Question

sandstone is a sedimentary rock. which two processes cause sand particles to form sandstone?
cementation and cooling
compaction and cementation
cooling and erosion
erosion and heating

Explanation:

Sedimentary rocks like sandstone form when sediment (such as sand particles) undergoes compaction (where the sediment is squeezed together under pressure) and cementation (where minerals act as a "glue" to bind the sediment particles). Cooling is related to igneous rocks (from magma/lava cooling), erosion is the process of wearing away rocks/soil, and heating (in the context of rocks) is more relevant to metamorphic rocks (formed under heat and pressure). So, compaction and cementation are the key processes for sandstone formation.

Answer:

compaction and cementation