http://www.google.com.au/imgres?imgurl=http://i.ytimg.com/vi/MX3S1uM59e4/maxresdefault.jpg&imgrefurl=http://www.youtube.com/watch?v=MX3S1uM59e4&h=1080&w=1920&tbnid=am0R7PqJUvDS-M:&zoom=1&docid=Q4q2MMzLb7dXxM&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CCYQMygJMAk

http://www.google.com.au/imgres?imgurl=http://www.sjrwmd.com/watersupply/images/sinkhole.jpg&imgrefurl=http://www.sjrwmd.com/watersupply/howsinkholesform.html&h=188&w=288&tbnid=hY-riC1USaZL9M:&zoom=1&docid=uBc55M3ushz_AM&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CCkQMygMMAw

http://www.google.com.au/imgres?imgurl=http://www.csmonitor.com/var/archive/storage/images/media/images/0601-guatemala-sink-hole/7993182-1-eng-US/0601-Guatemala-sink-hole.jpg&imgrefurl=http://imgarcade.com/1/largest-sinkhole-ever-recorded/&h=400&w=600&tbnid=8v768pg6tSskHM:&zoom=1&docid=FWEm-EajOGFMWM&itg=1&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CGkQMyhCMEI

http://www.google.com.au/imgres?imgurl=http://www.greendiary.com/wp-content/uploads/2012/07/sinkhole_2196.jpg&imgrefurl=http://www.greendiary.com/giant-sinkhole-in-guatemala.html&h=448&w=297&tbnid=ldFD-un8IG0euM:&zoom=1&docid=AWf0jHJQg3cFzM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CGQQMyg9MD0

http://www.google.com.au/imgres?imgurl=http://i.ytimg.com/vi/tQvv8YFCGsY/maxresdefault.jpg&imgrefurl=http://www.youtube.com/watch?v=tQvv8YFCGsY&h=720&w=1280&tbnid=dqM55OK90cJ9OM:&zoom=1&docid=oK0eqFFeIIzO1M&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CCMQMygGMAY

http://www.google.com.au/imgres?imgurl=http://i.ytimg.com/vi/P6b_AdpEppo/maxresdefault.jpg&imgrefurl=http://www.youtube.com/watch?v=P6b_AdpEppo&h=720&w=1280&tbnid=sje2fkD05oOjPM:&zoom=1&docid=6hMkXh_z_ZItLM&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CCQQMygHMAc

How do SINK HOLES occur?

http://www.google.com.au/imgres?imgurl=http://www.bgs.ac.uk/research/engineeringGeology/shallowGeohazardsAndRisks/images/sinkHoles/SinkholTtypes.gif&imgrefurl=http://www.bgs.ac.uk/research/engineeringGeology/shallowGeohazardsAndRisks/sinkholes/home.html&h=362&w=650&tbnid=TzCx0spTM2AG0M:&zoom=1&docid=zmjQiOIOmHRlmM&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CCUQMygIMAg

http://www.google.com.au/imgres?imgurl=http://dnr.mo.gov/geology/images/sinkholemitigation.jpg&imgrefurl=http://www.dnr.mo.gov/geology/geosrv/envgeo/sinkholes.htm&h=591&w=500&tbnid=kP0YgB86gWMXJM:&zoom=1&docid=B-NLWlhloze26M&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CCcQMygKMAo

http://www.google.com.au/imgres?imgurl=http://uretekicr.com/wp-content/uploads/2013/01/sinkhole_causes.jpg&imgrefurl=http://uretekicr.com/2013/02/06/deep-injection-for-sinkholes/&h=512&w=640&tbnid=EWtTnCMq0qSyeM:&zoom=1&docid=LamcpJh60mP6FM&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CCwQMygPMA8

http://www.google.com.au/imgres?imgurl=http://gsa.state.al.us/gsa/geologichazards/Sinkholes_files/image019.jpg&imgrefurl=http://planet.infowars.com/outdoors/sinkholes-louisiana-sinkhole&h=371&w=578&tbnid=JU5dTQXrQfw9FM:&zoom=1&docid=uyzIPWTKWdFPCM&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CDAQMygTMBM

http://www.google.com.au/imgres?imgurl=http://xfilexplore.com/wp-content/uploads/2011/02/SINKHOLE-one-of-biggest-hole-in-world.jpg&imgrefurl=http://xfilexplore.com/2011/list-of-10-biggest-hole-in-the-world/&h=328&w=500&tbnid=dnb0JFANGR_KQM:&zoom=1&docid=zwh1dDF9GH2SfM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CCcQMygKMAo

http://www.google.com.au/imgres?imgurl=http://thechive.files.wordpress.com/2009/02/amazing-holes-world-0.jpg&imgrefurl=http://thechive.com/2009/02/14/mind-blowing-holes-in-the-earth-8-photos/&h=375&w=500&tbnid=IrtsWIcdgm5KkM:&zoom=1&docid=cETyLS6KL06CrM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CCoQMygNMA0

http://www.google.com.au/imgres?imgurl=http://investorshangout.com/images/MYImages/1241411493_o%20sinkhole.jpeg&imgrefurl=http://investorshangout.com/post/view?id=1084298&h=454&w=667&tbnid=tz_Jvh8ypG_E3M:&zoom=1&docid=BDqx4w_SXo_lhM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CDwQMygVMBU

http://www.google.com.au/imgres?imgurl=http://www.wnd.com/files/2012/11/121124saltdome.jpg&imgrefurl=http://www.wnd.com/2012/11/monster-sinkhole-sparks-catastrophe-worries/&h=243&w=299&tbnid=faoiPSy_StM4-M:&zoom=1&docid=OL2SSaYRT-9CCM&ei=-aQbVJ7LCsPM8gWHvYKwBg&tbm=isch&ved=0CDsQMygUMBQ

http://www.google.com.au/imgres?imgurl=http://www.sjrwmd.com/watersupply/images/sinkhole.jpg&imgrefurl=http://www.sjrwmd.com/watersupply/howsinkholesform.html&h=188&w=288&tbnid=hY-riC1USaZL9M:&zoom=1&docid=uBc55M3ushz_AM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CCcQMygMMAw

http://www.google.com.au/imgres?imgurl=http://dnr.mo.gov/geology/images/sinkholedevelopmentsteps.jpg&imgrefurl=http://www.dnr.mo.gov/geology/geosrv/envgeo/sinkholes.htm&h=367&w=650&tbnid=UPbGbrvlB2orFM:&zoom=1&docid=B-NLWlhloze26M&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CCAQMygFMAU

http://www.google.com.au/imgres?imgurl=http://www.humorlaugh.com/pictures/6_most_terrifying_sinkhole_pictures/2085-1398059977_e0d9608b46_z.jpg&imgrefurl=http://funny-pictures.picphotos.net/the-most-terrifying-mountain-bike-trail-on-earth-misc-photography/img.xcitefun.net*users*2009*06*81585,xcitefun-the-most-terrifying-mountain-bike-trail-on-earth-4.jpg/&h=427&w=640&tbnid=BFgLay4dedFZ_M:&zoom=1&docid=7Dqk69r2a1f4cM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CG0QMyhGMEY

http://www.google.com.au/imgres?imgurl=http://www.getfrank.co.nz/uploads/images/Halfwidth/NewFolder-4/_resampled/ResizedImage250375-chuck5.jpg&imgrefurl=http://www.getfrank.co.nz/editorial/features/get-frank-audience-interview-with-chuck-berry&h=375&w=250&tbnid=AZ1y-S-WtWXolM:&zoom=1&docid=8lPOvXJlBIVLDM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CHUQMyhOME4

http://www.google.com.au/imgres?imgurl=http://2.bp.blogspot.com/-jBY-cdBjiAA/ThBCMGonxJI/AAAAAAAAAdA/jc5gqGg_7cE/s1600/Xiaozhai+tiankeng+-+Chongqing+Municipality,+China.jpg&imgrefurl=http://geology.knoji.com/ten-marvelous-sinkholes-in-the-world/&h=352&w=470&tbnid=3kTBqDJ750LL1M:&zoom=1&docid=kewfsoWuEdkbKM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CG8QMyhIMEg

http://www.google.com.au/imgres?imgurl=http://i.ytimg.com/vi/nGkDouBVoLs/0.jpg&imgrefurl=http://article.wn.com/view/2014/05/13/Fire_truck_trapped_in_Bilgola_sinkhole/&h=360&w=480&tbnid=Bew8-bwSfOL45M:&zoom=1&docid=6iYm0Eu_LaKr6M&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CHIQMyhLMEs

http://www.google.com.au/imgres?imgurl=http://www.mexconnect.com/assets/0000/2766/zacaton1_medium.jpg?1231859985&imgrefurl=http://www.mexconnect.com/articles/3026-did-you-know-mexico-has-the-deepest-water-filled-sinkhole-in-the-world-in-tamaulipas&h=369&w=400&tbnid=01neLOEEb_eChM:&zoom=1&docid=-G2dakMPreqK4M&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CEAQMygZMBk

http://www.google.com.au/imgres?imgurl=http://static.ddmcdn.com/gif/sinkholes-picture-6.jpg&imgrefurl=http://news.discovery.com/earth/rocks-fossils/everything-you-need-to-know-about-sinkholes-130301.htm&h=470&w=660&tbnid=tjEVrPTMfcgrmM:&zoom=1&docid=o1mxoEt--OqgbM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CEUQMygeMB4

http://www.google.com.au/imgres?imgurl=http://cdn.offtrackplanet.com/legacy/012/cenotes/10569011374_7f2174c8c6_z.jpg&imgrefurl=http://offtrackplanet.com/magazine/articles/5-mind-blowing-natural-sinkholes-around-the-world&h=422&w=640&tbnid=DnH7MDpK_FsyUM:&zoom=1&docid=qnYptH6_ivh2hM&ei=V6EbVNnoOoS58gXPp4C4DA&tbm=isch&ved=0CE8QMyhHMEc4yAE

http://www.google.com.au/imgres?imgurl=http://xfilexplore.com/wp-content/uploads/2011/02/MONTICELLO-DAM-one-of-10-biggest-hole-in-world.jpg&imgrefurl=http://xfilexplore.com/2011/list-of-10-biggest-hole-in-the-world/&h=335&w=505&tbnid=vZmtaqgHtn0PiM:&zoom=1&docid=zwh1dDF9GH2SfM&ei=V6EbVNnoOoS58gXPp4C4DA&tbm=isch&ved=0CGQQMyhcMFw4yAE

http://www.google.com.au/imgres?imgurl=http://img31.mtime.cn/CMS/News/2013/12/09/093516.46485228.jpg&imgrefurl=http://godzilla2014.blogspot.com/2013_12_01_archive.html&h=353&w=500&tbnid=W5VWsu3zGRz4yM:&zoom=1&docid=jW4TpZhqR2BAwM&ei=jaEbVIzjO8a48gXR6oA4&tbm=isch&ved=0CAwQMygEMAQ4rAI

http://www.google.com.au/imgres?imgurl=http://uretekicr.com/wp-content/uploads/2013/01/sinkhole_causes.jpg&imgrefurl=http://uretekicr.com/2013/02/06/deep-injection-for-sinkholes/&h=512&w=640&tbnid=EWtTnCMq0qSyeM:&zoom=1&docid=LamcpJh60mP6FM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CCoQMygPMA8

http://www.google.com.au/imgres?imgurl=http://gsa.state.al.us/gsa/geologichazards/Sinkholes_files/image019.jpg&imgrefurl=http://planet.infowars.com/outdoors/sinkholes-louisiana-sinkhole&h=371&w=578&tbnid=JU5dTQXrQfw9FM:&zoom=1&docid=uyzIPWTKWdFPCM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CC4QMygTMBM

http://www.google.com.au/imgres?imgurl=http://dnr.mo.gov/geology/images/sinkholemitigation.jpg&imgrefurl=http://www.dnr.mo.gov/geology/geosrv/envgeo/sinkholes.htm&h=591&w=500&tbnid=kP0YgB86gWMXJM:&zoom=1&docid=B-NLWlhloze26M&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CCUQMygKMAo

http://www.google.com.au/imgres?imgurl=http://www.wnd.com/files/2012/11/121124saltdome.jpg&imgrefurl=http://www.wnd.com/2012/11/monster-sinkhole-sparks-catastrophe-worries/&h=243&w=299&tbnid=faoiPSy_StM4-M:&zoom=1&docid=OL2SSaYRT-9CCM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CDcQMygUMBQ

http://www.google.com.au/imgres?imgurl=http://i.ytimg.com/vi/uiI_jQ-YlbI/0.jpg&imgrefurl=http://article.wn.com/view/2014/07/30/Mysterious_Sinkholes_Are_Forming_By_One_of_the_Worlds_Talles/&h=360&w=480&tbnid=XV0_CsDpvzochM:&zoom=1&docid=t5oBHSPfN7ej7M&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CDgQMygVMBU

http://www.google.com.au/imgres?imgurl=https://itsadisaster.files.wordpress.com/2013/03/sinkhole-parking_lot.jpg&imgrefurl=http://imgarcade.com/1/largest-sinkhole-ever-recorded/&h=464&w=587&tbnid=Z7360uDQZD8YgM:&zoom=1&docid=FWEm-EajOGFMWM&itg=1&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CHQQMyhNME0

http://www.google.com.au/imgres?imgurl=http://wgnhs.uwex.edu/wp-content/uploads/2012/08/sinkhole_formation.jpg&imgrefurl=http://wgnhs.uwex.edu/water-environment/karst-sinkholes/&h=297&w=595&tbnid=Ec5QW2Yy_C_aiM:&zoom=1&docid=gLdR-RXDGPPdfM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CDkQMygWMBY

http://www.google.com.au/imgres?imgurl=http://upload.wikimedia.org/wikipedia/commons/5/5e/Sinkhole.jpg&imgrefurl=http://en.wikipedia.org/wiki/Sinkhole&h=1179&w=1965&tbnid=FfrtBjTmxXMIaM:&zoom=1&docid=VSIIt7jMecCdmM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CDwQMygZMBk

http://www.google.com.au/imgres?imgurl=http://news.images.itv.com/image/file/343884/image_update_img.jpg&imgrefurl=http://www.itv.com/news/tyne-tees/story/2014-02-17/huge-sinkhole-opens-up-in-ripon/&h=351&w=624&tbnid=S39VFA9Z6db55M:&zoom=1&docid=eYvza58zgEWUlM&ei=jaEbVIzjO8a48gXR6oA4&tbm=isch&ved=0CFcQMyhPME84rAI

http://www.google.com.au/imgres?imgurl=http://i1.ytimg.com/vi/go8V4qDJHMg/0.jpg&imgrefurl=http://article.wn.com/view/2014/08/19/More_Sinkholes_Discovered_in_Songpa/&h=360&w=480&tbnid=3nsT6jo9lpxgMM:&zoom=1&docid=YFmmt0IDhY0AYM&itg=1&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CFsQMyg4MDg

http://www.google.com.au/imgres?imgurl=http://i.dailymail.co.uk/i/pix/2013/03/04/article-2287995-18704C0B000005DC-232_638x357.jpg&imgrefurl=http://www.dailymail.co.uk/news/article-2287995/First-look-deadly-sinkhole-swallowed-man-slept-brother-claims-authorities-save-him.html&h=357&w=638&tbnid=WW9G6SDwLQQTcM:&zoom=1&docid=3yIo00VIpewWVM&ei=V6EbVNnoOoS58gXPp4C4DA&tbm=isch&ved=0CC8QMygnMCc4yAE

http://www.google.com.au/imgres?imgurl=http://i.ytimg.com/vi/WhW2jwiPSk8/0.jpg&imgrefurl=http://article.wn.com/view/2013/03/05/Second_sinkhole_appears_in_Tampa_area_New_Florida_sinkhole_m/&h=360&w=480&tbnid=RQhJ23obdugBIM:&zoom=1&docid=mcxKqEFJS-XYyM&itg=1&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CFwQMyg5MDk

http://www.google.com.au/imgres?imgurl=http://wgnhs.uwex.edu/wp-content/uploads/2012/08/sinkhole_formation.jpg&imgrefurl=http://wgnhs.uwex.edu/water-environment/karst-sinkholes/&h=297&w=595&tbnid=Ec5QW2Yy_C_aiM:&zoom=1&docid=gLdR-RXDGPPdfM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CDkQMygWMBY

http://www.google.com.au/imgres?imgurl=http://earthshiftx.com/wp-content/uploads/2014/03/sinkhole-trailer.png&imgrefurl=http://earthshiftx.com/tag/sinkhole/&h=254&w=595&tbnid=wxApmoEEZh4MkM:&zoom=1&docid=LiXSF-PCoFi-qM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CF4QMyg7MDs

http://www.google.com.au/imgres?imgurl=http://static1.businessinsider.com/image/5081b7feecad04931d000010/the-worlds-biggest-sinkholes.jpg&imgrefurl=http://galleryhip.com/largest-sinkhole.html&h=3739&w=4985&tbnid=tANCrZ09Q7wpLM:&zoom=1&docid=dLMmoJGUwzUBsM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CE8QMygoMCg

http://www.google.com.au/imgres?imgurl=http://wgnhs.uwex.edu/wp-content/uploads/2012/08/sinkhole_formation.jpg&imgrefurl=http://wgnhs.uwex.edu/water-environment/karst-sinkholes/&h=297&w=595&tbnid=Ec5QW2Yy_C_aiM:&zoom=1&docid=gLdR-RXDGPPdfM&ei=96AbVJykAdHp8AWelILIDg&tbm=isch&ved=0CFAQMygpMCk&iact=rc&uact=3&dur=1875&page=6&start=41&ndsp=9

http://www.google.com.au/imgres?imgurl=http://www.yaxkinspa.com/uploads/2/4/7/1/24712588/600568507_orig.jpg?259&imgrefurl=http://www.yaxkinspa.com/blog.html&h=167&w=283&tbnid=3g9nksUSxj-7sM:&zoom=1&docid=ZSkQ9ytMEuZNdM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CGQQMyhBMEE

http://www.google.com.au/imgres?imgurl=http://files.abovetopsecret.com/images/member/cf6b769d369d.jpg&imgrefurl=http://www.abovetopsecret.com/forum/thread684275/pg1&h=178&w=449&tbnid=oQ9MBds5NHgDSM:&zoom=1&docid=VAwGdtBYpx0kPM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CDoQMygXMBc

http://www.google.com.au/imgres?imgurl=http://news.cals.wisc.edu/files/2014/04/HM-Five-Things-1-sinkhole.jpg&imgrefurl=http://news.cals.wisc.edu/2014/04/14/five-things-everyone-should-know-about-sinkholes/&h=750&w=1000&tbnid=TZsjlJvKHSXp4M:&zoom=1&docid=FuXEsSy57ZgSdM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CHYQMyhTMFM

http://www.google.com.au/imgres?imgurl=http://strangesounds.org/wp-content/uploads/2013/02/g000258000000000000d6d63a9fd25f19426f9764d43428ca38e15c719a.jpg&imgrefurl=http://strangesounds.org/2013/02/sinkhole-formation-in-the-usa-heavy-rain-opens-up-sinkholes-in-different-us-states-february-13-2013.html&h=600&w=414&tbnid=kudY2qQzFyl4JM:&zoom=1&docid=_-8ExxDWUHi6hM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CHUQMyhSMFI

http://www.google.com.au/imgres?imgurl=http://cdn2-b.examiner.com/sites/default/files/styles/image_content_width/hash/18/c8/18c8e6e8769e0ddc9283594843d6a1a9.jpg?itok=Vp4PYh16&imgrefurl=http://www.examiner.com/article/siberian-sinkhole-aliens-created-hole-at-the-end-of-the-world-are-ufos-oval&h=347&w=600&tbnid=QvI0kQi3-DSH4M:&zoom=1&docid=PyFsDh4ocTY9MM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CHcQMyhUMFQ

http://www.google.com.au/imgres?imgurl=http://i1328.photobucket.com/albums/w527/Speek2/Sinkhole-forming0001_zps5a99a84e.jpg&imgrefurl=http://www.geocaching.com/seek/cache_details.aspx?guid=a169268e-df19-49c3-b960-b4d51b1c3e34&h=695&w=1024&tbnid=S41aynEq_4Ke7M:&zoom=1&docid=mde_pG_ux-mPdM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CD0QMygaMBo

http://www.google.com.au/imgres?imgurl=http://cdn.isciencetimes.com/data/images/full/2012/11/30/2923.png&imgrefurl=http://www.isciencetimes.com/articles/4733/20130320/sinkhole-swallows-pond-california-chasm-appears-overnight.htm&h=806&w=950&tbnid=fHfUt9c4UVovoM:&zoom=1&docid=sqYx4ki-IkHouM&ei=qKIbVJPUOs7e8AWJ54DoBA&tbm=isch&ved=0CGcQMyhEMEQ

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