Formation of Life on Earth
This hypothesis suggests that the complex organic molecules necessary for life could have formed on the surface of clay minerals.
Clay Hypothesis
Our Paleolithic Era ancestors were the first to employ ________, heralding a technological revolution that enabled them to interact more effectively with their environment.
Stone tools
The practice of agriculture involves _______ and _________.
The domestication of animals and the cultivation of crops.
Describe early conditions on Earth approximately 4.5 billion years ago.
The exchange of goods, resources and ideas.
Trade
This theory supposes that life may have begun somewhere else in the cosmos and then arrived on our planet.
Extraterrestrial Sources or Panspermia
The primary means of subsistence for Paleolithic societies was ________ and _________.
Hunting and Gathering
The development of _______ practices enables population growth, permenant settlements and food surpluses that supported specialization beyond agriculture.
Agricultural
Through the process of _______, oxygen was released into the atmosphere gradually tranforming it to an oxygen rich environment humans require for survival.
Photosynthesis
The movement of people from one region to another, whether voluntary or forced.
Migration
This theory suggests that life began as simple organic molecules formed through chemical reactions.
Primordial Soup and Chemical Evolution
A pivotal development during this period was the mastery of _____ which granted our ancestors protection, warmth, and a valuable cooking source.
During the neolithic era humans discovered ________, the art of mining and the manipulation of metals, such as copper, bronze, and iron.
Metallurgy
This period known as ___________, saw the planet almost entirely covered in ice. The coverage of ice reflected the sunlight droping global temperatures
"Snowball Earth"
Missionaries and religious leaders traveled to distant regions to proselytize and convert local populations to new faiths.
Religious Conversion
This proposes that life may have originated from openings on the seafloor which release superheated water rich in minerals and other chemical compounds.
The utilization of diverse materials, the creation of intricate tools, paintings, and sculptures demonstrate the ______ development of our Paleolithic ancestors.
Cognitive
The neolithic era was characterized not only by agriculture but by the emergence of _______ socieites. Neolithic innovations led to the development of specialized roles and social hierarchies.
Complex
All the continents were once assembled into a super continent called _______. This impacted ocean circulation and contributed to extreme climate conditions.
Pangea
Conquest
This theory posits that RNA played a central role in the origin of life on Earth. RNA similar to DNA can store genetic information. It can also act as a catalyst, facilitating chemical reactions.
RNA World Hypothesis
The _______ mountains in Spain have yielded remarkable discoveries and contain a wealth of fossils and stone tools.
Atapuerca
Cities
The impact of a ______ led to the mass extinction the dinosaurs 65 million years ago.
Asteroid
A form of expansion in which one society establishes settlements in distant lands.
Colonization