How Fossils Form Guided Notes

Year 3 ScienceRocks3 pages

About this worksheet

Gap-fill guided notes on how fossils form, for Year 3, over three pages with an answer key. The notes start with what a fossil is and why hard parts such as shells and bones last. Three stages follow: sinking and burying, pressure and turning to stone, and exposure and discovery. Each stage has three gap sentences and a picture, from a fish skeleton on the seabed to a palaeontologist brushing a cliff. Written questions ask why fossils take so long to form and where they are found. There is no word bank. The notes follow the England National Curriculum objective on fossils.

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Curriculum objectives covered

Rocks

โ€œDescribe in simple terms how fossils are formed when things that have lived are trapped within rockโ€

All twelve gaps follow one fossil from death to discovery, and the written questions ask pupils to explain the process in their own words.

What's inside this worksheet

What Is a Fossil?

Three gaps on living things, sedimentary rock and shells, and a question on why skin and fur rarely become fossils. A picture shows an ammonite in limestone.

Stage 1: Sinking and Burying

Three gaps on a body sinking to the bottom of a lake, the skeleton left behind, and layers of sand, silt and mud.

Stage 2: Pressure and Turning to Stone

Gaps on the weight of new layers and the minerals that replace bone, then a question on why fossil formation takes such a long time.

Stage 3: Exposure and Discovery

Gaps for sedimentary, erosion and palaeontologist, then pupils name two places where fossils are found today.

How teachers use it

Model in a tub

Press a shell into clay, cover it with layers of sand, and match each step to a stage on the sheet.

Word support

The sheet has no word bank, so write words such as sedimentary and palaeontologist on the board for pupils who need them.

Coast photos

The key mentions the Jurassic Coast. Show photos of its cliffs before pupils answer the last question.

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