1. 2. _____the oldest rock layer located (Earth’s story)
1. _____ layer of soil is made of clay and minerals and contains less humus (soil profile)
2. _____the oldest rock layer located (Earth’s story)
3. _____ process moves sediment (erosion)
4. _____ the number of years a fossil or rock layer has existed (absolute age)
5. _____ type of rock are fossils formed In (fossils)

2. 2. Where is the youngest rock layer located? (Earth’s Story)
1. What layer of the soil is unweathered bedrock? (soil profile)
2. Where is the youngest rock layer located? (Earth’s Story)
3. What process drops off sediment and builds up land? (erosion and deposition)
4. What type of mechanical weathering occurs when rock layers peel away? (weathering )
5. What substance is hardened tree sap? (fossils)

3. 2. Where is the oldest rock layer located?
1. What layer of soil is made of clay and minerals and contains less humus?
2. Where is the oldest rock layer located?
3. What process moves sediment?
4. What is the number of years a fossil or rock layer has existed?
5. What type of rock are fossils formed in ?

4. 1. What is a trace fossil?
2. What is a coprolite?
3. What is a gastrolith?
4. What is a mold?
5. What is a cast?
6. What is an body fossil?
7. What is index fossil?

5. Trace fossil-animal’s activity ex. Tracks or footprints
1. What is a trace fossil?
Trace fossil-animal’s activity ex. Tracks or footprints

6. 2. What is a coprolite?
Coprolites-dung or stomach contents of ancient animals

7. 3. What is a gastrolith?
Gastroliths-polished stones used to grind food

8. Mold-a cavity in the ground or rock where a plant or animal was buried
4. What is a mold?
Mold-a cavity in the ground or rock where a plant or animal was buried

9. 5. What is a cast?
5. Cast-an object created when sediment fills in a mold and becomes rock
Observe how fossils can form.

10. 6. What is a body fossil?
Body fossil-whole organisms or part

11. 7. What is an index fossil?
Index fossil- fossils of organism that lived for a short, specific time period
Ex trilobites