Soil Introduction

Presentation

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Science

•

9th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-ESS2-5

Standards-aligned

Rebecca Turner

Used 78+ times

FREE Resource

6 Slides • 9 Questions

Soil Introduction

45% minerals and nutrients*
25% air filled pore spaces
25% water filled pores spaces
5% organic matter

Ideal Soil Composition

*Will be the focus of our lab.

Multiple Choice

What percent of the soil is minerals and nutrients?

25%

45%

50%

Multiple Choice

What percent of the soil is pore spaces?

25%

45%

50%

Multiple Choice

What part of the soil will we be looking at in lab?

Minerals and nutrients

Air filled pore spaces

Water filled pore spaces

Organic matter

2.0 - 0.05 mm

Sand

0.05 - 0.002 mm

Silt

Less than 0.002mm

Clay

Soil Types

Soil characteristics are based on particle size.

Reorder

Arrange the following soil types from the smallest particles to the largest.

Clay

Silt

Sand

Particle Size Effects

Water and nutrient hold capacity: how much water and nutrients (nitrates & phosphates) and the soil can hold onto
- Increases as particle size decreases
Workability: the measure of how easily the soil can be used for specific reasons (AKA - How easily it can be plowed / farmed)
- Increases as particle size increases
Aeration: the gas exchange rate
- Increases as particle size increases

Multiple Choice

What type of soil would have the greatest nutrient holding capacity?

Sand

Silt

Clay

Multiple Choice

What type of soil would have the greatest aeration?

Sand

Silt

Clay

Multiple Choice

What type of soil would have the least workability?

Sand

Silt

Clay

Most soil is not

100% Clay, Silt, or Sand.

Most soil is a mixture. In fact,

the best soil for farming is loam,

a mixture of all three.

Textural Triangle

LOAM

40% Sand

40% Silt

20% Clay

Multiple Choice

When finding the percentage of clay, you would read the textural triangle...

straight across from left to right starting on the left side of the triangle.

up towards the left starting from the bottom of the triangle.

down towards the right starting from the left side of the triangle.

Multiple Choice

When finding the percentage of sand, you would read the textural triangle...

up towards the right starting at the bottom of the triangle.

down towards the left starting from the right side of the triangle.

up towards the left starting from the bottom of the triangle.

Soil Introduction

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