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9a 1 ) High levels of UV light from the sun provided the energy for the formation of organic chemicals early in the life of the planet. UV may also have been responsible for the formation and dominance of RNA - as indicated in the first link. . 2) The formation of ozone by UV light acting on free oxygen produced by early life forms protected the surface from ultra violet radiation and allowed more stable forms and the colonization of the land surface. . 3) Bombardment of the Earth by meteors or asteroids created catastrophic events that made many species extinct but also provided the opportunity for other species to flourish - mammals did after the KT extinction 68 million years ago. 9b. 1) Continental drift (better referred to as plate tectonics) isolated some continents and islands - eg Australia and Madagascar and allowed unique life forms to evolve. . 2) Plate tectonics also resulted in changing climates. This was partly the result of continents changing latitude and thus moving closer or further from the poles - and partly the result of changing ocean configurations changing the climate of the whole planet. Climate change opened up new opportunities for the evolution of species and made others extinct.
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What are three activities of geologist?
Three activities of geologists include conducting fieldwork to collect rock and soil samples, analyzing data to understand Earth's processes and history, and creating maps to depict geological features.
What are Three natural resources from the earth crust?
Three natural resources from the Earth's crust are coal, iron ore, and copper. These resources are commonly mined and utilized for various industrial processes, including energy production, manufacturing, and construction.
What three processes does water travel from the surface of the earth into the atmosphere and return to the earth again?
The three processes are evaporation, condensation, and precipitation. Evaporation occurs when water on the earth's surface turns into vapor and rises into the atmosphere. Condensation happens when the water vapor cools and turns back into liquid form, forming clouds. Precipitation occurs when the condensed water droplets in the clouds fall back to the earth as rain, snow, sleet, or hail.
What are the three states of a substance essential for life on Earth?
The three states of a substance essential for life on Earth are solid, liquid, and gas. These states determine how matter behaves and interacts with its environment, allowing for processes like nutrient absorption, transportation, and energy transfer within living organisms.
What are the three processes that act together to wear down and build up Earth's surface?
Weathering, erosion, and deposition are the three processes that act together to wear down and build up Earth's surface. Weathering breaks down rocks into smaller fragments, erosion transports these fragments to new locations, and deposition occurs when the transported material is laid down in a new location, building up Earth's surface.
What are three processes that have affected the history of life on earth?
Three processes that have affected the history of life on Earth include natural selection, mass extinction events, and evolutionary diversification. Natural selection drives the adaptation of species to their environment, mass extinction events change the course of evolution by wiping out many species at once, and evolutionary diversification leads to the emergence of new species over time.
What are three main branches of Natural History?
Three main branches of Natural History are botany (study of plants), zoology (study of animals), and geology (study of Earth's structures and processes).
What are three processes that begin in Earth's interior?
The Crust,The Mantle and The Core
How has the fact that Spain is surrounded on three sides of water affected its history?
Spain is not surrounded in three sides by water.
What are the three demographic processes responsible for population growth or decline?
Population is affected by birth rate, death rate and migration.
What are three activities of geologist?
Three activities of geologists include conducting fieldwork to collect rock and soil samples, analyzing data to understand Earth's processes and history, and creating maps to depict geological features.
what are three things affected?
what are three things affected by friction
What are the three main processes by which water break down the Earths landscape?
The three main processes by which water breaks down the Earth's landscape are erosion, weathering, and deposition. Erosion involves the movement of sediment by water, weathering is the breakdown of rocks into smaller particles, and deposition is the settling of eroded material in a new location. These processes work together to shape the Earth's surface over time.
What are Three natural resources from the earth crust?
Three natural resources from the Earth's crust are coal, iron ore, and copper. These resources are commonly mined and utilized for various industrial processes, including energy production, manufacturing, and construction.
How many geological eras are there in Earth's history?
There are three main geological eras in Earth's history: Paleozoic, Mesozoic, and Cenozoic. These eras are further divided into periods and epochs to more accurately represent the stages of Earth's history.
What three processes does water travel from the surface of the earth into the atmosphere and return to the earth again?
The three processes are evaporation, condensation, and precipitation. Evaporation occurs when water on the earth's surface turns into vapor and rises into the atmosphere. Condensation happens when the water vapor cools and turns back into liquid form, forming clouds. Precipitation occurs when the condensed water droplets in the clouds fall back to the earth as rain, snow, sleet, or hail.
How many different rock types are found on the Earth?
There are three main types of rocks found on Earth: igneous, sedimentary, and metamorphic. These categories are further subdivided based on their formation processes and mineral composition, resulting in a wide variety of rock types.
