To make sand harden, first you need water. Without water, sand is very soft, and soft sand is horrible for making sand castles or any sand sculptures. But if you pour water on sand, then leave it alone for a few hours, it should harden all by itself. But even though the sand is hardened, it is not unbreakeable, so be careful.
It is impossible to cook moon sand to harden it because, as the commercial says, moon sand never dries out.
the kind of sand that is used in sand sculptures is reguler sand just with a touch of water so it may harden just like if you have dry sand then you cant do anything when it is wet you may sculpt.
Limestone
Moon sand is a type of toy sand that sticks together because it is coated with a special substance like dimethicone. This coating reduces the friction between the sand particles, allowing them to move more freely and stick together easily when squeezed or molded.
Mortar has fine rock called, "Sand" in it. There is also finely pulverized limestone in it that helps harden it.
Sedimentary rock is formed from compacted and cemented sediments, including those from sand deposits. Over time, the pressure from layers of sediment can cause the sand particles to stick together and harden into rock. This process can take millions of years to complete.
To turn sand into glass, it needs to be heated to around 1700 degrees Celsius (3090 degrees Fahrenheit). This high temperature melts the sand and fuses the silica together, creating glass. The molten glass can then be shaped and cooled to harden into the desired form.
Concrete is composed of water, cement and sand. It has three constituents. Concrete is mixed as a wet mixture, poured into place and allowed to harden and dry.
The present tense of "harden" is "harden." For example, "The clay hardens as it dries."
The binder in concrete is usually cement. Cement causes the aggregate and sand to bind together mechanically and harden to make a solid surface.
Yes, harden is a verb.