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You can tell if something is a chemical changes or a physical change.
Examples:
Question 1) Ice melting.
Answer 1) Physical change because nothing has changed just the shape of the ice. Reversing ice is easy.
Question 2) Wick on a candle changes colour from white to black.
Answer 2) Chemical change because it changes from clack to white and will be hard to reverse.
So if it is a chemical change taking place it hard to convert back or reverse. You can also tell by the change of colour.
Wiki User
∙ 13y ago
Kaitlyn Hall
A new substance has formed
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What are 3 list of chemical change?
You know a chemical change happened if: -A change in color -Formation of a precipate (a solid) -Formation of a gas
How do you know if a change is physical?
An alteration of a substance that does not affect its chemical composition. A change in size and shape would be an example.
A change in matter that produces new substances is called?
Chemical change. References: Intro to Matter book.
If a substance changes color what has most likely happened chemical or physical change?
Very probable a chemical change; but also physical changes can be the cause.
Is mixing juice crystal a chemical or physical change?
It depends what happened to the glass of juice...? An object is not a change =P
What are 3 list of chemical change?
You know a chemical change happened if: -A change in color -Formation of a precipate (a solid) -Formation of a gas
How do you know if a change is physical?
An alteration of a substance that does not affect its chemical composition. A change in size and shape would be an example.
A change in matter that produces new substances is called?
Chemical change. References: Intro to Matter book.
What happened when a new substance has been forme?
a chemical change
What are the five ways to know that chemical reaction happened?
don't know
If a substance changes color what has most likely happened chemical or physical change?
Very probable a chemical change; but also physical changes can be the cause.
Why is food darkening a chemical change?
This darkening involve chemical reactions.
How do you know if a candle is a chemical change?
Can you reverse the change?
Is mixing juice crystal a chemical or physical change?
It depends what happened to the glass of juice...? An object is not a change =P
How do you know that baking bread is a chemical change and not a physical change?
Its a chemical change because its changing what it is (from dough to bread)
Is hydrofluoric acid attacking glass a physical or chemical change?
Does anyone know
What should not be used to indicate a chemical reaction?
Change of shape can not be used to indicate a chemical reaction has happened. Examples of evidence of a chemical reaction are changes in odor or color.
