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How rocks can be identified by hardness?

The hardness of a rock is identified using Mohs Scale of Hardness. Certain rocks and minerals have a predetermined hardness level based on this scale, which uses the obvious logic that if something scratches something else, then it must be harder than that which it scratches. Likewise, if something doesn't scratch something else, it must be softer than that which it cannot scratch. Using a scale from 1 to 10, common objects can be used to determine hardness level. A fingernail, for example, has a hardness of 2.5. Any rock that can be scratched by a fingernail (talc, for example) has a hardness less than 2.5. A streak plate, which is commonly used for hardness tests, has a hardness of 6.5. Diamonds, the hardest minerals, define the 10 on the hardness scale. Using these common objects and their related hardnesses, one can easily identify the rock in question.


Can copper scratch other rocks and minerals?

I would say not likely. Most metals are rather soft in their pure form. One of the most distinguishing characteristics about metals is that they are sectile, or easily cut with a knife. Silver has a hardness (on the Mohs scale) of 3. That is probably not going to scratch many other minerals.


What part of the plant gives off oxygen?

The leaves of a plant are responsible for releasing oxygen into the atmosphere through the process of photosynthesis. During photosynthesis, plants take in carbon dioxide and water and, with the help of sunlight, convert these into glucose and oxygen.


What is the hardness of a mineral that scratches gypsum?

The mineral that scratches gypsum has a hardness greater than 2 on the Mohs scale. Gypsum has a hardness of 2 on the Mohs scale, so any mineral that can scratch it must have a hardness greater than 2.


What does he who is afraid of the leaves must not go into the forest mean?

This isn't actually a proverb; it is a quote from Leo Tolstoy's short story, The Two Brothers.In the context of the story, two brothers come across a stone that tells them that they must steal the cubs from a she-bear and run up a mountain to find happiness. The younger brother wants to do what the stone says, but the older brother desists, telling him that "A bird in the hand is worth two in the bush."The younger brother replies:I have heard: "He who is afraid of the leaves must not go into the forest."In short, he belittles the older brother's caution. This quote is believed by many to mean "If you are afraid of the little things in life, you are likely to miss the big picture, or the big catch."Some misinterpret it as "You need to overcome your fears by facing them", but the context suggests otherwise.

Related Questions

How rocks can be identified by hardness?

The hardness of a rock is identified using Mohs Scale of Hardness. Certain rocks and minerals have a predetermined hardness level based on this scale, which uses the obvious logic that if something scratches something else, then it must be harder than that which it scratches. Likewise, if something doesn't scratch something else, it must be softer than that which it cannot scratch. Using a scale from 1 to 10, common objects can be used to determine hardness level. A fingernail, for example, has a hardness of 2.5. Any rock that can be scratched by a fingernail (talc, for example) has a hardness less than 2.5. A streak plate, which is commonly used for hardness tests, has a hardness of 6.5. Diamonds, the hardest minerals, define the 10 on the hardness scale. Using these common objects and their related hardnesses, one can easily identify the rock in question.


What does it mean if you have itchy breasts?

that you must scratch them.


How do you make a pie from scratch?

If you wish make an apple pie from scratch, you must first invent the universe.


What are the official pool scratch rules that must be followed?

Official pool scratch rules must be followed to ensure fair play. These rules typically include guidelines on how to properly scratch the cue ball, how to handle fouls, and how to handle the cue ball after a scratch. It is important for players to familiarize themselves with these rules to avoid penalties during gameplay.


Which mineral on the mohs scale will scratch apatite?

Minerals that will scratch apatite must be more than a 5 on the Moh's hardness scale. So feldspar, quartz, topaz, corundum, and diamond will scratch apatite.


How can you tell gold from other shiny rocks?

you must take scratch card or paper or something and scratch it. if it is gray, gold, or something like that, its gold


How would one scratch vinyl records on plastic decks?

In order to begin to scratch vinyl records one must purchase a turntable in order to edit the record. One must also learn professional DJ lessons, and music theory.


Why is neon lights mean to vinyl scratch?

The answer is because its just a thing boys do. They pick on the girls because they like them. So Neon Lights must have a crush on this Vinyl Scratch.


Can you put the cue ball anywhere on the table after a scratch in pool?

No, after a scratch in pool, the cue ball must be placed behind the headstring (imaginary line across the table) for the next shot.


The purple leaves on your wandering Jew have turned green What must you do to get the purple leaves back?

more sunlight


How come guitar hero keeps saying the game disc could not be read?

There must be a scratch on the disc.


What are the rules for scratch pool?

In scratch pool, players must hit the cue ball into the object balls in numerical order. If a player fails to hit the correct ball first, it is a scratch and the opponent gets ball in hand. The game is won by pocketing all the object balls in order.