Which one of the following places is unlikely to be affected by a cyclone?

1

(a)

Chennai

(b)

Mangaluru (Mangalore)

(c)

Amritsar

(d)

Puri

Orissa was hit by a cyclone with wind speed of 200 km/h on which date

1

(a)

18Oct, 1998

(b)

18 Oct, 1999

(c)

18 Oct, 2001

(d)

18 Oct, 2000

Wind is caused due to

1

(a)

uneven heating of equator and poles

(b)

difference in humidity

(c)

even heating of land and water

(d)

None of the above

Increased wind speed is accompanied with

1

(a)

increased air pressure

(b)

affected air pressure

(c)

reduced air pressure

(d)

lower humidity

The calm centre of cyclone is called

1

(a)

head

(b)

eye

(c)

water spout

(d)

storm

The bicycle tube __________ when it is overfilled with _________.

1

(a)

bursts, air

A change in the direction of wind is caused dueto __________ of earth.

1

(a)

rotation

Uneven heating of land generates monsoon winds from _________ direction in ___________

1

(a)

South-West, summer

A violent Tornado can travel at the speeds of about ___________

1

(a)

300 km/h

Air around us exerts _________________

1

(a)

pressure

Uneven heating of land and water in winter (North-West and colder land) brings little rain in winter.

1

(a) False

(b) True

If wind flows from land to the ocean, then it is day time.

1

(a) True

(b) False

A very high pressure system with very high speed wind surroundings, it forms a cyclone.

1

(a) True

(b) False

The coast line of India is not vulnerable to cyclones.

1

(a) True

(b) False

Warm air is lighter than cool air.

1

(a) False

(b) True

Can you imagine what would happen if high speed winds blew over the roofs of buildings?

1

(a)

When the roofs are weak, they can be lifted and blown away.

What makes the balloon inflated when the boiling tube is placed in hot water?

1

(a)

The expansion of air caused by heat.

Why is the same balloon deflated when the tube is kept in cold water?

1

(a)

The air contracts owing to low temperature.

Can we infer from the first observation that air expands on heating?

1

(a)

Yes.

Can you now state what happens to the air in the boiling tube when it cools down?

1

(a)

Air contracts on cooling.

Enlist the other names of cyclone.

2

(a)

Suggest some precautions to be taken to prevent the roof of a tin sheet from flying away during a fierce wind storm.

2

(a)

Name the instrument which is used to measure the speed of wind.

2

(a)

Name the factor responsible for the increase of speed of wind or cyclones.

2

(a)

Can you say why smoke always rises up?

2

(a)

What planning is required in advance to deal with the situation created by a cyclone?

3

(a)

Mention an example when the cyclone hit a part of India and how much destruction was caused due to it.

3

(a)

Give three precautions that should be taken to protect oneself from the thunderstorm.

3

(a)

Name some effective safety measures against cyclone?

3

(a)

Due to uneven heating of land and ocean water what happens in the following season? In winter season

3

(a)

The picture in figure shows tree line along the sea coast on an island near the equator. As shown, the tree tops are permanently bent in one direction. Are the trees bend towards the sea or away from it? Explain.

5

(a)