1. (1) melting and solidification (2) weathering and biologic activity
The diagram shows soil. Which two processes produced the layer of dark brown to black soil?
(1) melting and solidification
(2) weathering and biologic activity
(3) erosion and uplifting
(4) compaction and cementation

2. Weathering
Erosion

3. WEATHERING is the breakdown of Earth’s surface (physical & chemical).

4. The two things usually occur together!
WEATHERING is the breakdown of Earth’s surface (physical & chemical).
EROSION is the transportation of weathered sediments.
The two things usually occur together!

6. There are four AGENTS OF EROSION
Wind
Water
Glaciers
Mass Wasting (Gravity)

7. Agents of erosion leave clues on the sediments…
Water- smooth
and round

8. Agents of erosion leave clues on the sediments…
Water- smooth
and round
Wind- flat edge
with holes

9. Agents of erosion leave clues on the sediments…
Water- smooth
and round
Wind- flat edge
with holes
Glaciers- “scraped” with
visible lines

10. Agents of erosion leave clues on the sediments…
Water- smooth
and round
Wind- flat edge
with holes
Glaciers- “scraped” with
visible lines
Mass Wasting- all shapes
and sizes
(Gravity)

11. The sedimentary rocks conglomerate and breccia are shown below
ABRASION!
They are the same in most respects, except for the fact that one was formed in water and the other was not. Which formed in water and how can you tell?
(1) Breccia, because it has angular fragments
(2) Conglomerate, because it has angular fragments
(3) Breccia, because it has rounded fragments
(4) Conglomerate, because it has rounded fragments

12. Glacier!

13. Wind!

14. Gravity!
(Mass Wasting)

15. Water!

16. Wind
on Mars!