Different Modes of Transport

1.Why Are School Buses Painted Yellow Color?

• A yellow object is easily noticeable from a distance.
• The yellow colour allows the school bus to be identified easily in traffic.

2.Why Are Road Rollers Used on the Roads?

• Road rollers are engineering vehicles. They are used to smoothen the roads and make roads easy to drive.
• They are heavy vehicles and help to press the tar, gravel, and sand properly on the road.

3.How Do Ships Navigate in Oceans?

• Ships sailing through the water can navigate in the ocean by identifying directions.
• Compasses are used for identifying directions in the sea as there are no identifiable objects around.

4.Some Roads Are Open for Two-Way Traffic, but Some Are Only for One-Way. Why?

• Two-way roads are used for connecting long distances. These are broader roads.
• But when the roads are narrow, with more traffic at specific points, the roads are used for one-way traffic.
• One-way roads help in decreasing the chances of accidents in crowded areas.

5.Why Do We See Fewer Wheels in a Car but More in Trucks or Lorries?

• Cars are to transport fewer people from one place to another place.
• These are built to carry lightweight materials. That is why cars are smaller and can have only four wheels.
• On the other hand, trucks and lorries are built to carry heavy loads such as heavy machines, tons of sand or rocks, etc.
• They run long distances. Therefore, the truck has more than four wheels so that the pressure of the load gets distributed and the truck or lorry can move smoothly.