Answer:
Amazon rainforest is a diverse and rich forest found in the Southern part of America-precisely Brazil, Peru, Columbia. And, also, some minor part are found within Venezuela, Ecuador, Bolivia, Guyana, Suriname and French Guiana.
<em>It is also known as the Amazon jungle. Being a bio-diverse ecosystem means that, it is with an estimated 390 billion individual trees divided into 16,000 species which could be found inside it. </em>
<em>Most of the species of trees in any part of the world can be found inside the forest. Also, some rare and unknown species could also be found inside it.</em>
Explanation:
Answer:
b. The death toll from volcanic eruptions do not always correlate to exclusivity, and can be affected by human actions before and after the eruption.
Explanation:
Many volcanic eruptions don't kill anyone. This is because most active volcanoes are well-known to local residents, who give them appropriate respect.
Lahars are deadly, but so are pyroclastic flows, and releases of ash and/or poison gases. The two deadliest eruptions in recorded history caused death by starvation and tsunami.
The point of the paragraph was that the VEI was <em>not</em> directly related to the number of deaths.
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!!!
Answer:
A
Explanation:
It is an event that takes place in the Pacific Ocean, near the Equator, when the water of the Pacific Ocean in its eastern part starts to warm up, and the result of that are also warm air masses.
