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When there are one or more substances changing into new substances then a chemical or physical change has occured?
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When substances are different from the starting substances what occured?
This is a chemical reaction.
How can you tell if a chemical change has occured when you mix two substances?
i think it would be that it would be like chemicals like mixing atoms together.
Is broken pieces a sign that a chemical change has occured?
Not really. A broken glass is still glass; no chemical change has occurred. But it is physically different, so it is better to say a physical change happened.
What do historical geologist study?
physical and biological changes that have occured in the past.
What happens in a can of spoiled food as gas is produced?
A chemical reaction of food decomposition occured.
When substances are different from the starting substances what occured?
This is a chemical reaction.
What type of reaction has occured when two or more substances combine to form another substance?
This is called synthesis, a combination chemical reaction that changes the chemical bonds in the substances.
Which observation does not indicate that a chemical reaction has occured?
Change in total mass of substances.
How can you tell if a chemical change has occured when you mix two substances?
i think it would be that it would be like chemicals like mixing atoms together.
How does the chemical equation show that a chemical reaction has occured?
A compund
Is broken pieces a sign that a chemical change has occured?
Not really. A broken glass is still glass; no chemical change has occurred. But it is physically different, so it is better to say a physical change happened.
Is a faded picture a chemical or physical change?
Fading paper is a physical, or mechanical, change. It is such because it does not involve any chemical solutions that a chemical change would require. Fading paper represents a physical alteration in the material similar to cracking, scratching, crushing, abrasion, and other means of disintegration.
When two white compounds are mixed in a solution a yellow solid forms What kind of reation has taken place?
A chemical reaction, because when the two substances were combined a color change and a precipitate formation both occured.
Is a tire inflated with air a physical or chemical change?
physical change. the rubber is still rubber and the air is still air, so NO chemical change has occured
When a substance changes into a difference substance a what change has occured?
chemical change
When water change into ice whatkind of changed has occured?
a physical change
What do historical geologist study?
physical and biological changes that have occured in the past.
