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Lesson Summary Rock strata refers to stacked-up layers of sedimentary rock.

Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used to organize Earth's 4.

The activity helps students to understand that long spans of geologic time can be broken down into more manageable segments by using relative ages.

In the first part of the activity, students are asked to sequence cards by identifying and ordering overlapping letters found on the cards.

— A great unit for kindergarten students that takes them on an exploration of rocks and soil with ideas on investigation, experimenting, observing and getting all of these ideas down into their science journals.

In the second part of the activity, students progress to dating rock layers by sequencing fossils found in the different strata.

Rocks Work Sheets and Coloring Pages for Learning Geology.

Students can weigh, measure and illustrate their pet rock.

Sedimentary strata can even be found atop mountain ranges, where rock layers have been lifted thousands of feet.