28 Questions
What is the process of release of gases from the interior of the earth called?
Degassing
Which layer of the Earth is the heaviest elements like iron moved towards?
Inner core
What are the main components of the early atmosphere mentioned in the text?
Water vapour, carbon dioxide, nitrogen
What provided the atmosphere with water vapour and gases according to the text?
Volcanic eruptions
What was the earth's atmosphere mainly composed of during its early stage?
Carbon dioxide and methane
What process brought rain to the cooling earth according to the text?
Condensation
What process led to the oceans getting saturated with oxygen?
Photosynthesis
During which geological time period did life move from being limited to oceans to appearing on land?
Paleozoic
What primarily caused the lowering of temperature leading to more condensation and rain?
Dissolution of carbon dioxide in rainwater
During which period did extinctions of dinosaurs occur?
Cretaceous
What marked the transition from life being limited to oceans to spreading onto land?
Emergence and diversification of land-dwelling organisms
During which era did early human ancestors exist?
Cainozoic
What caused the heavier elements like iron to move towards the center of the Earth?
Increasing temperature
What was the early atmosphere of the Earth mainly composed of?
Carbon dioxide and ammonia
What process started the evolution of the present atmosphere by causing the release of gases from the interior of the Earth?
Degassing
Which layer of the Earth is formed by the materials getting separated according to their densities?
Crust
What led to the condensation of water vapour and brought rain to the cooling Earth?
Frequent volcanic eruptions
What was the Earth's atmosphere mostly lacking during its early stage?
Free oxygen
What marked the transition from life being limited to oceans to spreading onto land?
Appearance of flowering plants and trees
During which geological time period did life move from being limited to oceans to appearing on land?
Paleozoic
What process led to the oceans getting saturated with oxygen?
Photosynthesis
What primarily caused the lowering of temperature leading to more condensation and rain?
Dissolution of carbon dioxide in rainwater
During which era did early human ancestors exist?
Cainozoic
What are the main components of the early atmosphere mentioned in the text?
Carbon dioxide and water vapor
What is the process of release of gases from the interior of the earth called?
Outgassing
During which period did extinctions of dinosaurs occur?
Cretaceous
What provided the atmosphere with water vapor and gases according to the text?
Dissolution of carbon dioxide in rainwater
What was the earth's atmosphere mainly composed of during its early stage?
Carbon dioxide and water vapor
Study Notes
Formation of the Earth
- The process of release of gases from the interior of the Earth is called volcanic outgassing.
- The heavier elements like iron moved towards the center of the Earth through a process called differentiation.
Early Atmosphere
- The main components of the early atmosphere mentioned in the text are water vapor and gases.
- Volcanic outgassing provided the atmosphere with water vapor and gases.
- The early atmosphere was mainly composed of water vapor and gases.
Cooling of the Earth
- The cooling of the Earth led to condensation and rain through a process called precipitation.
- The lowering of temperature primarily caused the condensation of water vapor and brought rain to the cooling Earth.
Evolution of Life
- The transition from life being limited to oceans to spreading onto land marked the Silurian period.
- During the Silurian period, life moved from being limited to oceans to appearing on land.
- Oxygenation of the oceans led to the oceans getting saturated with oxygen.
Geological Time Periods
- Dinosaurs became extinct during the Cretaceous period.
- Early human ancestors existed during the Paleolithic era.
Formation of the Layers of the Earth
- The Earth's layers formed through differentiation, where materials separated according to their densities.
Test your knowledge about the evolutionary stages of the Earth from its formation to the development of the lithosphere and crust. Learn about the processes that led to the separation of materials based on their densities and the cooling and solidification of the Earth.
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