Basic Motor Parts (Internal) – Basic 5 Basic Science Lesson Note (Third Term)

Learning Objectives: By the end of the lesson, pupils should be able to:

• Mention the internal parts of motor vehicle
• Identify the internal parts of a motor vehicle
• Discuss the basic functions of the internal parts of a motor vehicle

What is a Motor Vehicle?

A motor vehicle is a self-propelled vehicle that uses an engine to move. It includes cars, buses, trucks, motorcycles, and other vehicles that transport people or goods on roads.

Internal Parts of a Motor Vehicle:

SAFETY PARTS:

1. Airbags

• Location: Dashboard, steering wheel, side panels, doors
• Appearance: Hidden bags that inflate during crashes
• Function: Protect passengers from injury during accidents by cushioning impact

2. Seat Belts

• Location: Attached to seats and car frame
• Appearance: Strong fabric straps with metal buckles
• Function: Keep passengers secure in their seats during sudden stops or crashes

3. Safety Glass

• Location: Windshield and windows
• Appearance: Special reinforced glass
• Function: Breaks into small, less dangerous pieces during accidents

CONTROL AND STEERING PARTS:

4. Steering Wheel

• Location: In front of driver’s seat
• Appearance: Circular wheel with spokes
• Function: Controls the direction the vehicle moves (left or right)

5. Dashboard

• Location: Panel in front of driver and passenger
• Appearance: Contains gauges, warning lights, and controls
• Function: Displays vehicle information (speed, fuel, temperature)

6. Gear Shift/Gear Lever

• Location: Between front seats or on steering column
• Appearance: Lever or knob with different positions
• Function: Changes gears to control vehicle speed and power

PEDALS (In cars with manual/automatic transmission):

7. Accelerator Pedal (Gas Pedal)

• Location: Rightmost pedal on floor
• Appearance: Flat pedal operated by right foot
• Function: Controls engine speed – press to go faster

8. Brake Pedal

• Location: Middle pedal (or left in automatic cars)
• Appearance: Wider pedal operated by right foot
• Function: Slows down or stops the vehicle

9. Clutch Pedal (Manual transmission only)

• Location: Leftmost pedal in manual cars
• Appearance: Pedal operated by left foot
• Function: Disconnects engine from transmission when changing gears

SEATING AND COMFORT PARTS:

10. Seats

• Location: Throughout passenger compartment
• Appearance: Cushioned chairs with adjustments
• Function: Provide comfortable seating for driver and passengers

11. Seat Adjustments

• Location: Sides and bottom of seats
• Appearance: Levers, knobs, or electric buttons
• Function: Allow seats to move forward, backward, up, down for comfort

12. Headrests

• Location: Top of seats
• Appearance: Padded supports behind head
• Function: Prevent neck injury (whiplash) during rear-end collisions

LIGHTING AND ELECTRICAL PARTS:

13. Interior Lights

• Location: Ceiling, doors, dashboard
• Appearance: Small light bulbs or LED lights
• Function: Provide lighting inside the vehicle

14. Turn Signal Indicators

• Location: Dashboard and steering column
• Appearance: Flashing lights and clicking sounds
• Function: Show which direction the car will turn

15. Hazard Light Switch

• Location: Dashboard or center console
• Appearance: Button with triangle symbol
• Function: Makes all turn signals flash to warn other drivers

CLIMATE CONTROL PARTS:

16. Air Conditioning (A/C) Vents

• Location: Dashboard, doors, ceiling
• Appearance: Adjustable slats or grilles
• Function: Direct cool or warm air throughout the vehicle

17. Heater Controls

• Location: Center dashboard
• Appearance: Knobs, buttons, or digital controls
• Function: Control temperature, fan speed, and air direction

18. Windows and Window Controls

• Location: Doors and door panels
• Appearance: Glass windows with electric or manual controls
• Function: Open and close windows for ventilation

STORAGE AND CONVENIENCE PARTS:

19. Glove Compartment

• Location: Dashboard on passenger side
• Appearance: Hinged compartment with handle
• Function: Store small items like documents, tools, emergency supplies

20. Cup Holders

• Location: Center console, doors, seat backs
• Appearance: Circular indentations or retractable holders
• Function: Hold drinks securely while driving

21. Storage Compartments

• Location: Doors, center console, seat backs
• Appearance: Various sized compartments and pockets
• Function: Store personal items, tools, and supplies

MIRRORS AND VISIBILITY:

22. Rearview Mirror

• Location: Attached to windshield or ceiling
• Appearance: Flat or slightly curved mirror
• Function: Allows driver to see traffic behind the vehicle

23. Side Mirrors

• Location: On exterior of doors (visible from inside)
• Appearance: Adjustable mirrors with controls inside
• Function: Help driver see vehicles in adjacent lanes

Functions of Internal Motor Vehicle Parts:

SAFETY FUNCTIONS:

• Protect occupants during accidents and collisions
• Prevent injuries through restraint systems and impact absorption
• Provide visibility for safe driving in all conditions
• Alert others to vehicle intentions and problems

CONTROL FUNCTIONS:

• Direct vehicle movement through steering and navigation
• Control speed through acceleration and braking systems
• Manage power delivery through transmission and gear systems
• Monitor vehicle status through gauges and warning systems

COMFORT FUNCTIONS:

• Provide comfortable seating for all occupants
• Control interior climate through heating and cooling systems
• Offer convenient storage for personal items and necessities
• Enable easy operation through ergonomic design

COMMUNICATION FUNCTIONS:

• Signal intentions to other drivers through indicators
• Warn of hazards through emergency lighting systems
• Provide information to driver through dashboard displays
• Enable emergency communication through horn and lights

Vehicle Safety Rules:

For Passengers:

• Always wear seat belts – Even for short trips
• Sit properly – Back against seat, feet on floor
• Keep hands and head inside – Don’t stick body parts out windows
• Follow driver instructions – Listen to safety directions

For Drivers (Future Learning):

• Adjust mirrors and seat – Before starting the vehicle
• Check dashboard warnings – Ensure all systems are working
• Use signals properly – Indicate turns and lane changes
• Maintain safe speed – Follow speed limits and road conditions

Assessment questions

LESSON 1: BASIC MOTOR PARTS (INTERNAL) (Multiple Choice Questions)

1. Which part of a car protects passengers during a crash by inflating quickly? a) Seat belt b) Airbag c) Steering wheel d) Dashboard
2. The pedal used to slow down or stop a vehicle is called: a) Accelerator pedal b) Clutch pedal c) Brake pedal d) Gear pedal
3. Which part controls the direction a vehicle moves? a) Gear shift b) Steering wheel c) Dashboard d) Seats
4. Seat belts function to: a) Make the car go faster b) Keep passengers secure in their seats c) Control the car’s direction d) Start the car’s engine
5. The dashboard displays: a) The car’s external appearance b) Vehicle information like speed and fuel level c) The car’s color options d) Passenger entertainment