It depends, really. A rock's friability is the ability of a rock to easily be broken into smaller pieces(easy in the sense of hitting it with your hand).
Whether or not a rock can burn is based more off of a rock's composition. For example, coal will burn, quartz will not. Rocks made up of organic material(coal, peat, lignite, oil shale) will burn - hence, fuel.
A rock can, though, be organic and friable. So its possible to have a friable rock that can burn. But ignition isn't dependent upon friability.
slateschist
A rock that is extremely flaky and breaks easily is likely to be shale. Shale is a sedimentary rock made up of fine-grained clay minerals that easily split into thin layers.
Limestone is the type of rock that is most easily dissolved by slightly acidic groundwater. This is due to its high calcium carbonate content, which can be easily weathered and eroded by the acidic water, causing the rock to dissolve over time.
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?
Basalt is an igneous rock with low silica content that flows easily due to its low viscosity when molten. It often forms from volcanic eruptions and is found in oceanic crust and volcanic islands. Basalt is dark in color and fine-grained, with a composition of around 45-52% silica.
The sense of friable is "can be easily grinded".
My dictionary says: "Easily crumbled, brittle" Friable means - easily reduced to powder. It is most often used in the context of surgery to describe tissue that is diseased/weak/thin.
Friable tissue means that it is easily crumbled or broken apart. This usually indicates that the tissue is fragile, brittle, or easily disrupted.
A friable colon is one that is easily upset or irritated. It can become swollen and could lead to colon disease.
"Friable" describes the condition of tissue that is easily broken or torn. That can be the result of infection or damage to the tissue from injury or disease. For example, the skin of a scleroderma patient that it is very taut and "stretched thin" can be easily damaged. That tissue would be called friable.
Materials containing asbestos are considered to be friable if they can be easily crumbled, pulverized, or reduced to powder by hand pressure when dry. Friable asbestos poses a higher risk of releasing harmful fibers into the air compared to non-friable asbestos-containing materials.
Friable means easily crumbled or broken.
Friable means to be easily crumbled into a powder. A friable surface in painting would indicate that it is chalky or peeling in such a way that the paint will not adhere to the substrate. You need to remove/clean the friable surface appropriately or you will find that the paint sticks to the decomposing surface and not to the underlying item that is expected to be painted. In a short period of time the new coating will begin to flake off.
Non-friable asbestos materials are bound together with a binding agent, making them less likely to release asbestos fibers into the air when left undisturbed. These materials are generally considered safer than friable asbestos materials which can easily crumble and release fibers into the air.
A friable callus is a callus formation that has grown with the cells further apart. When a callus is not friable, it is dense and compact and when it is used to regenerate plant tissue, it grows into a lump and doesn't grow to a viable plant. A friable callus, however, allows the regenerating tissue to grow suspensions.
An asbestos material is considered friable when it can be easily crumbled or reduced to powder with hand pressure. This typically occurs when the material is damaged, deteriorated, or disturbed, releasing asbestos fibers into the air where they can be inhaled and pose a health risk.
Lava does not burn rock because rock is not flammable.