The early Universe basically only consisted of hydrogen, and small amounts of helium. Heavier elements were created in the center of stars - these materials got into space, mainly through supernova explosions, and became part of newer solar systems.
Because they are billions and billions and billions of miles away from us.
Cyanobacteria are believed to be responsible for establishing Earth's oxygen-rich atmosphere. Nearly 2.3 billion years ago, these microbes, which lived in the seas, were the first organisms to produce oxygen, leading to the transformation of the Earth's environment.
Earth's atmosphere is primarily caused by the planet's gravitational pull, which retains gases that are released from volcanic activity, biological processes, and impacts from celestial bodies. The composition of the atmosphere, mainly nitrogen and oxygen, has evolved over billions of years through processes like photosynthesis and chemical reactions. Additionally, the Earth's rotation and thermal dynamics help distribute these gases, creating layers and weather patterns that define our climate.
galaxies
Billions of stars make up galaxies. Galaxies are vast systems of stars, planets, gas, and dust that are held together by gravity. Our Milky Way galaxy, for example, consists of billions of stars including our Sun.
The Earth is part of the solar system, which includes the sun and other planets. It also belongs to the Milky Way galaxy, one of billions of galaxies in the universe. The Earth is part of the geosphere, biosphere, and hydrosphere that make up its interconnected natural systems.
Not necessarily. The presence of oxygen in Earth's atmosphere is the result of biological processes that have occurred over billions of years, not simply a function of the biosphere's age. Other factors such as the balance of oxygen-producing and oxygen-consuming organisms also play a role in determining atmospheric oxygen levels.
yes b/c hydrosphere is all the water in the world and there is a lot of marine/ocean life ranging from the blue whale to plankton (not spongebob -_-) so yeah there is life in the hydrosphere. go h2o!
The primary factor that was missing for billions of years that was necessary for protists to evolve was oxygen in the atmosphere. Billions of years ago, the atmosphere was mostly made up of carbon dioxide, carbon monoxide, hydrogen, nitrogen, and water vapor.
The primary factor that was missing for billions of years that was necessary for protists to evolve was oxygen in the atmosphere. Billions of years ago, the atmosphere was mostly made up of carbon dioxide, carbon monoxide, hydrogen, nitrogen, and water vapor.
The Earth has changed significantly over billions of years due to geological processes such as plate tectonics, climate fluctuations, and the evolution of life forms. These changes have shaped the planet's surface, atmosphere, and ecosystems, leading to the diverse environments we see today.
The original biosphere refers to the Earth's natural and balanced ecosystem before significant human alteration. It includes all living organisms and their interactions, as well as the physical environment that supports life. This system has evolved over billions of years into a complex and interconnected web of life.
The primary factor missing for billions of years was the presence of oxygen in the Earth's atmosphere. The evolution of protists and other complex life forms was made possible by the emergence of photosynthetic organisms like cyanobacteria, which produced oxygen as a byproduct of photosynthesis. This oxygenation of the atmosphere allowed for the development of aerobic respiration in organisms, enabling more complex metabolic processes to evolve.
...lowered the level of CO2 in the atmosphere and released O2
The atmosphere relieved itself of moisture in the form of rain.
The primary source of Earth's atmosphere is outgassing from volcanic activity and the release of gases from Earth's interior. This process began billions of years ago and continues to contribute to the composition of our atmosphere.
Billions and Billions and Billions Billions and Billions and Billions Billions and Billions and Billions Billions and Billions and Billions Billions and Billions and Billions Yeah incase u don't get it HEAPS