Question

1. choose the correct answer.

describe how sedimentary rocks are formed through chemical formation.
by the cooling and hardening of lava
by the accumulation and compaction of organic materials
by the dissolving and precipitation of minerals in water
by applying heat and pressure to existing rocks

1. choose the correct answer.

____ is a very common chemically formed sedimentary rock.
marble
slate
granite
limestone

Explanation:

Question 9

• Option 1: Cooling/hardening of lava forms igneous rocks, not chemical sedimentary.
• Option 2: Accumulation of organic materials forms organic sedimentary rocks, not chemical.
• Option 3: Chemical sedimentary rocks form when minerals dissolve in water and then precipitate (e.g., from evaporation or chemical reactions), matching chemical formation.
• Option 4: Heat and pressure form metamorphic rocks.

• Marble: Metamorphic (formed from limestone under heat/pressure).
• Slate: Metamorphic (formed from shale).
• Granite: Igneous (formed from cooled magma).
• Limestone: Can form chemically (e.g., from mineral precipitation in water, like calcium carbonate from marine environments) or organically, and is a common chemically formed sedimentary rock.

Answer:

by the dissolving and precipitation of minerals in water

Question 10