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;
9 Cards in this Set
- Front
- Back
|
Soil is a mixture of what four materials? |
Weathered rock, organic matter, water and air. |
|
|
What is humus? What color does it make soil? |
Decayed Organic matter soil and it makes soil black |
|
|
What is a soil horizon? Describe the A horizon Describe the B horizon Describe the C horizon |
A layer of soil Upper layer Lies below Horizon a Deepest layer of soil |
|
|
Why does tropical, arctic, desert, and temperate regions have different types of soil? |
Not Suitable for growing a lot of crops |
|
|
Why is tropical soil unsuitable for growing most crops? |
Not a lot, the rain washes out the minerals |
|
|
Describe sediments |
Matter that settles at the bottom of a liquid |
|
|
How are sedimentary rocks formed? |
From loose material from other sedimentary rock. |
|
|
What 2 things does the formation of sedimentary rocks depend on? |
Water and Worms |
|
|
Where are the oldest layers found in sedimentary rocks? |
Fossils |
