Hadean Eon Flashcards

1
Q
A
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2
Q

Archaean

A

Anaerobic bacterial life, oxygen starts to accumulate

(3000-2500 Ma)

Relating to the highly metamorphosed rocks formed in the early Precambrian era

Belonging to the earlier of the divisions of Precambrian time (approx. 3.8-2.5 billion years ago)

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3
Q

Adhesion

A

Frictional grip

The action or process of adhering to a surface or object

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4
Q

Eon

A

An indefinite and very long period of time

Unit of time equal to a billion years or more

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5
Q

Biomonomers

A

A small organic molecule that can chemically bond to other monomers to form a biopolymer

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6
Q

Biopolymers

A

A polymeric substances occuring in living organisms made up of biomonomers

ie. protein, cellulose, DNA

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7
Q

Carbon

A

Element that has two main forms (diamond and graphite), impure form is charcoal

Forms organic compounds

In many inorganic compounds as well

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8
Q

Central Dogma

A

Main thesis of molecular inheritance

DNA -> RNA -> protein

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9
Q

Chemical Evolution

A

The changes and transformation of chemical elements, compounds and molecules

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10
Q

Cohesion

A

Intermolecular attraction that forms a united whole

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11
Q

Crystal Lattice of Water

A

Geometric arrangment of points in space at which atoms, molecules or ions of a crystal occur

Three dimensional

When water freezes it forms a clathrate structure

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12
Q

Emergence

A

The process of coming into being, becoming exposed or important or prominent

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13
Q

Evaporation

A

The process of being vapour, liquid to gas

(Vaporization)

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14
Q

Geological TIme Scale

A

Chronologic measurement relating stratigraphy (branch of geology concerned with order and position of historical layers of rock) to time

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15
Q

Green House Gases

A

Gases in the atmosphere that absorb and emit radiation within the thermal infrared range

ie. Carbon dioxide, Methane, Nitrous oxide, Sulfur hexafluoirde, Chlorinated fluorocarbons (CFCs)

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16
Q

Hadean Eon

A

Earliest eon in the history of the Earth from the first accretion of planetary materials

(4600 - 3800 Ma)

Building phase, formation of the solar system, ends with the origin of life

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17
Q

Hydrogen Bond

A

A chemical bond with a hydrogen atom that is attracted to an electronegative atom

ie. nitrogen, oxygen, fluorine

18
Q

Hydrophilic

A

Has a tendency to mix with, dissolve in or be wetted by water

“Water loving”

19
Q

Hydrophobic

A

Repels or fails to mix with water

“Phobia” - does not like water

20
Q

Hydrothermal Vents

A

An opening in the seafloor out of which heated and mineral rich water flows

21
Q

Interstellar Organic Compounds

A
22
Q

Interstellar Space Dust

A

Comes from dying stars as they slowly burn out or use up their fuel

Large clouds of this dust will collect in space

23
Q

Micelles

A

An aggregation of molecules in a colloidal solution

Colloidal solution: homogeneous, noncrystalline susbtace consisting of large molecules of finely divided particles of one substance dispersed through a second substance, gelatinous consistency

ie. gels, sols, emulsions

24
Q

Miller Experiment

A

Simulated hypothetical conditions thought at the time to be present on early Earth. It tested for occurence of chemical evolution

25
Q

Nonpolar Compound

A
26
Q

Panspermia

A
27
Q

Phanerozoic Eon

A
28
Q

Polar Compound

A
29
Q

Prebiotic Soup

A
30
Q

Proteins First Hypothesis

A
31
Q

Proterozoic Eon

A
32
Q

Protocells

A
33
Q

Reducing Atmosphere

A
34
Q

RNA World

A
35
Q

Specific Heat

A
36
Q

Spontaneous Origins

A
37
Q

Surface Tension

A
38
Q

Surfactant

A
39
Q

Vesicles

A
40
Q

Volcanic Outgassing

A