Some Natural Phenomena Worksheet-2

Some Natural Phenomena Worksheet-2

1. How do cyclones decrease the fertility of the soil in the coastal areas?

(a) By flooding the land with saline water

(b) By dissolving soil and rocks

(c) By increasing the water table of the place

(d) By decreasing the water table of the place

2. Which of the following is the first sign of an approaching cyclone?

(a) Rains accompanied by lighting

(b) High temperature and humidity

(c) Cool breeze and rains

(d) Powerful water waves

3. Which of the following plays an important role in the early-warning systems for cyclones?

(a) Helicopters                              (b) Submarines

(c) Satellites                                   (d) Stars

4. Which of the following is the best thing to do during heavy lightning?

(a) Lying on the ground in an open place

(b) Going into the nearest water body

(c) Staying indoors away from metallic doors or windows

(d) Standing under a tall tree

5. When we remove polyester or woollen cloth in dark, we can see spark and hear a cracking sound. These are due to:

(a) static electricity                      (b) current electricity

(c) reflection of light                    (d) refraction of light

6. Electrical charge can be transferred from a charged object to another through:

(a) Vacuum       (b) Air                (c) Insulator      (d) Conductor

7. The streaks of bright light seen during lightning is essentially the path followed by:

(a) UV rays from sun

(b) cosmic rays

(c) accumulated electric charges

(d) none of these

8. Which of the following is safest way to protect yourself from lightning?

(a) run to an open field               (b) open an umbrella for cover

(c) take shelter under a tree       (d) squat low on ground

9. A thunderstorm is accompanied by:

(a) Lightning    (b) Cyclone        (c) Hurricane   (d) Tornado

10. High speed winds, are accompanied by:

(a) increased pressure                (b) reduced pressure

(c) water vapour                          (d) static electricity

Answer Key:

(1)-(a); (2)-(d); (3)-(c); (4)-(c); (5)-(a); (6)-(d); (7)-(c); (8)-(d); (9)-(a); (10)-(b)