BIOLOGY HIGH SCHOOL

An intrusion crosses and extrusion. Which layer is the oldest? Explain.

Answers

Answer 1
Answer:

An intrusion crosses and extrusion. The extrusion is the oldest layer and an intrusion is always younger. The decay of Potassium-40 isotope known as potassium-argon (K-Ar) method allows dating of materials that up to 1,000 billion years old.

What is Absolute dating process?

Absolute dating is the process of determining an age on a chronological or specified time scale in which events occurred in archaeology and geology.The most common method of absolute dating uses by geologists is radiometric dating methods which is based on the natural radioactive decay of certain elements such as potassium and carbon found in the rocks.

The carbon-14 isotope is used in radiocarbon dating, but is only useful for measuring recently formed rocks in the geologic past. By comparing the ratio of parent isotope with a known half-life to daughter product in the rock, the age of the rock can be determined.

Therefore, An intrusion crosses and extrusion. The extrusion is the oldest layer and an intrusion is always younger. The decay of Potassium-40 isotope known as potassium-argon (K-Ar) method allows dating of materials that up to 1,000 billion years old.

Learn more about extrusion on:

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#SPJ5
Answer 2
Answer:

Answer:

an intrusion is always younger! <3

Explanation:

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Answers

The statement that is true is C.

Answer:

Magnetism is caused by the spinning motion of electrons. is true :)

Explanation:

Which of these germinal layers give rise to the digestive system, the circulatory system, and the nervous system?

Answers

The three germinal layers are:

Endoderm, mesoderm, ectoderm

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Which of the following is an extinct group of mollusks related to today's chambered nautilus?a. trilobites
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Answers

B. ammonites. is an extinct group of mollusks

Answer:

The answer is B. Ammonites Hope this helps!

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Answers

The answer is letter C. macroevolution. Macroevolution refers to an evolution of the largest scale, specifically creation of new species and extinction while Microevolution refers to a change in gene frequency within a population; molecular basis for evolution. The process of speciation may fall within the purview of either, depending on the forces thought to drive it. 

Answer:

macroevolution

Explanation:

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Answers

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Answers

Answer:

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