When you don't really change something except in this case it has been made smaller, it is a physical change. If you grind down a diamond into small diamond particles, you still have a diamond but in smaller bits.
you should talk about how crystals are formed and what type of crystals there are
In order for something to be considered a change some sort of change must occur. A crystal is an object, not a type of change. Dark violet iodine crystals are pieces of relatively pure elemental iodine.
Grinding and smashing of food is called mechanical digestion as there is no change in the food but the size of the pieces.
Warming crystals in water can cause them to dissolve or react with the water, depending on the type of crystal. Some crystals may release substances into the water, change color, or form a solution. It is important to know the properties of the crystals beforehand to predict the outcome accurately.
It could make a grinding type noise when moving slow. A "whirrr" type whine when moving faster. The grinding noise may change to a clunking noise when turning the wheel. Any of these noises means "fix me now or else."
a saturated solution will form crystals
Bonded Grinding Wheels for Metals are available in Straight Wheels, Cup Type, Discs Type, Soser Type, Large Inside Dia Specific Type etc.
That depends under the right conditions a cubic meter of sand can weigh exactly the same a ton, however this can change depending on the type of sand ot the amount of water in it.
the names of the types of crystals found in france?
Parrotfish are known for excreting sand as part of their digestion process. They feed on coral and other hard substrates, grinding up the material in their strong beaks and digesting the nutrients. The indigestible parts are then expelled as sand, contributing to the formation of sandy environments on coral reefs. This unique process plays a role in marine ecosystems and beach formation.
it depends what type of rock you have really, if you have a rock with crystals in it wont have sand in, if you have a pourous rock it wont have sand in either, but if you have a rock with grains you may find sand in the rock! Answered by a 12 year old lolz +++ Pretty much right - well done! You do have certain types of rocks ('sedimentary rocks') with sand in them, formed from earlier deposits of sand; but the sand itself is grains of hard minerals remaining from harder rocks that have been eroded away. So the rock with crystals does not have sand in it, but when weathering breaks that rock down, the crystals are left as grains of sand.
When you heat copper sulfate, it undergoes a physical change where it loses its water of hydration, turning from blue crystals to a white powder (anhydrous copper sulfate). This change is reversible, as adding water to the white powder will turn it back to blue crystals.