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WorksheetsScience 3-Revision
Total questions: 65
Worksheet time: 1hrs 8mins
How are sounds produced?
vibrating and moving objects
clapping hands and tapping feet
putting an object at a rest
1.Sound is a form of energy made by ____________
electricity
vibration
light
volume
Light travels in ______ lines
curve
straight
How does light allow us to see?
Light runs through objects and appears it in our brain.
Light hits an object and bends to a different direction.
Light hits an object and reflects back into our eyes.
Objects that emit their own light are called______.
light sources
non-light sources
reflectors
A mirror _________________ light.
absorbs
reflects
refracts
TRUE or FALSE:
A candle is a source of heat and light.
TRUE
FALSE
What behavior of light is shown in the picture?
Reflection
Refraction
What behavior of light is shown in the picture?
Reflection
Refraction
What is the best explanation for Mickey seeing himself in the mirror?
refraction
absorbed
reflection
flipped
Light absorbs easily into dark surfaces. Which object would absorb the most light?
black t-shirt
paper
window
tree
Heat energy transfer from low temperature objects to high temperature objects
True
False
Which of the following is an example of heat transfer by Radiation?
Burning your fingers on a hot iron.
Heat from a heater warming up your whole house
Standing by a campfire and feeling the heat.
All of the above.
Which of the following is an example of heat transfer by Radiation?
Burning your fingers on a hot iron.
Heat from a heater warming up your whole house
Standing by a campfire and feeling the heat.
All of the above.
It is the transfer of heat between substances that are in direct contact with each other.
Conduction
Convection
Radiation
Identify the mode of heat transfer in the given picture.
Conduction
Convection
Radiation
Identify the mode of heat transfer in the given picture.
(movement of water molecules)
Conduction
Convection
Radiation
Identify the mode of heat transfer in the given picture.
Conduction
Convection
Radiation
the path that an electric current takes
electrical circuit
static electricty
electric force
electric current
We need _________ to help us power electrical appliances.
Appliance
Electricity
Activity
A homebuilder wants to use renewable resources to produce energy to use in his new home. He installs large solar panels on his roof. Why is using solar panels in homes a good alternative to fossil fuels?
Fossil fuels are renewable and will never run out.
Solar panels can do more things than fossil fuels.
Solar are cheaper than fossil fuels.
Fossil fuels are nonrenewable resources and will eventually run out.
On a roller coaster, where is maximum potential energy?
At the top of a big hill
When going around a corner
When going upside down
Energy due to motion is ____________ energy.
Potential
Energy
Kinetic
__________ is stored energy.
Potential
Kinetic
None of the above
The boys are pulling with the same force. What will happen?
The boy in blue will win.
They will not move at all.
The boy in red will win.
Both will fall down.
Which of the following is an example of a balanced force?
An airplane taking off.
Kicking a football.
A car slowing down.
A car waiting at a red light.
Two boys are playing tug-of-war. They both pull on the rope and the rope moves to the left.
The forces are balanced.
The forces are unbalanced.
A woman is pushing the shopping cart and it is moving forward.
The forces are balanced.
The forces are unbalanced.
A soccer ball is on the ground. It is not moving. Are the forces acting on the ball balanced or unbalanced?
The forces acting on the ball are balanced.
The forces acting on the ball are unbalanced.
What are the unbalanced forces?
forces that are equal in size and opposite in direction.
forces that are not equal in size and are opposite in direction
If force is applied to an object on two sides, and that force is NOT the same, then the object will move in the direction of the greater force. Which type of force is responsible for this?
Balanced Force
Unbalanced Force
A type of force that acts when two surfaces rub together
Push
Pull
Friction
Force
Rough surfaces have less friction
True
False
Smooth surfaces have less friction
True
False
What will happen if you added water to the slide? Choose TWO answers.
There will be more friction
There will be less friction
You will go faster
You will go slower
A seesaw is an example of a
wedge
lever
inclined plane
pulley
The device used to raise a flag up a flag pole is an example of a
wheel and axle
lever
inclined plane
pulley
It changes the direction of the input force.
It changes the distance over which the input force is applied.
It changes the amount of the input force applied
It changes direction and increases the effect of your input force
Is this statement true or false?
When light hits an object, all of the light is absorbed
True
False
Which of the following uses electric energy to produce sound energy?
A drum
A speaker
A flute
Some light is………….. ,which is why we can see images of the sky on the water, but some light goes through the water and is……….when it enters.
refracted/reflected
reflected/ refracted
reflected/absorbed
refracted/absorbed
Dark objects…………..more light than objects with lighter colors.
absorb
reflect
refract
Combustion requires…………..to occur
oxygen
carbon dioxide
nitrogen
helium
An ………………… reduces the force needed to move an object to a higher elevation.
unbalanced force
inclined plane
magnet
pulley
A …………. uses a wheel and a rope or chain to change the direction of force and make lifting objects easier
(a)
