From my limited amateur igloo making experience, it depends on the air temperature and wind.
The best hardening, meaning it made fast sturdy snow blocks, happened at around -9°C (16°F). I would pack fluffy or crystalline snow in my wooden snow mold, and it would be a hard block in around 45 minutes. I can't explain how this happens, but no heat or melting was involved, since it was WAY below freezing, and often in the dark, so no heat from the sun either.
Colder than -9C would make more brittle blocks that would break easily, and temps around -3°C (26°F) would not harden the block well, unless it sat for many hours.
After the block comes out of the mold, allowing it to sit in the wind hardens it into a much sturdier block, but the timing I'm not sure of.
The time it takes for lava to harden can vary depending on factors such as temperature, composition, and volume. Generally, lava can start to harden within minutes to hours after being exposed to air, forming a solid crust. However, the interior may take days, weeks, or even years to fully cool and harden.
The time it takes to melt a gallon of snow at room temperature can vary depending on factors such as the temperature of the room and the type of container used. Generally, it may take around 1-2 hours for a gallon of snow to melt at room temperature.
A glacier forms in a place where snow builds up for years. The main thing is that it has to be in a place where the snow does not melt in the summer. After so long, the weight of the snow compresses and becomes as, and as long as more snow falls on top of that glacier, that is what happens..... ^.^ I hope this answer helped!
Lava does not "dry" like water does. It cools and solidifies, forming rocks like basalt or obsidian. The time it takes for lava to cool and harden depends on its volume, thickness, and composition, but it can range from hours to weeks.
No, it does not have to be freezing for it to snow. Snow can form when the air temperature is above freezing, as long as the higher atmosphere is cold enough for the snowflakes to remain frozen until they reach the ground.
It takes at least 3 days to harden.
At least a month to dry and another week to harden
Wood putty typically takes around 24 hours to fully harden once applied.
Salt dough typically takes 24-48 hours to fully harden, depending on the thickness of the dough and the humidity in the environment.
2 years
I hope it doesn't take too long, considering my dad poured hot wax into one of our toilets. He said that he wanted to see wax harden instantly.
Shellac typically dries within 30 minutes to an hour, but it can take up to 24 hours to fully cure and harden.
The time it takes for glue to harden can vary depending on the type of glue used. Some glues can dry in as little as a few minutes, while others may take several hours or even longer to fully harden. It is best to refer to the instructions provided by the manufacturer of the specific glue you are using for more precise information.
3-4 years
No, it woud take too long to harden and would very likely shrink.
30 minutes to the touch and 24 hours to be functional. If the Mortar is being used in a fireplace or chimney a week or more may be required.
After a fracture, about 6 weeks although bone remodeling is constantly going on.