rust on an iron fence. Chemical or physical change?
chemical
Give 3 exmaples of a physical change (where the substance remains the same) (they don't have to be from your book)
broken pot, ice that melts, water solidifies
do you think photosynthesis is an example of a phisical or chemical change?
since water and carbon dioxide combine to form glucose and oxygen, its a clear exmaple of a chemical change
Freezing Juice? Physical or chemical change
Physical
Is melting butter for popcorn a chemical or physical change?
physical
Which is an example of a chemical reaction? paper cut into small pieces, chocolate melting in a pan, flour and sugar mixed in a bowl, cookies baking in an oven
cookies baking in an oven
Which of the following is NOT an example of a physical change? crumpled paper, pencil sharpening, shrunken clothing, or rust
rust
What is a sign that a chemical reaction has occurred?
change of color, presence of sediment or precipitate, production of gas, release of heat, etc
Give 3 examples of a chemical change (where the nature of the substance changes) (from your book or not)
iron that oxidises, food rotting, a match that burns
A change where one or more new substances are created?
chemical
What are the two different types of changes of a substance?
In one type of change the substance remains the same (physical) and in the other it becomes different (chemical)
When you have a fire with your friends, what kind of chemical change is happening?
Chemical change (the wood is different than how it looked at the beginning after it has burned.)
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