WorksheetsTerm 3 Grade Recovery (8th)
Total questions: 125
Worksheet time: 2hrs 48mins
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
diffraction
Deflection
reflection
all of these
Reflection
Refraction
Diffraction
The wave goes around something that gets in the way.
Reflection
Refraction
Diffraction
What would you call this?
Refraction
Diffraction
Bends
Reflection
In sound waves, the most dense area of dots is called ____ and the least dense areas is called _____
compression, rarefaction
rarefaction, compression
Wavelength
all of these
In a solid, sound waves travel _____ in a liquid.
faster than
slower than
the same as
all of these
Frequency is measured in _____
hertz
meters
decibels
meters/second
Refraction happens because the wave ____
changes speed as it changes mediums
changes speed as it changes directions
changes color as it changes mediums
the type of wave changes
Waves that need a medium are called
electromagnetic
light
mechanical
microwaves
When the car moves AWAY from you, its horn seems_____.
Low frequency
High frequency
greater amplitude
the same as when it is coming towards you
When an ambulance move TOWARD you it has a ________.
high frequency
low frequency
medium frequency
the same as when it moves away
Increasing the amplitude will increase the _____.
energy
frequency
wavelength
all of these
In space,you cannot hear because _____
there are no air molecules to carry sound.
the sounds o space are too loud
the sun destroys the sound waves
there is no magnetic field
Sound travels through all of these EXCEPT _____
water
helium
metal
vacuum

Which color of light will help this plant grow best?
Green light
Red Light
On the EMS, which wave has the shortest wavelength?
Radio
Gamma
Soft X-Rays
Ultraviolet
Which type of wave does sunscreen protect you from?
Radio
Infrared
Ultraviolet
Gamma
Visible light is which type of wave?
seismic
mechanical
longitudinal
electromagnetic
When light continues to pass through an object without changing its path
reflect
transmit
absorb
refract
The bending of waves around a barrier.
refraction
diffraction
resonance
What would you call this?
Reflection
Diffraction
Refraction
Friction
witch picture is diffraction
The location of an object in relation to a nearby object or place is called . . .
reference point
motion
position
frame of reference
A change in position is called . . .
position
frame of reference
reference point
motion
A push or pull on matter from all directions is called . . .
speed
velocity
acceleration
force
Forces that cause a change in motion are . . .
gravity
friction
balanced forces
unbalanced forces
Forces on an object that are equal in size & opposite direction, cancelling each other out, are called . . .
unbalanced forces
balanced force
friction
gravity
A force that opposes motion; can act between two objects that are touching, or between air & a moving object . . .
gravity
friction
balanced forces
unbalanced forces
Which type of friction is shown in the picture?
fluid
static
rolling
sliding
Segment O-A The bus is _________________.
at rest
returning (to original position)
moving forward
Segment A-B The bus is _________________.
at rest
returning (to original position)
moving forward
During which interval is the object speeding up?
A to B
B to C
D to E
E to F
What is represented by this graph?
constant speed
not moving
speed increasing
speed increasing at a constant rate
what is the motion described in the graph
all of above
constant speed
acceleration
constant position
The upward force on an object falling through the air is__________
air resistance
inertia
momentum
terminal velocty
If you increase the mass on an object while the force remains the same, its acceleration
decreases
stays the same
also increases
stops
If you increase the force on an object, its acceleration
decreases
stays the same
also increases
stops
Pushing a child on a swing is easier than pushing an adult on the same swing, because the adult has more mass.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
None of them
A rocket launches because of ______.
gravity
air resistance
an opposite reaction
If a car is moving fast and hits a wall, the wall will....
apply an equal and opposite force back on the car
allow the car to run through the wall
open up and swallow the car
Jupiter has about 317 times more mass than Earth. What can you infer from this fact?
That Jupiter’s and Earth’s gravitational forces are equal.
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
Mass has no effect on the gravitational force between two objects
