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Is opal a element or a compound?
SiO2 .nH2O
Is there such a thing as a purple opal stone?
yes there is.. its called opal royal or morado opal.. indeed its true
What is the opals crystals system?
Opal, being amorphous, is not really a mineral but a mineraloid. One of the scientifically accepted standards defining a mineral is that a mineral must have a crystal structure, which opal lacks. Many scientific groups and references, including the acclaimed Dana's System of Mineralogy, categorize Opal together with the "true" minerals. For this reason, Opal -- as well as other amorphous types that fall under the definition of a mineraloid.
Does rainwater have any minerals?
Pure water has no minerals in it. Water with minerals, such as mineral and tap water, have different minerals depending on the processing process and the location where it was collected.
Can Mercury from the air get into water and build up in fish tissue.?
true
True or false some crystals are formed from minerals dissolved in liquids?
The water contains minerals when it rains and leaves the minerals on the ground when its evaporated
Is it true the density of mercury is 1.36 times greater than density of water?
No.
Is water essential to many of chemical reactions that occur in the body?
Yes. That is true. Water is very good solvent for most of the minerals. Minerals are very essential for the life to sustain. Ions are formed out of minerals in water. Such ionization is essential for most of the chemical reaction to occur. The free flowing ions can readily interact to from new chemicals.
Which planet is too hot to have liquid water?
The planet is Mercury that is true... just trust me
What is the true color of Mercury?
The true color of Mercury is mostly gray.
What valuable mineral starts with O?
Opal, (although it's not a true mineral).
Is it true that stalactites are deposits hanging from cave roofs caused by dripping groundwater?
As water goes through ground, it will to a certain extent dissolve some minerals. When water later drips down inside a cave, the water can actually deposit a little bit of the minerals it is carrying. This results in Stalactites from roof and Stalagmites at ground. It is true.
