How is helium produced in the sun?
The nuclear fusion reactions that produce the sun’s energy are converting hydrogen into helium, changing the relative amount of these two elements present in the Sun. In each nuclear conversion 4 hydrogen atoms are combined to produce a helium atom.
What happens to helium in sun?
The internal core collapses, and heats up, until it is hot enough to fuse helium into larger atoms, for instance, by combining three helium atoms into carbon. At this same time, some helium will fuse with that carbon to produce oxygen.
What is the Sun’s core made of?
The core of the Sun is home to billions and billions of atoms of hydrogen, the lightest element in the universe. The immense pressure and heat pushes these atoms so close to one another that they squish together to create new, heavier atoms. This is called nuclear fusion.
What produced the iron and heavier elements such as gold and silver in Earth’s core and crust?
2. What produced the iron in Earth’s core and the heavier elements like gold and silver in earth’s crust? Elements heaver than iron are produced by rapid nuclear reactions occurred in explosions of some massive stars.
What procedure determined that the Earth’s core is made of iron?
Seismic waves were used to confirm the hypothesis that most of Earth’s core is made of iron.
Why is Earth’s core made of iron?
A. The iron-nickel alloy that composes the inner core is heavier than other elements in the mantle and outer core, causing it to sink to the center of earth. Since both iron and nickel and attracted to magnets earth’s magnetic field drew the to metals into the inner core mixing them into the alloy.
What is the thinnest layer of the earth?
Inner core
What is Earth’s thickest layer called?
core
Where is the thinnest crust on Earth?
The crust is made up of the continents and the ocean floor. The crust is thickest under high mountains and thinnest beneath the ocean.
Which is the hottest layer in the atmosphere?
thermosphere
Which is the coldest layer in the atmosphere?
mesosphere
Which is the hottest and coldest layer of atmosphere?
Coldest layer of Earth’s atmosphere is the MESOSPHERE. The temperature there is -90 degree celsius. It can even go lower. Hottest layer of Earth’s atmosphere is the thermosphere.
What are the 7 layers of the Earth’s atmosphere?
The 7 Layers in Order
- Exosphere.
- Ionosphere.
- Thermosphere.
- Mesosphere.
- Ozone Layer.
- Stratosphere.
- Troposphere.
- Earth’s Surface.
Is Planet Earth a closed system?
The Earth is a closed system for matter That is a list of all basic elemental materials on our planet. Because of gravity, matter (comprising all solids, liquids and gases) does not leave the system. It is a closed box.
How tall is the atmosphere in miles?
Earth’s atmosphere stretches from the surface of the planet up to as far as 10,000 kilometers (6,214 miles) above. After that, the atmosphere blends into space.
Can earth run out oxygen?
A pair of researchers have found evidence that Earth will lose its oxygen-rich atmosphere in approximately 1 billion years. “The lifespan of oxygen-based biosignatures in Earth’s atmosphere remains uncertain, particularly for the distant future,” it said.
Where is the highest oxygen levels on Earth?
At least half of Earth’s oxygen comes from the ocean. The surface layer of the ocean is teeming with photosynthetic plankton. Though they’re invisible to the naked eye, they produce more oxygen than the largest redwoods. Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean.
What percentage of the atmosphere is oxygen?
21 percent
Can you breathe in pure oxygen?
Oxygen radicals harm the fats, protein and DNA in your body. This damages your eyes so you can’t see properly, and your lungs, so you can’t breathe normally. So breathing pure oxygen is quite dangerous.
How does it feel to breathe pure oxygen?
It’s absolutely true: pure oxygen can give rise to feelings of euphoria. Not for the people who inhale it from oxygen vending machines – which, as reported this week, are now being tested in nightclubs – but for the people who sell it.
Can 100 oxygen explode?
There are two kinds of “chemical” explosions: deflagration and detonation. In the former, some kind of fuel burns rapidly in the presence of oxidizer. Gunpowder is one such explosive; coal dust in liquid oxygen another. Obviously, this is also impossible for pure oxygen.
What is more flammable hydrogen or oxygen?
Water is made up of two elements, hydrogen and oxygen. Hydrogen is flammable, but oxygen is not. Flammability is the ability of a combustible material with an adequate supply of oxygen (or another oxidiser) to sustain enough heat energy to keep a fire going after it has been ignited.
Can pure oxygen kill you?
Contrary to popular myth, hyperventilating air at ordinary pressures never causes oxygen toxicity (the dizziness is due to CO2 levels dropping too low), but breathing oxygen at pressures of 0.5 bar or more (roughly two and a half times normal) for more than 16 hours can lead to irreversible lung damage and, eventually.