
Rock Layers Geologic Time
Presentation
•
Science
•
6th - 8th Grade
•
Hard
James Gonzalez
FREE Resource
6 Slides • 3 Questions
1
The Earth is 4.6 billion years
old, the rock layers in the Earth
and the fossils found there can give us
clues about the Earth's history. Observe
the image on the right, share what you
notice with your elbow partner.
La Tierra tiene 4600 millones de años viejo, las capas de roca en la Tierra y los fósiles encontrados allí pueden darnos pistas sobre la historia de la Tierra. Observa la imagen de la derecha, comparte lo que aviso con su compañero de codo.
2
Relative time is recorded in rocks.
Each of these rock layers, or strata, represents a period of time in Earth's history, so the entire sequence of layers is another timeline.
El tiempo relativo se registra en las rocas.
Cada una de estas capas o estratos de roca representa un período de tiempo en la historia de la Tierra, por lo que la secuencia completa de capas es otra línea de tiempo.
3
The drawing on the right makes the layers easier to see, can you figure out the relative ages of the layers? Puedes averiguar las edades relativas de las capas?
4
Law of Superposition
All over the world, rock layers are deposited on top of layers that were already there.
As more and more layers are deposited, the older rock layers end up at the bottom of the sequence and the newer ones toward the top. In geology, this is referred to as the Law of Superposition.
Ley de Superposición
En todo el mundo, las capas de rocas se depositan sobre capas que ya estaban allí.
A medida que se depositan más y más capas, las capas de rocas más antiguas terminan en la parte inferior de la secuencia y las más nuevas en la parte superior. En geología, esto se conoce como la Ley de Superposición.
5
Open Ended
According to the law of supersposition, which layer of strata is the newest/most recent, and which is the oldest?
Cual estrata es mas reciente? cual es mas antigua?
6
We can apply the Law of Superposition to the fossils as well as to the rocks. Which of the fossils is the earliest (oldest)?
Podemos aplicar la Ley de Superposición tanto a los fósiles como a las rocas. ¿Cuál de los fósiles es el más antiguo (el más antiguo)?
7
Multiple Choice
Which fossil is the oldest (mas antiguo)?
8
Multiple Choice
Which fossil is the newest/youngest (menos antiguo)?
9
Now let's create a model to imitate the law of superposition process.
The Earth is 4.6 billion years
old, the rock layers in the Earth
and the fossils found there can give us
clues about the Earth's history. Observe
the image on the right, share what you
notice with your elbow partner.
La Tierra tiene 4600 millones de años viejo, las capas de roca en la Tierra y los fósiles encontrados allí pueden darnos pistas sobre la historia de la Tierra. Observa la imagen de la derecha, comparte lo que aviso con su compañero de codo.
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