WorksheetsConservation of Energy
Total questions: 26
Worksheet time: 25mins
The Law of Conservation of Energy states:
Energy can created or destroyed but not transformed
Energy cannot be created or destroyed, it can only transformed
Energy can't be created, destroyed or transformed
Energy cannot be created or destroyed.
What kind of energy does an object possess when it's resting on top of the hill?
Potential Energy
Chemical Energy
Kinetic Energy
All of the above
What force causes a roller coaster cart to slow down the most?
friction
weight
gravity
air resistance
Which form of energy is represented in this image?
kinetic
thermal
potential
radiant
What happens when the ball goes from the highest position to the lowest position
PE and KE increases and decreases together
Impossible to know without knowing the mass of the object
the PE decreases while KE increases
Green plants?
Stretched bow and arrow?
Running?
Identify the correct energy transformation for the image below.
Chemical --> Radiant --> Thermal
Sound --> Thermal --> Radiant
Kinetic --> Potential --> Sound
Electrical --> Sound --> Thermal
What is the energy transformation that occurs in an electric pencil sharpener?
mechanical energy → electrical energy
electrical energy → kinetic energy
radiant energy → sound energy
chemical energy → kinetic energy
Which object shows an energy transformation from electrical → kinetic → sound?
What energy transformations take place when a battery-operated radio is in use?
Electrical → chemical → light
Sound → chemical → thermal
Chemical → electrical → sound
Light → electrical → thermal
What form of energy does a compressed spring have?
heat energy
kinetic energy
chemical energy
potential energy
What happens when a cold drink sits in a hot room?
It remains cold
It gets warmer
It starts boiling
It starts to freeze
When two things are the same temperature:
They have the same number of molecules
Their molecules stop moving
Their molecules move at the same average speed
Heat transfer between the two things stops
In this example, explain the movement of thermal energy in the glass.
Heat is moving from the lemonade to the glass
Heat is moving from the lemonade to the ice
Cold is moving from the ice to the lemonade
Cold is moving from the ice to the glass
Thermal energy always moves from areas of ______ heat to areas of ______ heat.
low -- high
high -- low
high -- high
low -- low
When matter moved from a solid to a liquid the molecules ____________.
Expand and slow down
Expand and become more dense
Expand and speed up
Contract and become more dense
When matter goes from a gas to a liquid, the molecules ____________.
Expand and slow down
Contract and slow down
Contract and speed up
Expand and speed up
