I dentify the change happening in each situation. On the space provide before each number, draw a smiling face if the change is an example of mechanical weathering and sad face if it is an example of chemical weathering.

1. A boulder of shore is slowly broken apart by the force of water.
2. Earthworm makes tunnels in the ground which may lead to the breakdown of stones and rocks.
3. Some plants release chemicals which loosen the rocks and cause them to break.
4. Water inside the rocks freezes and melts again.
5. The chemical composition of rocks changes when acid is produced by the roots of some plants.
6. Minerals in rocks dissolve.
7. Tree roots can grow into cracks and break rock apart.
8. As the wind blows, it carries sand or small rock particles that scratch the rock's surface.
9. As the rocks expand, the cracks become deeper and new cracks are produced,
10. Rocks exposed to the intense heat of the sun crack and crumble when rain falls or soak in the​ ground.