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Delta Modern Language School
Grade 4
Date ......./......./………

                  Important points on Unit (3) Concept 3.1
                               Devices and Energy

    *Sun is the main source of energy on earth.
    *Chemical energy stored in the battery is converted to kinetic energy to
    move the remote-controlled car.
    *Mars rover curiosity is used to explore Mars.
    *Mars rover gets energy from long term batteries and solar cells.

Energy transforming in some devices

Input energy           Input energy                         Output energy

    Device name  •Electrical energy                   Output energy
Hair dryer
                                               • Thermal, sound and
Washing machine                                 kinetic

                           •Electrical energy  • Kinetic and sound

Soap dispenser

                 • Potential energy            •Kinetic energy

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