Talc - softest
Gypsum
Calcite
Fluorite
Apatite
Orthoclase feldspar
Quartz
Topaz
Corundum
Diamond -hardest
The resistance of a mineral to being scratched is known as its 'hardness'. This is a relative measurement determined by whether it scratches, or is scratched by, other materials of determined hardness. Hardness is measured on the Mohs scale. To give to some idea, diamond (the hardest known mineral) is a 10, while talc (the softest) is 1. A copper coin is around 3, a fingernail is around 2, an iron nail is around 5. Quartz, for example, is a 7.
The resistance of a mineral to being scratched is known as its 'hardness'. This is a relative measurement determined by whether it scratches, or is scratched by, other materials of determined hardness. Hardness is measured on the Mohs scale. To give to some idea, diamond (the hardest known mineral) is a 10, while talc (the softest) is 1. A copper coin is around 3, a fingernail is around 2, an iron nail is around 5. Quartz, for example, is a 7.
as part of my science homework we have to give an example of a rock which is soft and easily scratched but I don't know what rock that is please help?
The major groups of minerals are silicates (e.g., quartz and feldspar), carbonates (e.g., calcite and dolomite), sulfides (e.g., pyrite and galena), oxides (e.g., hematite and magnetite), and sulfates (e.g., gypsum and barite).
Using Mohs scale of hardness for minerals, you can--with a bit of detective work--find out the hardness of Granite, Limestone and Marble.But I think that we can do a bit of reasoning and figure out for ourselves the order of hardness for these stones.First off, knowing that Limestone is a sedimentary stone, Granite is a metamorphic stone and Marble is igneous stone, can give you some idea how these stones measure against each other in hardness.Alright, sedimentary stone is laid down, layer on top of layer, until it compresses enough to create a stone. Then igneous stone is created by magma being cooled and becoming a solid stone. Metamorphic stone is changed--with pressure and heat, creating a metamorphosis to another stone entirely.Thinking how each of the stones, which do you think would be the softest, the hardest, then the one left would be between the two others.I would deduct that Limestone would probably be the softest, as it is layer upon layer--not really going through much change or pressure to become Limestone. Now, to figure out which of the two left over might be the hardest. I would suggest the stone which has gone through the most heat and pressure would be the hardest. The stone which qualifies as the most changed, would be the metamorphic rock, Granite. What you have left over, is the igneous rock, Marble. To check if that truly would be the middle hardness, it was created with heat, which would be more "processing" than just layered like Limestone, but wasn't as "processed" as heat AND pressure as Granite was. So it appears that Marble would fit between Limestone as the softest, and Granite as the hardest.Now you have deduced how to determine the order of hardness between Limestone, Marble and Granite.
You can review the site below, to read the ranking of the hardest minerals. Other contributors can add other details to give you additional scientific scales of hardness.
The resistance of a mineral to being scratched is known as its 'hardness'. This is a relative measurement determined by whether it scratches, or is scratched by, other materials of determined hardness. Hardness is measured on the Mohs scale. To give to some idea, diamond (the hardest known mineral) is a 10, while talc (the softest) is 1. A copper coin is around 3, a fingernail is around 2, an iron nail is around 5. Quartz, for example, is a 7.
Some minerals include stuff you might have in your cereal like iron and zinc.
Giving it all means trying your hardest to do the best job you can. Examples of people who give it all are athletes, entrepreneurs, soldiers and doctors.
In addition to color, four other properties to help identify minerals are hardness, luster, streak, and cleavage. Hardness measures a mineral's resistance to scratching, exemplified by the Mohs scale, where talc is the softest (1) and diamond is the hardest (10). Luster describes how a mineral reflects light; for example, quartz has a vitreous luster, while gold has a metallic luster. Streak refers to the color of a mineral's powder, as seen when a mineral is scraped on a ceramic plate, with hematite leaving a reddish-brown streak, and cleavage indicates how a mineral breaks along specific planes, as demonstrated by mica, which splits into thin sheets.
The resistance of a mineral to being scratched is known as its 'hardness'. This is a relative measurement determined by whether it scratches, or is scratched by, other materials of determined hardness. Hardness is measured on the Mohs scale. To give to some idea, diamond (the hardest known mineral) is a 10, while talc (the softest) is 1. A copper coin is around 3, a fingernail is around 2, an iron nail is around 5. Quartz, for example, is a 7.
I had not given a hardest interview like this one you give
minerals give us energy from vegatables.
nicotine.
as part of my science homework we have to give an example of a rock which is soft and easily scratched but I don't know what rock that is please help?
That's not a question, if you wanted to make it a question, you should have said "Can you give a name of a non metallic mineral?"
I think the 3 hardest word for my experience is " I am sorry'.