The Principle
___ is the principle that sediments are deposited in large continuous sheets
Lateral continuity
What is the basis for understanding Earth's past ?
Its the ideas about Earth's age and Earth's and geologic history. Also scientist explore Earth and Earth process in scientific ways.
From the investigation: "The present is the key to the past". How long do you think it would take to create a canyon as deep as a Grand Canyon?
Millions of years , longer than humanity.
___ is the principle that in undisturbed rock layers, the oldest rocks are on the bottom.
Superposition
What is relative age dating ?
A method to determine the age of rocks in the rock layers. How old and young a rock is. It can be cause by geologic event.
From The investigation : "Relatively Thinking" Do you think all of the rock layers in the picture formed at the same time ? Why or why not ?
No , Why because sedimentary rock forms very slowly over time
The principle of ____ states that geologic process occur today are similar to those that have occurred in the past.
Uniformitarianism
What can fossils record can tell us about earth's history ?
It can tell us what types of organisms and climates occurred on Earth
What can you conclude about the layers that contain only the mammals ? Are they younger or older than the layers containing the dinosaurs?
The principle of ____ if one geologic feature cuts across another feature, the feature that it cuts across is older.
Cross Cutting Relationships
What are some geologic processes happening today that you think most likely happened in the past, too?
weathering, erosion, rock melting, molten rock cooling.
From the lab : Layer Rock, how do you think the model resembles a rock formation?
The rock resembles a rock formation of sedimentary rock because of its layers. Its layers are broken and/or faulted.
The principle of ___ if one rock contains pieces of another rock, the rock containing the pieces is younger than the pieces.
Inclusions
What might cause an organism to appear or disappear in the fossil record?
Climate or Environmental change
What are foraminifera ?
Tiny, single-celled organisms