Today in the class, Aashir asked that if oxygen is not present beyond the atmosphere and fire needs oxygen to burn, then how come the sun is made of fire as there is no oxygen present there. Very Interesting! Now, search on the net and share your answers here!
Happy googling! :-)
The sun doesn't 'burn', and it doesn't need any oxygen to do what it's doing, or to
ReplyDeletegenerate the energy that it's producing.
I once read about a calculation that somebody did, where they figured out how long the
sun would last if it was completely made out of coal, and the coal burned fast enough to
produce the amount of energy that the sun actually produces.Stars do not burn like a fire, they produce their heat by a process called nuclear fusion where hydrogen is converted into helium (like in a hydrogen bomb).
The sun is not a ball of fire.It is a very huge star and does not need oxygen to burn.
DeleteExcellent Zainab! You are right. The sun produces heat and light through a process called nuclear fusion. In this process atoms of hydrogen are joined together to obtain helium and release energy. Oxygen is not required in this process. Remember! This is a nuclear reaction and where oxygen is required for something to burn like a log in a fireplace is called a chemical reaction.
DeleteCorrect Deva!
DeleteOn September 17th, 1998 the Ithaca Journal ran its first "Ask A Scientist!" article in which Professor Neil Ashcroft , who was then the director of CCMR, answered the question "What is Jupiter made of?" Since then, we have received over 1,000 questions from students and adults from all over the world. Select questions are answered weekly and published in the Ithaca Journal and on our web site. "Ask A Scientist!" reaches more than 21,000 Central New York residents through the Ithaca Journal and countless others around the world throught the "Ask a Scientist!" web site.
ReplyDeleteAcross disciplines and across the state, from Nobel Prize winning scientist David Lee to notable science education advocate Bill Nye, researchers and scientists have been called on to respond to these questions. For more than seven years, kids - and a few adults - have been submitting their queries to find out the answer to life's everyday questions.
Interesting! So what kind of questions have they been asking Barik?
Deletethe sun and stars do not burn like fire, They produce their heat by a process called nuclear fusion where hydrogen is converted into helium. Therefore no oxygen is needed by the sun.
ReplyDeleteVery good Maha! You are 101% right!
DeleteAbout three quarters of the Sun's mass consists of hydrogen, while the rest is mostly helium. Sun burns by the process of Nuclear Fusion. In Nuclear Fusion, the hydrogen gas in the core of the Sun gets squeezed together so tightly that four hydrogen nuclei combine to form one helium atom. In the process some of the mass of hydrogen atoms is converted into energy in the form of light. So, oxygen does not take part in this process.
ReplyDeleteGood explanation Natdhanisha! :-)
Deletethe sun dosnt burn it acctualy give off energy
ReplyDeletei have questions!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ReplyDelete1 who is the smartest person in the world?
2 what is carbondioxides "cousin"?
I think Stephen W. Hawkins is the smartest person in the world.
DeleteCarbon monoxide is the cousin of carbon dioxide.
I hope you're happy now Mustafa!! :-) Now you can ask all your interesting questions!!
DeleteThe way the Sun "burns" fuel is completely different from the way a fire on Earth burns (the term "burning" is a bit misleading when used to talk about stars). The Sun gets its energy by smashing small light elements together to make heavier elements; most of a star's life is spent smashing hydrogen atoms together to make helium. The burning that a star does, then, is a nuclear reaction, and not a chemical one like the fires on Earth.
ReplyDeleteExcellent Hamzah!! You are right!
Deletethere are ten smartest people .there name are Stephen.w hawking , Kim ung-yong, Paul Allen, rick rosner, Garry kasparov,SIR Andrew wiles, judit plogar, James wood, Terrence tao and Christopher hirara these are name of all smartest people in the world and carbondioxides "cousin" is inodioxide. I think so OKKKKKKKKKKKKKK!!!!!!!!!!!!!!!!!!
ReplyDeleteSun is composed of many gases including 70% hydrogen, about 28% helium and 1.5 % of carbon, nitrogen, oxygen and neon.
ReplyDeleteSun does not burn but actually shines because of the hot glowing gases at its core and in its gaseous atmosphere. The hydrogen on sun is extremely heated up to helium and releases extraordinary amount of heat and light. This process is not called burning but nuclear fusion. The oxygen is not required for nuclear fusion.
Wonderful Explanation Rubab!!
DeleteIt's not burning chemically, like a fire in your fireplace, it's using nuclear fusion.
ReplyDeleteTrue!
DeleteTerrence Tao is the smartest person in the world.
ReplyDeleteCarbon dioxide is the cousin of carbon monoxide.
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteI have questions!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ReplyDeleteWhat country has the largest population in the world?
What country has the second largest population in the world?
China has the largest population in the world.
ReplyDeleteIndia has the 2nd highest population in the world.
ReplyDeleteWhat is the purpose of vaccination?
ReplyDeleteWhat do white corpuscles do?
Why does the sun burn more in the mountain?
I don't know
ReplyDeleteChandra Bahadur Dangi from nepal is the smallest man in the world
ReplyDeleteWhat is a mapmaker called?
ReplyDeleteA mapmaker is called a cartographer.
DeleteYou are right Shahmir it is called a cartographer
Deletean mapper
ReplyDeleteI think so a map maker
ReplyDeleteoh my! I am fascinated to see how much my class loves to share facts!! I think this is great, you will be learning as well as sharing such interesting stuff with each other.. Keep it up my little Einsteins!!! :-)
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteQ.2.
ReplyDeleteAns.When I put the beaker near the windowsill.After one day little water evaporated.After two days half of the water evaporated.After three days some of the water evaporated and after four days the whole water evaporated.
The Sun's heat evaporated all the water in the glass.
Q.3.
Ans.When you put the rug or blanket on the fire, the rug presses the fire and so it dicreases the oxygen and the fire easily turns off.
Q.4.
Ans. When a crowd of people are in a closed room the oxygen dicreases and people feel hot and drowsy. People should open the doors and windows to let fresh air come inside so the amount of air increases.
Shahmir gave the correct answer to my question
ReplyDeleteQ1.What is a human body made up of ?
ReplyDeleteBlood and Bones
DeleteYour pretty much right Deva
DeleteQ2.When did men live in caves?
ReplyDeleteHUMAN BOBY IS MADE UP OF STAR DUST . MAN LIVE IN CAVES TO PROTECT THEM SELF
ReplyDeleteMen lived in caves in the stone age
ReplyDeleteQ.1.What animals eat dead meat?
ReplyDeleteBird?
ReplyDeleteThey are birds but special ones
ReplyDeleteVultures
DeleteQ) what 2 keys don't open any locks
ReplyDeleteMonkey and Turkey
ReplyDeleteEasy RAYHAN
ReplyDeleteQ2)A blue house is made of blue bricks. A yellow house is made of yellow bricks. A red house is made of red bricks. An orange house is made of orange bricks. What would a green house be made of?
ReplyDeleteA green house would made of a green bricks.
ReplyDeletewrong natdhanisha, it's something else
Deletea green house is made of glass aha
ReplyDeletecorrect isbah
DeleteI have a question
ReplyDeleteWho created the first light bulb
Thomas Alva Edison created the first light bulb
Deletecorrect
ReplyDeleteAnother question?
Who created telephone?
Graham Bell created the first telephone
ReplyDeleteCorrect
ReplyDeleteWho invented the bifocal lens?
ReplyDeletebenjamin franklin
ReplyDeleteI've got a question?
ReplyDeleteQ1.What is the tallest animal on land which is not extict?
Q2.Which flying bird can swim?
correct deva
ReplyDeleteQ3)What is the best way to keep your hat from falling off your head?
ReplyDeleteAuks are the birds which can fly and swim
ReplyDelete