1. 3rd Grade Rocks & Minerals
Mrs. Thornburg’s Vocabulary Pictures

2. Vocabulary Words in this Unit
Mineral Weathering
Rock Igneous Rock
Erosion Sedimentary Rock
Silt Metamorphic Rock
Sand Humus
Clay Loam

3. What do we call the part of the soil made up of broken-down pieces of dead plants and animals?

4. Humus

5. What do we call soil that is a mixture of humus, sand, silt, and clay?

6. Loam

7. What do we call a type of soil with very, very tiny grains of rock?

8. Clay

9. What do we call rock that was once melted and then cooled and hardened?

10. Igneous Rock

11. What do we call a rock made when materials settle into layers and get squeezed until they harden into rock?

12. Sedimentary Rock

13. What do we call a rock that has been changed by heat or pressure?

14. Metamorphic Rock

15. What do we call the breaking down of rock into smaller pieces?

16. Weathering

17. What is a solid object found in nature that has never been alive?

18. Mineral

19. What is a naturally formed solid made of grains of one or more minerals?

20. Rock

21. What do we call the movement of weathered rock and soil?

22. Erosion

23. What do we call soil with grains of rock that you can see with your eyes only?

24. Sand

25. What do we call soil with grains of rock that are too small to see with your eyes alone?

26. Silt