Minerals rich in soil

FOR CLASS 9 SCIENCE LESSON NATURAL RESOURCES
FOR VIDEOS https://www.youtube.com/channel/UCY-vBFPvKcc4PvMNOOgmzXg

1. MINERALS RICH IN SOIL A TOPIC FROM LESSON NATURAL RESOURCES BY DHANESWAR.S

2. MINERAL In mineralogy, a mineral is, a solid chemical compound with a fairy well-defined chemical composition and a specific crystal structure.

3. TYPES OF MINERALS Micro minerals or Trace minerals. Macro minerals.

4. SOIL Soil is a mixture.

5. IMPOTANCE OF MINERALS IN SOIL Soil minerals serve as both sources and sinks of essential plant nutrient.

6. FACTORS OR PROCESSES THAT MAKE SOIL

7. SUN AS A FACTOR THAT MAKE SOIL The sun heats up rocks during the day so they expand. At night, these rocks cool down and contract. This causes cracks in the rock and ultimately the huge rocks break-up into smaller pieces.

8. WATER AS A FACTOR THAT MAKE SOIL

9. WIND AS A FACTOR THAT MAKE SOIL Strong winds also erode rocks down and carry sand from one place to other like water.

10. MAJOR SOURCE OF MINERALS IN SOIL The mineral nutrients present in a particular soil depends on the parent rocks it was formed from. This means major source of minerals in soil is rocks.

11. TYPES OF SOIL

12. FACTORS DECIDE THE TYPE OF SOIL

13. FACTORS DECIDE WHICH PLANTS WILL THRIVE ON THAT SOIL

14. HUMUS The bits of decayed organisms present in the soil are called humus.

15. FUNCTION OF HUMUS IN SOIL

16. TOP SOIL The topmost layer of the soil which contains soil particles, humus and living organisms is called top soil.

17. SOIL POLLUTION Removal of useful components from the soil and addition of substances that affect fertility of the soil organisms is called soil pollution.

18. CAUSES OF SOIL EROSION

19. MEASURES FOR PREVENTION OF SOIL EROSION

20. IS REPLENISHMENT OF FORESTS NECESSARY

21. THANK YOU A PRESENTATION BY DHANESWAR.S PRATHAM KADEL.S PRINCE.S