Across
- 1. Small furry brown creature that lives underground
- 4. It is important that landowners keep their topsoil protected from erosion by growing __________ on it.
- 8. These worms live in the soil and help the soil to have enough air in it.
- 11. __________particles are very small, like the particles of cake flour and are usually flat.
- 12. The top layer of soil is called ________ and is usually fertile.
- 14. Dark-brown fertile substance in topsoil formed from rotten plant and animal material
- 15. Below topsoil is _____________.
Down
- 2. The name for molten rock that comes out of volcanoes
- 3. The surface of the Earth is made of hard rock and this layer is called the
- 5. Humus provides the ___________ that plants need to grow.
- 6. This insect lives in the soil and helps to decompose wood.
- 7. Below the subsoil is a layer of ____________.
- 9. __________particles are large, gritty particles like sugar grains.
- 10. Soil, water, sunlight and air support life on planet
- 13. Mountains and rocks are worn down when small particles carried by wind or water __________ them.
- 16. This type of soil has similar quantities of clay and sand particles and plenty of humus and is the best for growing things in.