Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
Parent Material
|
The C Horizon. This is the third layer of soil. It is the lightest color (gray). There are no nutrients, animals or plant growth. It contains weathered rock and sediment.
|
|
|
Conservation
|
The process of saving or protecting a natural resource.
|
|
|
Topsoil
|
The A Horizon. It is the first layer of soil and the darkest layer of soil. It contains humus, plant roots, small animals, water and nutrients for plant growth.
|
|
|
Subsoil
|
The B Horizon. It is the second layer of soil that is lighter in color (reddish brown) and has fewer nutrients and water. Limited plant growth.
|
|
|
Humus
|
The decayed organic matter in soil.
|
|
|
Decomposer
|
An organism that feeds on and breaks down dead plant or animal matter.
|
|
|
Soil Texture
|
What the soil feels like
|
|
|
Particle Size
|
Gravel is the biggest, then sand, then silt, then clay.
|
|
|
Sand
|
Largest particle size of soil. It is gritty and does not hold water wall- water moves through quickly
|
|
|
Silt
|
Smaller particle size of soil than sand but bigger than clay. It is smooth and silk when wet and forms clumps when dry. It holds more water than sand.
|
|
|
Clay
|
Smallest particle size of soil. Sticky when wet and forms hard clumps when dry. It absorbs that most water-water moves through very slowly.
|
|
|
Bedrock
|
The R Horizon. This is below the last layer of soil. It is solid rock and has not yet been weathered or broken down.
|
|
|
Soil Horizon
|
A soil layer with physical and chemical properties that differ from those of soil layers above or below it.
|
|
|
Soil Profile
|
The soil horizons in a specific location; a cross section of soil layers that displays all soil horizons
|
