The phrase “what happened to the strips of clay” is most commonly from a simple science or earth‑science activity where two strips of clay are pushed toward each other from opposite ends to model how Earth’s crust behaves. In that setup, the strips of clay usually bend, crumple, and form folds, and may crack or even break if the pressure is too strong.

Core idea in one line

When the strips of clay are pushed from opposite ends, they deform : they bend and buckle into folds, and if the force is large enough, they crack or fracture.

What physically happens to the clay

  • The clay strips are compressed, so they shorten and thicken rather than staying flat and smooth.
  • This compression makes them bend and buckle , creating visible folds or ripples along the joined area.
  • If the pushing force goes beyond what the clay can withstand, it can fracture , forming cracks or even breaking into separate pieces.

In many classroom explanations, the bending and buckling is the key observation the question is asking for, with cracking as an extra effect if “too much” force is applied.

Why teachers use this question

  • The strips of clay are used as a model for Earth’s lithosphere (the rigid outer layer).
  • Pushing the strips from opposite ends stands in for tectonic plates colliding at convergent boundaries.
  • The folds that appear in the clay are an analogy for folded rock layers and mountain building when plates push into each other.

So if you are answering this as a school question, a complete, concise answer would be something like:

The strips of clay were compressed so they bent and buckled, forming folds, and with stronger force they could also crack or break apart.

TL;DR:
They did not stay flat. They got shorter and thicker, bent and folded, and under strong pressure they cracked or fractured.

Information gathered from public forums or data available on the internet and portrayed here.