Rocks and SoilWhere soil comes from, and the three kinds of rock.2nd GradeSoil is broken-down rock mixed with theremains of dead plants and animals. Ittakes centuries to make.Igneous rock cools from melted rock — granite, basalt.Sedimentary rock is squashed layers — sandstone, chalk.Metamorphic rock is changed by heat and pressure — marble,slate.Wind, water and ice break rock into smaller and smaller pieces.Worms and fungi turn dead leaves into the dark part of soil.One centimetre of topsoil can take hundreds of years to form.LOOK FOR ITSand, silt and clay are all just rock ground to different sizes.Soil is not dirt. It is a living mixture, and almost all our fooddepends on it.Rocks and Soilwww.littleactivity.com

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Science · 2nd Grade

Rocks and Soil

Where soil comes from, and the three kinds of rock.

How to use it

Dig a small hole and look at the layers. They are genuinely visible.

Free · print-ready PDF · US Letter and A4

Grade
2nd Grade
Ages
7–8
Subject
Science
Pages
1

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