The most difficult ice riddles A list of ice related questions that are most often answered incorrectly Technology quiz What sound can be heard when approaching an iceberg?A fizz. When a piece of iceberg ice melts, it makes a fizzing sound called "Bergie Seltzer". This sound is made when the water-ice interface reaches compressed air bubbles trapped in the ice. As this happens, each bubble bursts, making a 'popping' sound. The bubbles contain air trapped in snow layers very early in the history of the ice, that eventually got buried to a given depth (up to several kilometers) and pressurized as it transformed into firn then to glacial ice.very hard 33% a cracking noisea cracking noise48%a fizza fizz33%a roara roar7%a whispera whisper10%Created by: globalquiz.org. Statistics based on 8069 answers in 4 languages »Antarctic riddles » On which of the following lakes are icebreakers most extensively used?Lake Superior. The Great Lakes are important shipping route, mainly for bulk goods like iron ore or coal. Several icebreakers are busy each winter to keep the route open.very hard 34% Lake BailkalLake Bailkal23%Lake SuperiorLake Superior34%Great Bear LakeGreat Bear Lake23%Lake OnegaLake Onega17%Created by: globalquiz.org. Statistics based on 8997 answers in 2 languages »lakes riddles » This is Amundsen–Scott South Pole Station. Why is it elevated?To avoid being buried in snow. All structures at the South Pole cause wind-blown snow to build up in the surrounding area (about four feet of snow per year). The station building has sloping lower portion of wall, which causes the snow to be scoured away.very hard 38% for earthquake safetyfor earthquake safety7%to reduce heat lossto reduce heat loss35%to avoid heating the groundto avoid heating the ground19%to avoid being buried in snowto avoid being buried in snow38%Created by: Debbie Fox. Statistics based on 4092 answers in 2 languages »technology riddles » Which water phase is the most dense?Liquid water. Ice frozen at atmospheric pressure is approximately 8.3% less dense than liquid water. Thus, ice floats on liquid water.hard 48% liquid waterliquid water48%water icewater ice35%water vaporwater vapor4%all have the same densityall have the same density11%Created by: Kasia. Statistics based on 22857 answers in 2 languages »water riddles » What is dry ice?Solidified CO2. Dry ice is used in refrigeration. It has an interesting property: it maintains a constant temperature of -78.5C in a warmer environment. This is because dry ice does not melt and sublimes directly into the gaseous form.very easy 93% glacierglacier3%solidified CO2solidified CO293%legendary alchemical substancelegendary alchemical substance2%meringue dessertmeringue dessert1%Created by: Niezgodna. Statistics based on 14514 answers in 2 languages »physics riddles » Play technology quiz and see all the questions.