DRRR_M2Sink

Question 1

a hole in the ground that forms when water dissolves surface rock

Answer 1

sinkhole

Question 2

usual type of surface rock

Answer 2

limestone

Question 3

what is the natural cause of sinkhole

Answer 3

dissolution of sedimentary rocks

Question 4

sinkholes occurs when sedimentary rocks are _______?

Answer 4

dissolved

Question 5

when these rocks are dissolved, it can either form a _____ of water and air

Answer 5

void of water and air

Question 6

what is the human cause of sinkhole

Answer 6

underground water pumping is what causes sinkhole thru human activities

Question 7

water pumping can cause __________?

Answer 7

water flow alteration

Question 8

if water flow is altered, then the _______ of rock will happen beneath

Answer 8

erosion of rock will happen when water flow will be aletered

Question 9

a type of sinkhole that develops abruptly which is usually an hour

Answer 9

cover collapse sinkhole

Question 10

they occur when covering sediments contain a significant amount of clay

Answer 10

cover collapse sinkhole

Question 11

a type of sinkhole that develops slowly over time; covering sediments are permeable and contains sand

Answer 11

cover subsidence sinkhole

Question 12

a type of sinkhole that occurs in areas where limestone are exposed directly or covered by some sediments

Answer 12

dissolution sinkhole

Question 13

dissolution of the surface is extensive when in ______ ______with water

Answer 13

direct contact

Question 14

sinkholes that are caused by various human ctivities

Answer 14

artificial sinkhole

Question 15

what are the four types of sinkhole

Answer 15

1. cover collapse sinkhole
2. cover subsidence sinkhole
3. dissolution sinkhole
4. artificial sinkhole

Question 16

what are signs of an impending sinkhole?

Answer 16

tree or poste fall or tilt
foundations that slant
new small ponds appear after the rain
cracks in a flat ground
sudden drainage of pond
dead patches of grass or plants
well water being discolored and being contaminated by debris
cracking of home’s concrete slab
presence of odd bugs like slugs or centipede