How Sandstone Arches Form

Start with Correlate Rock Layers Using Index Fossils to build rock layer vocabulary, then use the arch and river sheets for processes. Each sheet has a passage on page 1 that students can reread.

Order five drawings to show how a sandstone arch forms, then sort eight steps into a table. The directions on the page read: Read the passage. The five drawings are out of order. Write 1 to 5 in the boxes to show the order in which an arch forms. An answer key is included.

Yes, both. We made it for 7th grade Earth science, and it works the same at home or at school. At home, a student can work through it alone and then go over it with you, which shows quickly what is solid and what needs another look. In class it works as independent practice, homework or a warm-up, and you can print one copy or a full set.

It is a fossil of a species that lived for a short time but spread over a wide area. Layers that hold the same index fossil formed at about the same time. Correlate Rock Layers Using Index Fossils has students match layers and find one that is missing.

Flowing salt pushes the layers above it into domes and cracks the sandstone. Water, frost and wind then widen the cracks over time. How Sandstone Arches Form has students order five drawings and sort eight steps.

Fast water can carry large particles, so a river lifts more from the bed. Slower water carries only smaller ones and drops some. River Processes From Source to Delta has students mark E or D at eight sites.