Class 7 Geography Chapter 3 Question Answers - Our Changing Earth

Very Short Q & A :

Q1: The lithosphere is broken into number of plates known as…………………….

Ans : Lithospheric plate

Q2: The molten magma inside the earth moves in a circular manner.( T/F)

Ans : True

Q3: Define focus.

Ans : The place in the crust where the movement starts is called the focus.

Q4: Which of the following is not a part of earth quake waves-

1. S

2. P

3. L

4. T

Ans :  T

Q5: Which of the following machine is used to measure earthquake-

a. Richter scale

b. Seismograph

c. Sphygmomanometer

d. Anemometer

Ans :  Seismograph

Q6: ………………is used to measure magnitude of earth quake.

Ans : Richter scale

Q7: The highest water fall is…………………falls of Venezuela.

Ans : Angel

Q8: What is vent?

Ans : The narrow opening of a volcanoes is called vent.

Q9: Sudden movement in the earth interior are cause due to –

a. Exogenic force

b. Plutonic force

c. Endogenic force

d. None of these

Ans : Endogenic

Q10: The strength of the earth quake decreases away from the centre. (T/F)

Ans : True

Q11: Match the following –

Ans :
  1-b, 2-c, 3-a

Q12: A ………………is a vent in the earth crust through which molten material erupts suddenly.

Ans : Volcano

Q13: When the rivers began to break up into a number of streams called………………….

Ans : Distributaries

Q14: Which among the following is not the agent of weathering and erosion-

a. Wind

b. Water

c. Ice

d. Heat

Ans :  Heat

Q15: The depositional feature of a glacier is-

a. Moraine

b. Beach

c. Flood plain

Ans : Moraine

Q16: Focus lies just above the epicentre (T/F)

Ans : False

Q17: Severe earth quake calculated above the 5.0 magnitude. (T/F)

Ans : False