Final answer:
Sedimentary rocks, including types like sandstone, shale, and limestone, are indeed solid at room temperature, having been formed from materials deposited and then cemented together over time.
Step-by-step explanation:
Yes, sedimentary rocks are solid at room temperature. They are formed through the deposition of material at the Earth's surface and within bodies of water. Over time, this material accumulates in layers and is cemented together by the precipitation of minerals within the pores of the sediments, becoming solid rock.
Sedimentary rocks include common types such as sandstone, shale, and limestone. A good example is the way sand can be compressed and cemented to form solid sandstone. The color, grain size, and composition of sedimentary rocks can give us clues about their depositional environment and history.