Mississippi Science E.8.7.1
The Standard
- E.8.7
- Students will demonstrate an understanding of geological evidence to analyze patterns in Earth’s major events, processes, and evolution in history.
Use scientific evidence to create a timeline of Earth’s history that depicts relative dates from index fossil records and layers of rock (strata).
2026 Mississippi College- and Career-Readiness Standards for Science · Earth’s Structure and History
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students read rock layers from bottom to top to work out which formed first. They use matching index fossils to connect layers in different places, then draw a timeline from oldest to youngest.
What Mastery Looks Like
- A student can line up two rock columns using a shared index fossil, even when the columns have different numbers of layers. They can explain the order using each layer’s position, without making up dates in years.
Common Misconceptions
- Students may think the top layer is oldest or that layers with the same color formed at the same time. They may add exact dates when the evidence only shows relative order.
How to Assess It
- Give students two columns: A has a fern layer below a spiral-shell layer; B has a spiral-shell layer below a fish layer. Ask them to draw a three-part timeline and explain how the shared shell helped.
Lesson moves
Ways to Teach It
Stack colored paper strips as rock layers, add matching fossil stickers to two stacks, then arrange the layers on a timeline.
Ask students to write why two matching fossil layers can appear at different heights in two rock columns.
Give pairs rock-column cards and a fossil key; have them race to order the layers and point to evidence for each choice.
Use a marked-up road-cut photo and a drill-core sketch; have students match fossils and trace a layer between the two sites.
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Printable E.8.7.1 Worksheet
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