Show:
Soil Composition
Soil Formation
Soil Characteristics
Soil Layers
Miscellaneous
100
A soil's composition refers to its __________
Ingredients
100
All soil was formed from ___________.
weathered rock
100
Loose, friable and firm are words used to describe a soil's ___________.
Consistence
100
Another name for soil layers is __________ __________.
Soil Horizons
100
Name the 2 types of scientific observations.
Qualitative and Quantitative
200
What is the definition of organic matter?
Material from living things
200
What is the process called that begins the formation of soil?
weathering
200
What are 3 soil characteristics we observed in our lab called, "Observing Soil Scientifically"?
Color, consistence, texture.
200
Most plants grow in which layer of soil? Provide the letter name too.
Topsoil - A Layer
200
What is the name of the science tool that measures the volume of a liquid? And what unit of measurement does it use?
Graduated cylinder - milliliters
300
How can a dead plant help another plant live?
Dead plants decompose and turn into nutrients for living plants to use for photosynthesis.
300
Give 3 examples of weathering.
Rain, wind, waves, freezing, thawing.
300
Describe how to test a soil's texture. Give an example of 1 soil texture.
Wet finger and rub soil between your fingers. Examples-grainy, silky, sticky.
300
The topsoil layer can be divided into 2 parts. What is the bottom layer of topsoil called?
The Eluviation or E Layer (which is light in color)
300
Which tool measures metric length? Give an example of what unit you might use to express your answer.
Meter stick, or metric ruler - mm, cm, dm, m
400
Which is the correct particle size (smallest to largest) for the 3 rocks that make up soil?
Clay, Silt, Sand
400
A student examines a 2mm piece of rock in soil. What is this particle called?
Sand
400
Discuss the 3 soil consistencies.
Loose-breaks when held. Friable-breaks with a small amount of pressure with 1 finger. Firm-lots of pressure with 2 fingers.
400
Name the 5 basic soil layers in order from top to bottom.
1) Organic matter. 2) Topsoil. 3) Subsoil. 4) Parent material. 5) Bedrock.
400
Explain the difference between a scientific observation and an inference.
Scientific observation-can be proven (it's based on your senses or measurements). Inferences-are "I think" statements or opinions.
500
What are the 3 nutrients in soil and discuss how they are made.
Nutrients in soil are made when organic matter decomposes into chemical known as P, K, N. (Potassium, Nitrogen, and Phosphorous)
500
Soil forms in layers. name 4 facts about the Eluviation layer.
1) Lower part of topsoil. 2) leaching layer. 3) "E" layer. 4) Light brown in color. 5) More rock.
500
Describe the texture of the 3 types of rock that make up soil.
Sand-grainy (gritty). Silt-silky (powdery). Clay-sticky (gummy).
500
Name the 6 components of Topsoil.
Sand, silt, clay, organic matter, air, water.
500
A scientific observation... a. is a complete and accurate description b. is based on a person's opinion c. always includes a measurement d. always includes an inference
a. is a complete and accurate description