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What happens if : you turns on an electric blender ( according to the change in energy)
Electric energy will change to kinetic energy and sound energy and heat energy
What happens if : you turns on an electric fan ( according to the change of energy)
Electric energy will change ti kinetic and sound energy
Write the scientefic term : the wasted energy when using the mobile phone for a long time.
Thermal energy
True or false : energy may be destroyed inside different devices
False
Give reasons : you feel heat when you come near to electric lamps
Because the electric lamps change electric energy to light and sound energy.
Give reasons : the presence of batteries inside the toy cars
Because the battery stores chemical energy that is change to electric energy when we operate the toy
Write the scientefic term : Energy produced from the electric lamp and affects our eyes.
Light energy
True or false : kinetic energy produced from the hair dryer is wasted energy
False ( sound energy is wasted energy)
The most famous robot sent to Mars is called - - - - - - - -
Curiosity Rover
True or false : the input energy in solar panels is electric energy
False ( solar)
Complete : solar panels change - - - - - ( energy to - - - - energy
Solar energy to electric energy
What is meant by : Law of conservation of energy
Energy cannot be created or destroyed, but it can change from one form to another.
Complete : energy chains start with - - - - - -
The sun
Arrange energy chain in heat a water pot :
1 sun 2 cutting trees 3 burning wood
Arrange the energy chain in the mobile phone :
1 sun 2 cutting trees 3 coal 4 electric power stations 5 battery in the mobile 6 light and sound
Arrange the energy chain in the picture :
1 solar energy 2 chemical energy 3 kinetic energy
Wtite the scientefic term : Energy produced due to friction
Thermal energy
Which of the following statements is correct? a. Energy can't be changed from one form to another. b. Energy can be changed from one form to another. c. Energy may be lost or destroyed. d. Energy can be created.
B
Write the scientefic term : it is the main source of energy on Earth
The sun
Complete : When batteries run out, we must - - - - - - - them.
Recharge or replace
Write the scientefic term : energy stored in the batteries
Chemical energy
Write the scientefic term : The output energy in the electric iron.
Thermal energy


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