Extensive Reading-Book A Unit 75 (E)

absolute

perfect, complete
God’s law is absolute, for who can challenge God?

assemblage

persons or things assembled
The robot was an assemblage from many lego parts.

bristlecone

a pyramidal fir of southwestern California having spiny pointed leaves and cone scales with long spines
The bristlecone tree can be found in some parts of California.

chronology

the science of determining the dates or historical order of past events
Historians often debate over chronology of certain events that happened long ago.

combination

a coming together so as to form a group, sum, etc..
The meal comes with a combination of both chicken and beef.

costly

resulting in great expense
The great project was costly to many investors.

dating

to have or bear a date
dating specific times in history is important to many historians.

decay

decompose or deteriorate to dead matter
After a person dies, their body slowly decays.

establish

setup on a firm basis
We must establish a strong foundation before attempting anything else.

isotope

any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights.
These two elements are the same but this isotope has a greater mass than the other.

isotope

any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights.
These two elements are the same but this isotope has a greater mass than the other.

lifespan

The average or maximum length of time an organism, material, or object can be expected to survive or last.
The lifespan of a mayfly is only a couple of days.

occupy

become established in
I occupied the bathroom when I went to do my business.

pinpoint

to locate or describe exactly or precisely
We need pinpoint accuracy because we can’t afford any errors.

prehistoric

of or pertaining to the time or a period prior to recorded history
The dinosaurs lived in prehistoric times.

radioactive

spontaneously radiating energy in atoms or particles of atoms
Uranium is the most well known radioactive element.

radiocarbon

a radioactive isotope of carbon
With radiocarbon dating, we can get an accurate age of the subject.

relative

considered in relation to something else
You ideas are relatively in agreement with mine.

stratigraphic

The study of rock strata
The scientist looked at the stratigraphic findings and determined it was hardened lava.

waterlog

saturated as to sink in water
The waterlog sponge soaked up all the water.