*Echo

An Echo is a sound bounced back from a wall or some other hard object. Sound always travels at the same speed, so we can use echoes to find how far off objects are. A ships’ sonar uses echoes to find the depth of the sea. Echoes also help bats to fly in the dark.

*Castle

Castles like our forts in India are fortified homes built by rulers and lords. The first castle was built in about 950 A.D. they included a hill or mound surrounded by a ditch.

Castle often had double walls for extra protection and plenty of towers for shooting at attackers.

*Incubator

A container that kept warm is for hatching eggs.

Containers in which babies are born prematurely are kept and to keep them warm.

*Equator

An imaginary line around the middle of the Earth at an equal distance is from the North Pole and South Pole. It divides the earth into two halves called the northern Hemisphere and the southern Hemisphere.

*Tent

A shelter of canvas or other waterproof materials is that stretched over poles and attached to stakes.

*U- Turn

The driving of a vehicle is in a U-shaped course so as proceed in an opposite direction.

This is reversal policy.

*Limousine

A large, luxurious car with a driver usually used to carry important or wealthy persons.

*Cave

A cave is an underground hollow place or passage.

*Big bag

A large bag is that fills in air at once inside a car at the moment of a crash. Air bags protect the riders from being thrown forward.

*Black belt

A black colored that a person earns by reaching the highest level of skill in Judo or Karate.

*Tongue print

Tongue prints are as unique as finger prints.

*Tower

If people pump up a large amount of water is from underground. The land above may sink. This causing its famous leaning tower to learn at an even steeper angle.