soil power point presentation

8/4/2019 Soil Power Point Presentation

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Soil

Science Term 3 2011


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Brainstorm words about soil

Collect an A3 piece of paper and with thepeople on your table you need to brainstormall the words that we will be using in relation

to soil this term. Make your work as nice as possible as they

will be displayed in the classroom so we canlearn them.

You will be tested on these words as the termprogresses!


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Some words that you may not have

thought about Soil

Nutrients

Organic

Earth

Water

Air

Plants

Combination

Material Ingredients

Chemical

Processes

Garden

Rock

Particles

Heavy

Light

Sandy

Clay

Loam Scientists

Texture

Rough

Edges

Silt


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Words that you should be able to

recognise but necessarily spell (yet!)

Photosynthesis

Nitrogen

Phosphorous

Potassium

Chlorophyll

Peat

Perlite

Vermiculite
http://urbanext.illinois.edu/gpe/glossary/photosynthesis.htmlhttp://urbanext.illinois.edu/gpe/glossary/nitrogen.htmlhttp://urbanext.illinois.edu/gpe/glossary/phosphorous.htmlhttp://urbanext.illinois.edu/gpe/glossary/potassium.htmlhttp://urbanext.illinois.edu/gpe/glossary/chlorophyll.htmlhttp://urbanext.illinois.edu/gpe/glossary/peat.htmlhttp://urbanext.illinois.edu/gpe/glossary/perlite.htmlhttp://urbanext.illinois.edu/gpe/glossary/vermiculite.htmlhttp://urbanext.illinois.edu/gpe/glossary/vermiculite.htmlhttp://urbanext.illinois.edu/gpe/glossary/perlite.htmlhttp://urbanext.illinois.edu/gpe/glossary/peat.htmlhttp://urbanext.illinois.edu/gpe/glossary/chlorophyll.htmlhttp://urbanext.illinois.edu/gpe/glossary/potassium.htmlhttp://urbanext.illinois.edu/gpe/glossary/phosphorous.htmlhttp://urbanext.illinois.edu/gpe/glossary/nitrogen.htmlhttp://urbanext.illinois.edu/gpe/glossary/photosynthesis.html


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How much soil is there?

Pretend that this apple is the planet Earth,

round, beautiful, and full of good things.

Notice its skin, hugging and protecting the

surface.

Water covers approximately 75% of the

surface.


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The three quarters (75%) you just removed

represents how much of the earth is covered

with water - oceans, lakes, rivers, streams.

What is left (25%) represents the dry land.


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50% of that dry land is desert, polar, or

mountainous regions where it is too hot, too

cold or too high to be productive.

When 50% is removed, this is what is left.

(12.5% of the original)


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Of that 12.5%, 40% is severely limited by

terrain, fertility or excessive rainfall. It is too

rocky, steep, shallow, poor or too wet to

support food production.


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You are left with approximately 10% of the

apple.

Peel the skin away


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This is how much soil there is!

The remaining 10% (approximately*)- this

small fragment of the land area - represents

the soil we depend on for the world's food

supply. This fragment competes with all other

needs - housing, cities, schools, hospitals,

shopping centres, land fills, etc., etc. And,

sometimes, it doesn't win.


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What is soil?

The boring stuff! Soil is a thin layer of material on the Earth's surface in which plants

have their roots. It is made up of many things, such as weatheredrock and decayed plant and animal matter. Soil is formed over along period of time.

Soil Formation takes place when many things interact, such as air,

water, plant life, animal life, rocks, and chemicals. The formation of soil happens over a very long period of time. It can

take 1000 years or more. Soil is formed from the weathering ofrocks and minerals. The surface rocks break down into smallerpieces through a process of weathering and is then mixed withmoss and organic matter. Over time this creates a thin layer of soil.

Plants help the development of the soil. How? The plants attractanimals, and when the animals die, their bodies decay. Decayingmatter makes the soil thick and rich. This continues until the soil isfully formed. The soil then supports many different plants.

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