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Output

In the basic car activity, when the battery is powered on, the DC motor spins
and moves the car in a straight line. The car moves forward or stops when the
switch is turned on or off, demonstrating how electric circuits, motors, and
mechanical movement work together to create motion.

Concepts

• Electric Circuits and Motors: You will explore how electric power from

the battery makes the DC motor run, which causes the wheels of the car to
move. This teaches them the concept of how electrical energy is converted
into mechanical motion.

• Switch Control and Motion: The switch allows you to control when the car

moves or stops by completing or breaking the circuit. This introduces the
concept of simple circuits and how switches function in electronic devices.

Observations

In the basic car activity, You will observe how the car moves in a straight line
when the switch is turned on, allowing electricity to power the motor. You will

notice that the car stops when the switch is turned off, as the circuit is broken
and the motor stops working. This activity provides a hands-on understanding
of how electric motors work, how energy is transferred, and how switches can

control devices.

Construct a Giant Wheel

Gears are special parts that help create circular motion in machines. A gear
is a wheel with teeth that fit together with another gear, allowing them to turn
and move in sync. When one gear turns, it makes the other gear turn, creating

a smooth, circular movement.

Gears are used in many machines, such as bikes, clocks, and cars. They are
important because they can:

• Change the speed of motion: Large gears can make things move slower,
while smaller gears can make things move faster.

• Change the direction of motion: Gears can reverse the direction of
movement. For example, if one gear turns clockwise, the next one will turn

counterclockwise.

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