Question
How are sedimentary rocks formed?
From the remains of plants and animals
By volcanic eruptions
Through intense heat and pressure
By cooling of molten lava
From the remains of plants and animals
By volcanic eruptions
Through intense heat and pressure
By cooling of molten lava
Answers
GPT-4o mini
Sedimentary rocks are formed primarily **from the remains of plants and animals**, as well as from the accumulation and compaction of sediments over time. This can include fragments of rock, minerals, and organic materials that accumulate in various environments, such as rivers, lakes, and oceans. The process involves weathering, erosion, deposition, compaction, and cementation of the sediments.
The other options you mentioned refer to other types of rocks:
- **By volcanic eruptions** refers to igneous rocks, which form from the cooling and solidification of magma or lava.
- **Through intense heat and pressure** describes the formation of metamorphic rocks.
- **By cooling of molten lava** refers again to igneous rocks, specifically extrusive igneous rocks that form when lava cools and solidifies on the surface.
Therefore, the correct answer for sedimentary rocks specifically relates to the accumulation of sediments and remains of biological materials.
The other options you mentioned refer to other types of rocks:
- **By volcanic eruptions** refers to igneous rocks, which form from the cooling and solidification of magma or lava.
- **Through intense heat and pressure** describes the formation of metamorphic rocks.
- **By cooling of molten lava** refers again to igneous rocks, specifically extrusive igneous rocks that form when lava cools and solidifies on the surface.
Therefore, the correct answer for sedimentary rocks specifically relates to the accumulation of sediments and remains of biological materials.