8.2 Test Review

What is a fossil? Check all that are true.

• sedimentary rock that has formed in old areas

• organisms that have recently died

• preserved body parts of ancient organisms

• preserved traces left by ancient organisms such as burrows, tracks, nests or footprints

• a plant or animal that has been buried by sediments

What is the environment MOST likely to form and preserve fossils?

• floodplain

• glacier

• ocean

​ Glaciers create areas that have ​ (a)   erosion and ​ (b)   deposition. ​Floodplains have ​ (c)   erosion and​ (d)   deposition. Therefore, ​ (e)   are going to create areas that have low numbers of fossils or gaps in the fossil record.

• high
• low
• glaciers
• floodplains
• zero
• mountains

Match the following

• wearing away of rock or sediment

• strata

• laying down of sediment carried away

• zircon

• layers of sediment

• erosion

• layers becoming compacted together

• cementation

• a small mineral crystal used in absolute

• deposition

Classify the following:

Groups:

(a) True fossils

,

(b) Not true fossils

• imprint of leaf in stone

• moose neck bone

• brachiopods

• beaver jaw

• T-rex tooth

• rotted stick on ground

• coral

• dead squirrel

Circle which fossil group is the oldest

Most fossils form when organisms that die become buried in sediments

• True
• False

Michigan was once covered by ​ (a)   . We know this because many of the fossils are​ (b)   creatures which could not live in ​ (c)   environments.

• oceans
• marine
• freshwater
• glacier
• shell
• cold

What is a trilobite?

• 
• 
• 
• 

What is the approximate age of the trilobite fossils in this strata?

• 495 mya

• 560 mya

• 510 mya

• 540 mya