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Evaluate the age of rocks You find three undisturbed rock layers The middle layer is 120 million years old What can you say about the ages of the layers above and below it?
The layer above the 120 million-year-old layer must be younger, and the layer below must be older. So, the layer above the middle layer will be younger than 120 million years, and the layer below the middle layer will be older than 120 million years.
What layers of the earth the oldest?
The inner core of the Earth is the oldest layer, estimated to be about 4.5 billion years old. This layer is solid and composed mostly of iron and nickel.
What is the average age of oceanic crust?
The average age of oceanic crust is about 200 million years. This figure takes into account the continuous process of crust formation at mid-ocean ridges and its subsequent destruction at subduction zones.
What test do geologists use to discover the age of a fossil?
Geologists often use relative dating. When a fossil is found in a rock layer that has been dated, they know the age. If the fossil is found between two dated rock layers, they have an approximate age. If it's found above a dated layer, than it's younger, and vice versa. To date a layer of rock, radiometric dating is used. This measures the trace amount of a radioactive isotope, such as a uranium isotope or potassium isotope, which is then compared to its decay product, lead or argon, respectively, for these examples. More decay product and less of the original isotope means the layer is older, and vice versa. Index fossils can also be used. These are common fossils with a wide distribution that only existed for a short time. Then, when these are found in a rock layer, it is known that the rock layer formed when that organism existed.
How can you find the age of a layer of rock that is surrounded by layers of volcanic ash?
Use PEMDAS
How old is the supai layer?
The Supai layer is approximately 285 million years old. The Supai layer forms the surface of the Coconino and the Kaibab plateaus. It is composed major of limestone and sandstone.
Detail about parts of ozone?
Ozone is an isotope of oxygen. It is present as the ozone layer in the atmosphere.
Evaluate the age of rocks You find three undisturbed rock layers The middle layer is 120 million years old What can you say about the ages of the layers above and below it?
The layer above the 120 million-year-old layer must be younger, and the layer below must be older. So, the layer above the middle layer will be younger than 120 million years, and the layer below the middle layer will be older than 120 million years.
Which is the innermost layer of the sun?
The suns core is the innermost portion or the photosphere of the sun. It's the hottest layer and under the highest pressure, enabling nuclear fusion to take place, which produces the energy. The suns core temperature is estimated to be around 13.6 million degrees Kelvin.
Why is a layer of oil placed in the measuring cylinder when measuring the amount of water taken up by a plant?
The layer of oil placed in the measuring cylinder when measuring the amount of water taken up by a plant prevents water evaporation. This allows for a more accurate measurement of transpiration.
Who layer's 300 million eggs?
It lays around 300 million eggs.
Bubbling motions pass energy through which layer of the sun?
The photosphere is the uppermost layer of the sun. It passes energy through this layer with a bubbling motion, carrying hotter, less dense material to the upper surface as the cooled, denser material sinks deeper into the surface.
What makes scientists think that ozone layer disappearng?
There have been various experiments measuring the ozone layer. The ozone over the poles is seen to have depleted.
A type of trilobite is used as an index fossil. These fossils were made about 540 million years ago. A scientist finds a trilobite fossil in layer 5 in the diagram below?
Whats the answer everyone?
How hot is the crust of the sun?
The temperature of the Sun's core is estimated to be about ~15.7×106 Kelvin (16 million degrees Centigrade or 28 million degrees Fahrenheit)
What is a method used to determine the absolute age of a sample by measuring the relative amounts of parent isotope and daughter isotope?
Good question! In the late 1800s, a british archelologist found clay pots from a layer of rock and rubble in Tel-Helasy . He later compared them to other pots that his family owned and discovered a new form of dating layers of rock. He used this method on other relics from the ancient world; this method is still used today.
What layers of the earth the oldest?
The inner core of the Earth is the oldest layer, estimated to be about 4.5 billion years old. This layer is solid and composed mostly of iron and nickel.
