User Forum

Which of the following is correct regarding the impact of deforestation?
(i) Plants of medicinal values found in the forest are lost.
(ii) Fewer trees are left around to hold the soil together, resulting in soil erosion.
(iii) Global warming occurs as there are fewer trees to absorb carbon dioxide.
(iv) The risk of an epidemic outbreak increases, resulting in the death of animals living in forests.

A (i) and (iv)
B (iii) and (iv)
C (i), (ii) and (iii)
D (i), (ii) and (iv)

Select the correct option for energy changes taking place with respect to given figure.

A Light energy → Mechanical energy → Kinetic energy
B Light energy → Chemical energy → Kinetic energy
C Chemical energy → Light energy → Kinetic energy
D Mechanical energy → Kinetic energy → Light energy

Air pollution on the road can be reduced by .................

(A) Reducing the number of vehicles on the road

(B) Widening the roads

(C) Having more traffic lights

A boy spins one wheel of an upturned bicycle and mud particles fly off. Which one of the following arrows shows the direction of movement of the mud which comes off at position X, shown in figure.

(A)

(B)

(C)