General Knowledge
What are the two types of changes to Earth's landscape?
Gradual and sudden
Define what a volcano is
An opening in Earth's crust that releases lava, ash, and steam when it becomes active and erupts
How do earthquakes change Earth's landscape?
They cause the ground to lift or split, can cause landslides
What geologic era are we currently living in?
Cenozoic era
What assists erosion?
Gravity, wind, water, ice
Define weathering
Weathering breaks down Earth's materials and rocks
How is the geologic time scale made?
Scientists study layers of rock to develop a timeline
Approximately how long ago was the last ice age?
10,000 years ago
What are fossils?
A fossil is any preserved remains, impression, or trace of something that lived in a past geological era
Define erosion
Erosion takes sediment to somewhere new
Which type of rock could have fossils in it?
Sedimentary
Which era is known as the "Age of mammals"
Cenozoic Era
What is petrification?
What is petrification?
Define deposition
Deposition is the dropping of sediment in a new location
What is the name of the most severe mass extinction in Earth's history?
Permian-Triassic Extinction Event
In what era did Pangea break apart?
Mesozoic era
How are islands formed by weathering, erosion, and deposition?
Land bridge can be broken down through weathering and erosion. - Sediment can be deposited in other locations, forming new landmasses
What is the geologic time scale?
The geological time scale is like a calendar to help understand the history of earth
Which extinction event led to the extinction of dinosaurs?
The Cretaceous-Paleogene Extinction Event