When was there enough oxygen to populate the earth?
it took billions of years for oxygen to saturate the atmosphere. it has been building up slowly since about 3.5 billion years ago.
around 2.5 billion years ago levels were enough for life to slowly start moving out of the seas (there needed to be enough ozone to weaken the suns strong UV radiation)
Life until about 530 million years ago was nothing more complex than bacteria
How have humans added excess amounts of this gas to the atmosphere?
Humans have added excess amounts of carbon dioxide to the atmosphere primarily through the burning of fossil fuels such as coal, oil, and gas for energy production, transportation, and industrial processes. Deforestation and changes in land use have also contributed to increased carbon dioxide levels by reducing the Earth's natural capacity to absorb and store carbon.
What is the autoignition temperature and flash point of air?
Air meaning standard mixture of atmospheric gases (N2 78.084 %,O2 20.9476 %,Ar 0.934 %,CO2 0.0314 %,Ne 0.001818 %,He 0.000524 %,CH 40.0002 %,Kr 0.000114 %,H2 0.00005 %,Xe 0.0000087 %)
When was the NOAA established?
The National Oceanic and Atmospheric Administration (NOAA) was established on October 3, 1970. It is an agency within the United States Department of Commerce that focuses on the conditions of the oceans and the atmosphere.
Where does the word Stratosphere come fromozone layer?
The word "stratosphere" is derived from the Greek words "stratos," meaning "spread out" or "layer," and "sphaira," meaning "ball" or "globe." It refers to the layer of Earth's atmosphere above the troposphere and below the mesosphere. The ozone layer is found within the stratosphere.
How is ozone created in the upper atmosphere?
Well, ozone (the ozone layer) is created in the Stratosphere. Ozone is created by UV radiation breaking the bonds of an O2 molecule, and then the single O atoms bond with another, unbroken, O2 molecule, and form an 03 molecule, which is ozone.
Where is the hottest place you can legally go?
The hottest place on Earth that is accessible to tourists is typically Death Valley in California, USA. The highest temperature ever recorded was 134°F (57°C) in 1913. It is legal to visit Death Valley, but precautions should be taken due to the extreme heat.
Are UV rays classed as alpha radiation?
No, UV rays are a kind of electromagnetic radiation - a kind of light. They have a wavelength shorter than the violet light visible at the edge of a rainbow and hence can't be seen with our eyes.
Alpha radiation, on the other hand, is a kind of matter radiation. As the large, unstable nuclei of certain elements breaks down, it can eject little clumps of protons and neutrons (2 of each - equivalent to a helium nucleus) and it is these little clumps of ejected matter that form alpha radiation.
The word radiation is a little confusing, since people often think that radiation is a thing in itself. In fact, radiation is a description of how things are emitted. Think of a transparent sphere with a light-bulb in the centre and you can imagine the rays of light coming directly out from the centre in straight lines, exactly like the radius of the sphere. Likewise with a little piece of uranium (a radioactive metal element) the little ejected particles will come flying out in straight lines from the centre like the radius of the sphere. It is because each of these is like the RADIus that it is called RADIation.
How can ionOsphere can help us communicating?
Ionosphere can enhance long-distance communication by reflecting radio waves back to Earth, which extends the range of radio transmissions. This can be particularly useful for military, aviation, and emergency communication systems that require reliable long-range communication. Ionosphere can also support satellite communication by enabling signals to travel longer distances without losing strength or clarity.
How can you create a partial vacuum at home?
You can create a partial vacuum at home by using a vacuum pump or by using a manual vacuum pump. Simply connect the pump to a sealed chamber or container, and then pump out the air to lower the pressure inside the chamber, creating a partial vacuum.
The Earth is about 4.5 billion years old and has had an atmosphere since it formed, but about 3.8-4.1 billion years ago there was believed to be the Late Heavy Bombardment, where a planetesimal roughly the size of Mars hit the Earth, breaking off a large chunk that formed into the Moon. This impact would have obliterated the atmosphere, but it has reformed naturally since then.
So, the answer to your question is approximately 4 billion years old.
Earth travels around the sun in light years?
how many light years the earth travels around the sun
No. The Earth travels around the Sun in a measurement of time called a year, which is one revolution or trip around the sun: approximately 584,020,178 miles.
A light year is a measurement of distance that light travels in one year, which is approximately 5.88 Trillion (5,880,000,000,000) miles!
What is heat called that is stored in the atmosphere as a result of evaporation?
the answer is latent
Latent heat is correct, but specifically the latent heat of evaporation of (whatever is evaporated, in this case water) water. When the evaporated water condenses, it releases this latent heat as it precipitates, which is why it tends to feel warmer during rainstorms (unless the water is running down your neck in which case it feels horrible).
A volcano is not limited to 10 parts. It's basic structural portions include: A large magma chamber that can, dependant on it's size, be considered a batholith (ranging many kilometers in area) or a laccolith (smaller). Bedrock, which may be cut with magma to form either dikes (discordant to the bedrock) or sills (concordant to the bedrock) A conduit, which is basically the pipe that feeds the volcano with magma. A throat, which is basically the near-end of the pipe where it begins to widen to allow for the discharge of liquid hot magma (soon-to-be lava, pyroclastic material-- that is, layers of ash/debris that is emitted by the volcanic eruption) A flank, which refers to a particular side of the volcanic structure A base, which refers to the meeting-point of the volcanci structure to the earth's crust/ground. A vent, whcih is an opening that allows for the passage of air.
One factor that could contribute to high levels of carbon dioxide in the air is the burning of fossil fuels such as coal, oil, and natural gas. When these fuels are burned, they release carbon dioxide into the atmosphere, contributing to the greenhouse effect and climate change.
Why isn't the thermosphere a hot place even though it has very high temperatures?
The thermosphere has very low density of molecules, so even though it has high temperatures, there are very few molecules to transfer that heat to objects such as satellites. This is why satellites can operate in the thermosphere without overheating.
Which is most abundant grrnhouse gas in earth's atmosphere?
Water vapor is actually the most common greenhouse gas. However as it plays little part in global warming, and it doesn't stay long in the atmosphere (It is constantly falling as rain) it is not classed as a dangerous greenhouse gas. It contributes to the natural greenhouse effect which keeps the earth comfortably warm.
Carbon dioxide is the Most common greenhouse gas that contributes most to the accelerated greenhouse effect and so to global warming.
What way does heat travel in the atmosphere?
Heat primarily travels in the atmosphere through convection, where warm air rises and cooler air sinks. This process creates vertical movement of air, helping to distribute heat throughout the atmosphere. Additionally, heat can also be transferred through radiation, where the Earth absorbs and emits heat energy from the sun.
What is the exerted weight of an object?
The weight of an object is the force it exerts due to its mass and gravitational pull. On earth, a 1 kg object would 'weigh' 9.8 Newtons.
Burning coal and exhaust from automobiles release carbon into the air?
Yes, burning coal and automobile exhaust release carbon dioxide, a greenhouse gas, into the atmosphere. This accumulation of carbon dioxide contributes to global warming and climate change. It is important to reduce our reliance on fossil fuels and transition to cleaner sources of energy to mitigate these effects.
What molecule could not have been present in an early earth atmosphere and why?
Ozone (O3) could not have been present in an early Earth atmosphere because it is a product of oxygen reacting with ultraviolet radiation. Early Earth's atmosphere lacked the high levels of oxygen needed for ozone formation.
Why is the air a transparent material?
Air is transparent because it consists mainly of nitrogen and oxygen molecules that do not absorb visible light. This allows light to pass through it without being significantly scattered or absorbed, resulting in its transparency.
When was the jet stream discovered?
The jet stream was discovered in the 1940s during World War II by Japanese meteorologists studying air currents. They noticed a strong, high-speed current flowing in the upper atmosphere.
The thin layer of air that surrounds Earth is called?
The thin layer of air that surrounds Earth is called the atmosphere. It is composed of various gases, predominantly nitrogen and oxygen, and plays a crucial role in regulating Earth's climate and supporting life.