SkillAcePro manages 5 data types including quiz results. Helps you organize, track, and share your work in 1 place for teams and solo users.

🔬

Interactive Grade 8 Science Sedimentary Rocks & Fossils Worksheet

Science · Grade 8 · 15 questions

Auto-marked · instant feedback · no account needed

Sedimentary Rocks & Fossils

What is 'compaction' in the context of sedimentary rock formation?

A.The process where minerals crystallise directly from solution to form rockB.The process where the weight of overlying sediment squeezes water and air out of lower layers, pressing grains togetherC.The process where magma cools and solidifies into rockD.The process where existing rock is chemically dissolved and re-deposited elsewhere

Which of the following best describes 'cross-bedding' in sedimentary rocks?

A.Horizontal layers of alternating mineral compositionB.Inclined layers within a larger rock unit, formed by the movement of sand dunes or underwater currentsC.Vertical fractures cutting through rock layers caused by tectonic stressD.Circular patterns formed when sediment is deposited around a central point

A student reads that a particular rock layer contains fossils of organisms that only existed during a very specific 5-million-year window in Earth's history, and these fossils are found worldwide. What makes this type of fossil particularly useful to geologists?

A.It proves the rock formed from volcanic activityB.It allows geologists to date and correlate rock layers across different locations with great precisionC.It shows that the organism was very large and therefore easy to findD.It indicates the rock layer is always located at the surface

Start to see all 15 questions

You're previewing the first 3 questions. Press start to reveal the full worksheet and begin.