Modes of Transport

1.Why Do Some Trucks and Buses Have More Than Four Wheels?

• Some trucks and buses are bigger.
• As a result, they become very heavy, creating a lot of pressure on the road when moving.
• To decrease this pressure, more wheels are added so the vehicle can move smoothly on the road.

2.What Is the Function of Car Steering?

• A car steering is a wheel-like structure that rotates and helps change the directions while the car is moving.

3.What Are the Spokes on the Wheel?

• From the centre of the wheels, some rod-like structures join the wheels' circumference or rim.
• These radiating parts are called spokes.
• The primary function of the spokes is to distribute the weight uniformly all over the wheel's rim.

4.What Is the Difference Between Local Trains and Express Trains?

The difference between local trains and express trains is as follows:

Local Trains	Express Trains
1. These trains do not cover long distances.	1. These trains cover very long distances.
2. Local trains stop at every station.	2. Express trains are galloping trains that do not stop at every station.

5.What Kinds of Goods Are Carried On Cargo Ships?

Goods like wood, fertilisers, raw materials, machinery, cement, coal, grains etc., are carried on cargo ships.

6.What Is Cabin Crew, and What Do They Do?

• Cabin crews are trained personnel who take care of people on flights.
• They serve food and drinks, and other utilities during the journey.
• They give a glimpse of different aircraft parts and brief us about their functions.
• They inform us about the measures to be taken during emergency conditions.

7.Name Different Parts of a Helicopter.

Different parts of a helicopter are:

• Cockpit
• Cabin
• Rotor blade
• Tail rotor
• Rudder

8.Name a Few Parts of a Train

Four parts of the train are-

• Coach
• Engine
• Guard's car
• Luggage van
• Berth
• Air brake