Lesson 10 | Lesson 13

Have You Seen Sand or Clay Today?    

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This lesson accompanies STC Soils Lesson 5

Have you ever played with sand?  Have you made [1] with clay?  Human beings have always been [2] about soil.  A long time ago, people thought about soil and got an idea.  Maybe they could turn  [3] into something pretty or strong.  So, they experimented.  They found many ways to use sand and clay.

Have you ever seen a brick house?  That  [4] is made of clay.  [5] are made by shaping wet clay.  In the United States, most bricks are baked in a special  [6] .  As the bricks are baking, the clay gets hard.  

Some American Indians make a different kind of brick.  It is called  [7] .   Indians have used adobe for a very long time.  To make adobe, the Indians mix clay with [8] . Then, they let the adobe bricks dry in the sun.  The heat from the [9] bakes the adobe and makes it very hard.   

People like brick because it is [10] .  It can last a long time.  Once a Chinese emperor wanted to protect his land.  So he put a big [11] around his country.  His wall was made of stones and bricks.  Some of his bricks were baked in an oven.  Some were baked in the sun.

What else can you do with clay?  Lots and lots of things.  You can roll clay.  You can press it flat.  You can shape it any way you want.  Artists love clay.  They can turn [12] into a mask or a plate or a vase.  Has anyone ever let you hold a fine china cup?  That cup used to be mushy white clay.

Clay is important in our lives.  Sand is important, too.  What if our world did not have sand?  There would be no [13] .  No concrete sidewalks or concrete bridges.  And think of a world with no windows.  We would have to say goodbye to glass, because glass is made from [14] .

Have you seen sand or clay today?  Look around your room.  How many things can you find that are made from sand or clay?

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