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Is '' Why Does A Flame Need Oxygen '' a statement or a hypothesis?
Wiki User
∙ 9y ago
Typically, a flame needs oxygen and a fuel (e.g., wood).
It's a very popular experiment (eg), from elementary school : put a burning candle on a dish filled with water, cover the candle with an inverted glass: after a little while, the candle flame goes out and the water level inside the glass rises.
The standard explanation (as I recall it) was that combustion "burns" oxygen, and the consummed volume accounts for the extra water that goes inside the glass. Is this correct? I remember feeling (years later) uncomfortable with the explanation, because "to burn" is certainly not "to dissapear": I thought that oxygen combustion produces (mainly) CO2 and hence one oxygen molecule would produce another CO2 molecule, and the volume would remain basically the same. Perhaps CO2dissolves into the water? I would doubt that.
To add to my confusion, others state that the main cause is not the oxygen combustion but the changes of air temperature, that decreases when the flame goes out and makes the air inside the glass contract... which would rather invalidate the experiment as it was (and is) traditionally taught to students.
Wiki User
∙ 9y ago
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Why is a hypothesis a testable statement?
It is because a hypothesis is only a guess.Example:If a plant is not given enough water, then it will die.A hypothesis needs an if (condition) and a then(prediction).Then... you need to make an experiment.
What is needed to form a good hypothesis?
what u need to form a awesome hypothesis is research & statement of the problem. There might be some more so look it up!
Why is a hypothesis important even if the evidence fails to support it?
When working through an idea using the rules of the scientific method, you first must start out with a statement of what you hope to find or prove. It's the "What I want to find" to the Method & Methodologies' "How I am going to find it." Even if the data or evidence fail(s) to support it, you still need the statement of purpose. If the statement and results are not a good fit, then the statement (hypothesis) can be revised or thrown out.
What these is NOT a falsifiable hypothesis?
There are so many things that could not be a falsifiable hypothesis. One statement that is not falsifiable is that humans need air to breathe.
Why do you need a hypothesis?
Because a hypothesis is a question.. so u need a question in order to answer something. to start an whole investigation... u need a questionn (hypothesis)
Is why does a flame need oxygen a topic statement or hypothesis?
Hypothesis
What does a flame need to burn?
For a flame to burn it needs fuel, oxygen, and heat.
Why is it important to test your hypothesis and collect evidence?
A hypothesis is a testable statement. To check the accuracy of your statement, you need to design an experiment to test it and collect data. Then you analyze your data to see how well it supported your hypothesis.
Why does the flame get hotter when the air inlet is correctly set?
more oxygen is flowing to the flame, to create fire you need heat, fuel and oxygen.
How are an animal and a candle flame alike?
well both an animal and a flame candle need oxygen to survive
Why does kerosene burn with a blue flame in wick stove but produces a yellow flame when burnt in a lamp?
Generally, the more oxygen supplied to a flame, the hotter and bluer the flame is.Wick stoves need to be hot, so they are designed to allow lots of oxygen to get to the flame, which also makes it bluer.Lamps just need to be bright, so the oxygen input is regulated by valves in order to achieve a more yellow, cooler flame.
Why is a hypothesis a testable statement?
It is because a hypothesis is only a guess.Example:If a plant is not given enough water, then it will die.A hypothesis needs an if (condition) and a then(prediction).Then... you need to make an experiment.
Is a hypothesis the phrase immediately following the word then is called the hypothesis of a statement?
OK, need to re-word that a bit due to restrictions on asking a question on this site. If only we could use commas and other characters."Is a hypothesis, the phrase immediately following the word 'then', called the hypothesis of a statement?"No, the phrase immediately following the word "then" is the conclusion. They hypothesis is the phrase following the word "if".However, answering the rest of the question, the hypothesis would be called the hypothesis of a statement.
When a glass jar is placed over a lighted candle the flame goes out why does its happen?
A flame uses oxygen in order to burn. By placing a jar over it, it limits the oxygen causing the flame to burn out. That is one reason house fires are dangerous, because fire burn oxygen and we need oxygen to breathe
What does a candle need to burn?
Because candles need feul, oil, and oxygen to burn.Without oxygen it will burn out.
What is needed to form a good hypothesis?
what u need to form a awesome hypothesis is research & statement of the problem. There might be some more so look it up!
Why does turning the collar on a busen burner make the flame hotter?
Flames need air to expand and grow, or become hotter. The oxygen circles the flame and makes the flame alter. The collar allows air to get to the flame.
