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;
15 Cards in this Set
- Front
- Back
|
The process that breaks up rocks
|
Weathering
|
|
|
What are lichens?
|
Tiny, plantlike living things that grow on the outsides of rocks
|
|
|
What three weather factors break rocks apart?
|
Temperature changes, wind and water
|
|
|
Topsoil contains ___________ and _________________
|
humus, bits of rock
|
|
|
Where does most rock weathering happen?
|
Subsoil
|
|
|
What dissolves nutrients in soil?
|
Water
|
|
|
______________ is a product that makes soil richer
|
Fertilizer
|
|
|
Soil rich in nutrients and provides the right conditions for plants to grow is___________
|
Fertile
|
|
|
___________ and ___________ are properties of soil
|
Color; texture
|
|
|
Which soil type best absorbs water?
|
Soil with a lot of humus (potting soil)
|
|
|
How many soil types have scientists identified?
|
over 70,000
|
|
|
What is contained in subsoil?
|
Small rocks
|
|
|
What are the three main layers of soil?
|
Topsoil, subsoil and bedrock
|
|
|
_____________ is the process that breaks up rock
|
Weathering
|
|
|
What are three farming methods to save soil?
|
contour plowing, strip cropping and terracing
|
