Land snails and slugs produce mucus, but so does every other kind of gastropod, from marine, freshwater and terrestrial habitats. The reproductive system of gastropods also produces mucus internally from special glands.
Dry ice was discovered rather than invented. It was first discovered by Charles Thilorier a French chemist in 1834. Check link below for more information on dry ice and dry i â¦ ce makers.
Dry ice is made of solid carbon dioxide (CO 2) while ice is made, of course, of solid water. Almost all substances have a freezing point which depends on their unique physical and chemical characteristics. I'm not sure,though, how well we understand why a particular substance has the exact melting point it does.nyway, dry ice is much, much colder because carbon dioxide freezes at a lower temperature:-79 degrees Celsius or -109 degrees Fahrenheit! It's very dangerous to handle dry ice because it will freeze your skin and cause frost bite in less than a minute, causing a painful dry ice burn.