Final answer:
Sedimentary rocks are formed from sediment, whereas crude oil is formed from organic matter.
Step-by-step explanation:
Sedimentary rocks are made from the accumulation and lithification of grains of material, such as pieces of igneous rock or the shells of living things. Common sedimentary rocks include sandstone, limestone, and shale.
These rocks often start as sediments carried in rivers and deposited in lakes and oceans. When buried, the sediments lose water and become cemented to form rock. Organic sedimentary rocks, on the other hand, form from the accumulation of organic matter, such as leaves and other plant or animal material.
Crude oil, also known as petroleum, is formed from the remains of ancient marine plants and animals that have been subjected to heat and pressure over millions of years.
It is a mixture of hydrocarbons that exists in liquid phase in natural underground reservoirs and remains liquid at atmospheric pressure after passing through surface separating facilities.