Conservation of energy

Target Language or Knowledge:

Match the pairs below:
electrical energy to sound energy → CD player, electrical energy to thermal energy → stove element, electrical energy to light energy → spotlight, electrical energy to kinetic energy → blender, elastic energy to kinetic energy → wind-up toy, chemical energy to light energy → torch, electrical energy to chemical energy → battery charger, electrical energy to infrared energy → remote control
Decide whether the following statement is true or false. Energy stored in objects is not visible.
True
In an energy transformation only one new type of energy will be produced.
False
In an energy transformation the energy input will always be greater than the energy output.
True
In an energy transformation the energy output can be of the same type as the energy input.
True
Energy chains can vary in the number of transformations that occur.
True
Energy is never created out of nothing nor can it be destroyed.
True
Complete these stories
When your car is moving it has _kinetic_ energy. This energy comes from the burning of petrol in the motor. The petrol contains stored _potential_ energy. This petrol was refined from oil. The chemicals in oil were originally produced by microscopic plants which lived in the sea. These plants obtained their energy from _radiant_ energy coming from the Sun.
Fill the blanks below:
When we have finished exercising in the gym, our bodies are hot because of the _thermal_ energy transformed from the _kinetic_ energy associated with moving. The energy to make our muscles move comes from the _chemical_ energy stored in food. The energy in food originally came from plants (or animals that ate plants). The plants obtained their energy from _light_ energy.
Fill the blanks below:
When you play a CD, _sound_ energy reaches your ears. This energy came from _electrical_ energy which flowed to your house from a power station. The electricity was generated from _kinetic_ energy as water raced down the pipes from the top of the dam.
Match the pairs below:
energy given out in an event or by a machine → energy output , energy stored in an object or substance → potential energy , energy cannot be created, lost or destroyed → Law of Energy, unit of energy → joule, 1 joule of energy used or produced per second → a watt
Complete the Law of Energy Conservation below
a) Energy _cannot_ be created out of _nothing._ b) Energy _can_ be changed into _different_ types but the _ total_ amount of energy remains _constant_ . c) Energy can never be _destroyed_