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sweet-ann [11.9K]
3 years ago
15

Match the vocabulary word with its meaning.

Geography
2 answers:
dangina [55]3 years ago
8 0

climatologist - a scientist who studies climate

intrusive - tending to force or thrust in without invitation, as an unwelcome person or thing

linguistics - the scientific study of language

genetics - the study of genes and their effect on hereditary variations

disoriented - confused, dazed, or lost

intermingle  - to mix things or people together

Lemur [1.5K]3 years ago
5 0
1.D
2.F
3.E
4.A
5.C
6.B
Hope this helps!!!!
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Each layer has a unique chemical composition, physical state, and can impact life on Earth's surface. ... Movement in the mantle caused by variations in heat from the core, cause the plates to shift, which can cause earthquakes and volcanic eruptions.

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Glaciers that form high up in the mountains are classified as _____.
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Southeast Asia is bordered by __________.
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Why is an astronaut able to float slightly on the moon
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Analysis of a rock sample that it contains 6.25% of its original uranium-235. How old is the rock? How do you know?
Andrews [41]

Answer:

The age of the rock = 2800.6 million years = 2.8 billion years.

A simple method of analysis similar to Carbon dating is used to obtain the required age of the rock. Radioactive substances decay according to first order reaction kinetics. So, plugging all the required parameters into the general equation for amount of substance left in a first order decay gives us the age of the rock.

Explanation:

Half life of Uranium-235 = 700 million years (from literature)

The decay of radioactive substances follow first order reaction kinetics.

The general equation is given as

A(t) = A₀ e⁻ᵏᵗ

A(t) = Amount of radioactive substance left after a particular time = 6.25%

A₀ = initial amount of radioactive substance = 100%

t = time that has passed since the beginning = age of the rock = ?

k = decay constant

The decay constant is related to the half life (T) through the relation,

k = (In 2)/T

k = (0.693/700) = 0.00099 /million years

A(t) = A₀ e⁻ᵏᵗ

6.25 = 100 e⁻ᵏᵗ

0.0625 = e⁻ᵏᵗ

In e⁻ᵏᵗ = In 0.0625 = -2.7726

-kt = - 2.7726

t = (2.7726/0.00099) = 2800.6 million years

t = 2.8 billion years.

Hope this Helps!!!

7 0
3 years ago
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