10

(12

13

14

(15

16

(18)

19

Question 6 D

Hydraulic fracturing, or fracking, is the pumping of highly pressurized water with a mixture of sand and chericals into boreholes to

A create cracks within the rock in order to provide pathways for the release of gas and oil

B) pulverize the rock in order to let gas and oil rise through the soil horizons

creopen old mine shafts, from which gas and oil can be collected

D

create seismic movement and artificial earthquakes in order to liberate gas and oil

E

supersaturate the rock with the fracking fluid, which scrubs gas and oil from the rock by abrasion