Soil Flashcards--Chapter 3
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- 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