Compare the characteristics of sedimentary and igneous rocks and select the correct statement.

Sedimentary rocks are formed by cooling of magma; igneous rocks by deposition of sediments.

Igneous rocks often contain fossils; sedimentary rocks do not.

Sedimentary rocks are typically layered; igneous rocks are usually crystalline and non-layered.

Both sedimentary and igneous rocks form under high pressure and temperature conditions.

In a scenario where sandstone is used for paving in a region with frequent freeze-thaw cycles, which property of sandstone is most critical to ensure durability?

Low water absorption and good frost resistance

High elasticity to accommodate expansion

High thermal conductivity to dissipate heat

Compare granite and sandstone in terms of their suitability for load-bearing structural elements in buildings.

Granite has higher compressive strength and lower porosity than sandstone, making it more suitable.

Sandstone has higher compressive strength and is more durable than granite.

Both stones have similar strength and porosity, so either can be used equally.

Granite is softer and more porous than sandstone, making sandstone preferable.

How does the mineral composition of granite influence its durability and appearance in construction?

High quartz content increases hardness and gives a shiny appearance

High clay content makes granite more porous and weak

High calcite content causes granite to dissolve easily

High organic matter content improves granite's strength

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A construction project requires marble tiles with a compressive strength of at least 70 MPa. If a sample marble has a compressive strength of 65 MPa, what should be the best course of action?

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