Question

question 1 0.34 pts
what is meant by the term strata when describing sedimentary rocks? please focus on what strata means.

• strata are sedimentary deposits created by pressure.
• strata are sandy sedimentary rocks.
• strata are sedimentary rocks composed of limestone and other rocks precipitated from solution.
• strata are layers composed of the same type of sedimentary rock in a thickness that is typically measured in tens of meters or more.

question 2 0.34 pts
rocks, minerals, rocks, minerals. i always hear them used together. what is the difference between them?

• minerals are light in color, but rocks can have any color.
• a mineral is always smaller than a rock.
• a specific mineral type always has the same chemical composition and structure. however, rocks can be made up of lots of different types of minerals.
• they are actually the same thing, so it is no wonder you hear them used together.

Explanation:

For Question 1: Strata refers to distinct, horizontal layers of sedimentary rock formed over time by deposition, compaction, and cementation. The correct option matches this definition of layered sedimentary rock units.
For Question 2: Minerals are naturally occurring, inorganic solids with a definite chemical composition and crystalline structure. Rocks are aggregates of one or more minerals (or mineral-like substances), so they can be composed of multiple different mineral types.

Answer:

Question 1: Strata are layers composed of the same type of sedimentary rock in a thickness that is typically measured in tens of meters or more.
Question 2: A specific mineral type always has the same chemical composition and structure. However, rocks can be made up of lots of different types of minerals.