Georgia S3E2.b

Science3rd GradeEarth and Space Science

The Standard

Develop a model to describe the sequence and conditions required for an organism to become fossilized.

Georgia Standards of Excellence for Science · Obtain, evaluate, and communicate information on how fossils provide evidence of past organisms.

Teacher's field guide

What Students Need to Do: Students build and explain a labeled model that puts fossil formation events in order. They show how burial, sediment buildup, pressure, minerals, and erosion affect remains over time.
What Mastery Looks Like: A student can place death, rapid burial, decay, sediment buildup, mineral change, and later exposure in a sensible order. The student explains why quick burial and limited disturbance make fossilization more likely.
Common Misconceptions: Students may think every dead organism becomes a fossil or that fossils form in days. They may picture fossils as unchanged bones only, missing molds, casts, traces, and the role of minerals.
How to Assess It: Exit ticket: Draw a four-panel model showing an organism becoming a fossil, and label two conditions that make preservation more likely. Explain why rapid burial matters.

Lesson moves

Build sediment layers in clear cups with sand, soil, and a shell, then label burial, compaction, mineral change, and exposure.
Discuss why a fish buried quickly in mud is more likely to fossilize than a rabbit left on open ground.
Teams race to arrange fossilization event cards, then remove one condition card and explain how the outcome changes.
Use a museum fossil photo to identify preserved parts, infer burial conditions, and sketch how erosion may have exposed it.

Free download

A ready-to-print activity worksheet aligned to S3E2.b, with an answer key for the teacher on its own page. No account needed.

PDF, US Letter, prints cleanly in black and white.

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