Obsidian forms slowly over millions of years as molten rock cools and solidifies deep within the Earth's crust. Its formation is a result of the slow cooling of lava that leads to the development of a glass-like texture.
It can be reversed but not quickly. Ozone thinning will be reversed gradually and slowly.
very coarse
Granite is formed from the slow cooling of magma.
Granite is the result of slow cooling processes of felsic magmas.
It depends on the temperature of its surroundings. Ice will melt more quickly in a warmer environment and more slowly in a cooler environment. Other factors, such as the size and shape of the ice, can also influence how quickly it melts.
slowly
slowly
Slowly.
slowly
The opposite of quickly is... slowly.
Slowly by cellular respiration, quickly by combustion (burning).
slowly
slowly
slowly
Slowly
Rapidly
Snails run slowly