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Rocks in Time

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Rocks in Time

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About this activity

How sand becomes stone over ages.

Created by

Courtney Bezdek
Courtney Bezdek
United States

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Rocks in Time
 

Rocks in TimeOnline version

How sand becomes stone over ages.

by Courtney Bezdek
1

I am formed when countless grains of sand are pressed and cemented together over long ages; heat and mineral-rich fluids help me gain strength.

Hints

The word suggests it is made from sand plus stone.

A common sedimentary rock found in deserts and layers of cliffs.

Built from sand grains stuck together.

2

Rocks formed by deposited materials layering and compacting together over time.

Hints

Often contains fossils or remains of once-living things

Pressure from overlying layers compacts and cements the grains

Forms from bits that settle out of water or air

3

Rocks formed near the surface over time

Hints

Created by deposition and compaction at or near the surface

Common types include sandstone, shale, and limestone

Built from particles and remains of other materials

4

Rocks or mineral fragments detached from a larger rock.

Hints

Term describes a piece broken off from a rock.

Used in geology to classify pieces of sediment by size.

5

I appear as flat, repeating layers in a rock, hinting at its story across time.

Hints

I am the defining feature of many rocks formed from settle sediments.

Each sheet may reflect a different environment or moment in history.

I show up as layers or bands.

6

This rock forms when minerals crystallize as seawater dries up.

Hints

A type of sedimentary rock

Includes salts like rock salt

Results from evaporation of seawater

7

Made from skeletons and shells of sea creatures

Hints

I am a type of limestone and am part of the sedimentary rock family

I am made from calcium carbonate

8

I am made from fossils or remains of plants and animals

Hints

I am part of the sedimentary rock family

 
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