
5 N Down
5 N Right
5 N Left
0 N (Balanced)
What is the net force of number 2?
2 N Up
5 N Right
12 N
0 N (Balanced)
What is the net force of number 3?
3 N Down
6 N
5 N Down
0 N (Balanced)
What is the net force of number 4?
2 N up and 2 N right
10 N to the top right
5 N right and 2 N up
0 N (Balanced)
The definition of velocity is ______________.
Speed in a Direction
Acceleration plus direction
Slowing down
Speeding up
The energy of moving parts that can be used to push or pull an object is ____________________ energy.
Mechanical
Electrical
Thermal
Chemical
Moving electrons is ______________ energy.
Mechanical
Electrical
Thermal
Chemical
Energy of the heat in an object is _______________ energy.
Mechanical
Electrical
Thermal
Chemical
Energy in the molecular bonds of food, gas, batteries, burning wood, etc. is __________________ energy.
Mechanical
Electrical
Thermal
Chemical
The transfer of heat through a fluid (liquid or gas) caused by molecular motion is ___________________.
Convection
Conduction
Radiation
The transfer of heat or electric current from one substance to another by direct contact is ___________________.
Convection
Conduction
Radiation
Energy that is transmitted in the form of rays or waves or particles is ___________________.
Convection
Conduction
Radiation
Electrical Energy
Kinetic Energy
Chemical Energy
Potential Energy
How does heat move?
From hot to cold
From cold to hot
Whichever way has the most energy
In all directions regardless of energy
At the lowest part of the track
At the top of the loops
At the left of the picture
At the right of the picture
Which of the following waves is most directly responsible for sunburns?
Radio Waves
Microwaves
Gamma Rays
Ultraviolet Waves
Which of the following waves has the highest frequency?
X-Rays
Ultraviolet Rays
Infrared Rays
Visible Light
Which of the following waves has the largest wavelength?
Radio Waves
Microwaves
Visible Light
Gamma Rays
Sound Waves
Seismic Waves
Ocean Waves
Microwaves
Compressional Waves
Microwaves
Electromagnetic Waves
Ultraviolet Waves
Which of the following is most related to wavelength?
Distance
Speed
Pitch
Volume
If frequency increases, what happens to wavelength?
Wavelength gets larger
Wavelength gets shorter
Wavelength gets taller (More amplitude)
Wavelength gets shorter (Less amplitude)
An echo reflects best on which kind of surface?
Soft and smooth
Soft and rough
Firm and smooth
Firm and rough
The height from the rest position to the crest, or from the rest position to the trough is _______________.
Amplitude
Frequency
Wavelength
Pitch
Which of the following is not a mechanical wave?
Music playing from a speaker
A Microwave heating up food
An earthquake
Ocean waves
Sound travels fastest through __________.
Solids
Liquids
Gases
Sound travels fastest through solid objects
Sound can be blocked by cloud cover
Sound doesn't reflect, so it gets caught by trees and rocks
This is just "movie magic"
As an object that emits sound moves past a stationary point, the sound changes pitch due to the frequency of the sound. This is called __________.
Frequency distortion
Doppler effect
SONAR echoes
Radiation movement
Waves change speed as they move from one medium to another. This causes the image to appear slightly distorted, as the light reaches your eyes at different times. What is this effect called?
Refraction
Reflection
Echo
Angle of Incidence
This image shows an object that is ________.
Transparent
Translucent
Opaque
This image shows an object that is ________.
Transparent
Translucent
Opaque
This image shows an object that is ________.
Transparent
Translucent
Opaque
Where are magnetic fields the strongest?
The middle of a magnet
At the South pole of a magnet
At the North pole of a magnet
At both poles of a magnet
Insulators allow charges to flow freely, conductors do not
Conductors allow charges to flow freely, insulators do not
Insulators and conductors both allow charges to move freely
Insulators and conductors both do not allow charges to move
Which of the following statements is correct?
Positive and Negative charges attract
Positive and Positive charges attract
Negative and Negative charges attract
Positive and Negative charges repel
Which of the following is good at conducting electricity?
Plastic
Metal
Rubber
Styrofoam
This is a picture of electricity producing _____________.
Chemical energy
a Magnetic field
a Positive charge
a Negative charge
An electric charge can produce a magnetic field, but a magnetic field CANNOT produce an electric charge.
True
False
