I have an exam before that i have to figure out old mistake, please help me
A scientist is performing an experiment on a
powder. Which of the following is a sign that a chemical change has definitely occurred during his experiment?
The powder catches on fire.
The powder releases bubbles.
The powder heats up.
The powder breaks apart into smaller particles.
Stacey Warren - Expert brainly.com
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@Frostbite can you able to help me?
please help me guys :(
If I have to be honest. I don't know because it is a very bad question. If it stood to me it could be all of them.