Some Natural Phenomena Worksheet-6

Some Natural Phenomena Worksheet-6

1. Which of the following scales are not linear in nature? (i) Decibel (ii) Richter (iii) Meter

(a) Decibel                                     (b) Richter &  Meter

(c) Richter                                      (d) Decibel & Richter

2. An earthquake is caused by

(a) Shaking of the earth's surface

(b) Tides in ocean

(c) The movement of earth's plate

(d) All of these

3. Which of these things would you do if you live in the earthquake prone area?

(i) You would keep an emergency kit always ready

(ii) You would have only open book shelves and open cupboards in your house

(iii) You would fix the cupboards to the walls

(iv) You would not keep breakable items on the upper shelves

(a) Only You would fix the cupboards to the walls is correct

(b) Both You would keep an emergency kit always ready and You would have only open book shelves and open cupboards in your house are correct

(c) All are correct

(d) You would keep an emergency kit always ready, You would fix the cupboards to the walls and You would not keep breakable items on the upper shelves are correct.

4. The Instrument used to record the earthquake is called the.

(a) Epinograph                             (b) Animometer

(c) Seismograph                           (d) None of these

5. Choose the correct statement.

(a) Unlike charges repel each other

(b) Moving charges constitute electric current

(c) A woollen cloth can not be charged

(d) None of these

6. The place where tectonic plates meet are called the.

(a) Fault lines                                (b) Epicentre

(c) Slick lines                                 (d) None of these

7. ______ are huge waves created when an earthquake happens under the sea.

(a) Tsunamis    (b) Storm           (c) Fault line     (d) Shift wave

8. The _____ is the point on the surface of the earth directly above the focus of the earthquake.

(a) Stress           (b) Fault lines   (c) Epicentre     (d) None of these

9. When two bodies are rubbed against each other, _________.

(a) They acquire equal and similar charges

(b) They acquire equal and opposite charges

(c) They acquire different charges but in different amounts depending upon their masses

(d) They do not acquire any charge.

10. Electroscope is used

(a) To detect and test small electric charges:

(b) To calculate the amount of electric charge flowing through the conductor in the given interval of time

(c) To find out the presence of antimatter

(d) To test the presence of magnetic field

11. How do cyclones decrease the fertility of 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

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

(a) Rains accompanied by lightning

(b) High temperature and humidity

(c) Cool breeze and rains

(d) Powerful water waves

13. When we remove polyester or woolen 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

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

(a) Helicopters                              (b) Submarines

(c) Satellites                                   (d) Stars

15. Electric charge is measured in

(a) Coulombs    (b) Amperes      (c) Volts             (d) Watts

Answer Key:

(1)-(d); (2)-(c); (3)-(d); (4)-(c); (5)-(b); (6)-(a); (7)-(a); (8)-(c); (9)-(b); (10)-(a); (11)-(a); (12)-(d); (13)-(a); (14)-(c); (15)-(a)