The correct answer is option D
Hardness refers to how a mineral substance responds to or resists scratching by another mineral substance. Hardness is plays a vital role to help determine and identify a mineral substance.
In hardness, if substance X scratches substance Y and substance Y does not scratch substance X, then substance X is harder than substance Y. This is the case of fluorite and apatite. Apatite is harder than fluorite, therefore, it scratches fluorite and fluorite doesn’t scratch apatite.
Apatite cannot scratch quartz because quartz is known to be harder than apatite. This is a way to tell quartz and apatite apart.
Hope this helps.
The most unreliable source is B. Color. This is unreliable because stones and minerals are always exposed to a lot of properties. For example, when the mineral is exposed to weathering, it is already expected that the stones and minerals will suddenly change its color.
In order to check the type of mineral available, streak can be referred to in order to know the actual color of the mineral that is being identified. Hardness is a reliable source and this is one of the characteristics that are checked by professionals to determine the type of mineral available. Luster may be used from time to time.
Just like there is a water cycle, there is also a rock cycle. The rock cycle is a system of steps that begins with sediments and goes through a period to make magma or a type of rock. These types of stones include igneous rocks, metamorphic rocks, and sedimentary rocks. Therefore, if a rock came from sediments, then it becomes compact.
When it is compacted, then it becomes a sedimentary rock. Igneous rock could change based on heat and pressure. When the molten rock is warmed up, it could become another rock. If the metamorphic rock is melted, then it could become magma. One of the steps in the water cycle that is not in the rock cycle is condensation.
Mineral is an INORGANICsolid substance with a definite chemical composition and atomic arrangement . A rock is a solid mixture of two or more minerals.
A mineral has a range of properties that define it. It can be thee density, the color, the streaks, luster and hardness. The chemical properties of the mineral are the certain indicators of its identity. However, the color is the most inconsistent feature. Hence, you cannot rely on color alone to classify different minerals. The same mineral can have different colors due to its composition.
A small difference can result in a major color change which makes it an inconsistent feature to identify or classify minerals. Yes, there is a standard color that relates with most minerals, but it is the shade that the mineral is found in usually, but there can be differences.
The density of something is found by dividing the mass of the object by the volume. This tells us how much mass is in unit area of the object. However, if you need to find the mass from the density, you can easily rearrange the equation. Now, you need to multiply the volume of the object with its density.
This will give you the total mass of the object. Calculating the volume is easy enough. You can measure it, if it is a geometric object. If not, you can calculate it by dipping it in a measuring cylinder with water and then calculating the difference.