Rocks, Fossils etc.

To be considered a ________________ fossil an organism must have lived only during a short part of Earth's history; many fossils of the organism must be found in a rock layer; the fossil must be found over a wide area of Earth; the organism must be unique.

• carbon film
• index
• trace

___________ forms when sediments bury an organism and the sediments change into rock; the organism decays leaving a cavity in the shape of the organism.

• Index Fossil
• Trace Fossil
• Mold & Cast
• Preserved Fossil

The mass extinction that ended the era caused the dinosaurs to become extinct. What is the name of this era?

• Precambrian Era
• Cenozoic Era
• Mesozoic Era
• Paleozoic Era

Carbon-14 is involved in which type of dating?

• Absolute
• Relative 
• Igneous
• Metamorphic

Humans are part of the most recent period of this era. What is the era?

• Precambrian Era
• Cenozoic Era
• Mesozoic Era
• Paleozoic Era

The relative age of rocks and fossils can be determined using two basic methods _______  and __________. 

• ordering rock layers, index fossils
• carbon 14 dating, ice cores
• igneous fossils, metamorphic fossils

_________ states that each rock layer is older than the one above it. 

• Law of Gravity
• Law of Superposition
• Absolute Dating
• Law of Energy

__________ play an important role in helping scientists to gain an understanding of the Earth's history, particularly how earth's climate has changed over time.

• Amber
• Dating
• Ice cores
• Humans

Scientists can gain an understanding of Earth's climate, biological, and geologic history by examining the contents of different layers of _____________.

• Sedimentary Rock
• Igneous Rock
• Metamorphic Rock

Sudden movement of tectonic plates are called _________. 

• Continental drift
• subduction
• Plate Tectonics Theory
• Earthquakes