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What process occurs when bits of rocks are carried away by flowing water?
weathering
What process in the hydrologic cycle puts soil moisture into the atmosphere?
Transpiration
Ground water when taken up by the roots of plants eventually reenters the atmosphere by the process of?
Transpiration
Why is there is so little carbon dioxide and more oxygen in Earth's atmosphere?
Algae and later plants carried out photosynthesis, which uses sunlight to convert water and carbon dioxide into sugar and oxygen. This process removed carbon dioxide from the air and added oxygen. Additional carbon dioxide was removed and locked away in carbonate rocks such as limestone.
What term describes the specific process of water leaving the surfaces of plants and entering the atmosphere?
transpiration
What did cyanobacteria add to the atmosphere?
Cyanobacteria added oxygen to the atmosphere through the process of photosynthesis, fundamentally changing the composition of Earth's atmosphere and enabling the evolution of aerobic organisms.
How did oxygen accumulate in the atmosphere?
Oxygen accumulated in Earth's atmosphere through the process of photosynthesis carried out by early cyanobacteria. These organisms released oxygen as a byproduct, gradually building up oxygen levels in the atmosphere over millions of years.
What gives us most of our oxygen in the atmosphere?
Most of the oxygen in Earth's atmosphere comes from photosynthesis carried out by plants, algae, and cyanobacteria. These organisms utilize sunlight to convert carbon dioxide into oxygen during this process.
Where did the oxygen in Earth's atmosphere come from originally?
The oxygen in Earth's atmosphere originally comes from the process of photosynthesis carried out by early photosynthetic organisms like cyanobacteria, which released oxygen as a byproduct. Over time, the accumulation of oxygen led to the development of an oxygen-rich atmosphere.
Where did oxygen originally come from?
Oxygen on Earth originally came from the process of photosynthesis carried out by early single-celled organisms like cyanobacteria. These organisms used sunlight to convert carbon dioxide and water into glucose, releasing oxygen as a byproduct. Over millions of years, this process accumulated oxygen in the atmosphere, leading to the oxygen-rich environment we have today.
What process was primarily responsible for the development of the present percentage of free oxygen in the Earth's atmosphere?
The process primarily responsible for the development of the present percentage of free oxygen in the Earth's atmosphere is photosynthesis. This process is carried out by plants, algae, and cyanobacteria, which convert carbon dioxide and water into oxygen and glucose with the help of sunlight. Over time, this has led to the accumulation of oxygen in the atmosphere to its present level of around 21%.
Soil bacteria are responsible for carrying many steps in the nitrogen cycle. Soil bacteria are NOT responsible for?
Soil bacteria are not responsible for fixing nitrogen from the atmosphere. This process is carried out by nitrogen-fixing bacteria like Rhizobium and cyanobacteria.
How was earths early atmosphere first changed?
Earth's early atmosphere was first changed through volcanic activity, which released gases such as water vapor, carbon dioxide, and nitrogen. This led to the formation of oceans and the gradual accumulation of oxygen through photosynthesis by early organisms like cyanobacteria. This oxygenation process transformed the atmosphere to one more similar to the one we have today.
How did earth get an oxygen filled atmosphere billions of years ago?
Billions of years ago, Earth's early atmosphere likely contained little to no oxygen. Oxygen began to accumulate in the atmosphere around 2.5 billion years ago due to the process of photosynthesis by early cyanobacteria and other organisms, which produced oxygen as a byproduct. This led to the gradual build-up of oxygen levels in the atmosphere over millions of years.
How are nitrates changed back into nitrogen?
Nitrates can be changed back into nitrogen through a process called denitrification. This process is carried out by denitrifying bacteria in the soil, which convert nitrates into nitrogen gas under anaerobic conditions. This nitrogen gas is then released back into the atmosphere.
How did cyanobacteria affect evolution process?
Cyanobacteria photosynthesised, which meant that they released oxygen. This was the key to the evolution of eukaryote cells that aerobically respired. From their evolution, the O2 levels in the atmosphere was able to increase; this is why we eventually evolved.
Does cyanobacteria increase the levels of carbon dioxide in the atmosphere?
Yes, cyanobacteria can increase the levels of carbon dioxide in the atmosphere through the process of respiration. However, cyanobacteria also play a significant role in reducing atmospheric carbon dioxide levels through photosynthesis, where they convert carbon dioxide into organic compounds. Overall, the impact of cyanobacteria on atmospheric carbon dioxide levels depends on the balance between these two processes.
