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False because the wax would have gone through a physical change since it has only melted and turned into liquid but you can reverse the effect by cooling it so it becomes a solid again. (No new substance formed)
When the string is burned by the fire, the change is irreversible. Also, when the string is burned, new substances are created like gases and ash making it a chemical change. Since no new substance forms when the candle wax melts, that's why it is a physical change, not a chemical change.
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Is changing thesize and shape of pieces of wood a chemical change true or false?
false
During a chemical change the form of a substance is altered but not its identity true or false?
The statement is false: A chemical change of a substance is defined as a change in which the substance is not the same substance after the change as it was before.
Is a physical change what happens when chemical bonds break and new bonds form?
NO, that's an example of a CHEMICAL change
When iron is heated until it turns red the color change shows that a chemical change has occured?
False.
When chemical change takes place the total number of atoms changes?
False.
Is this true or false in a chemical change other forms of energy cannot be changed to chemical energy?
False
Dissolved salt in ocean water is an example of a chemical change true or false?
false
Is changing thesize and shape of pieces of wood a chemical change true or false?
false
During a chemical change the form of a substance is altered but not its identity true or false?
The statement is false: A chemical change of a substance is defined as a change in which the substance is not the same substance after the change as it was before.
The chemical properties of the aluminum change as you cut the can?
FALSE
True or false .During a chemical change atoms are lost or gained to the new substance?
False
A chemical reaction causes a chemical change true or false?
It is true that a chemical reaction causes a chemical change. An example of this can be seen by adding baking soda to vinegar.
When water changes to steam it undergoes a chemical change true or false?
No. It is still water. So that makes it a physical change.
Is it true or false for A Change In State Is A Physical Change?
True. A physical change is a change from one state to another without a change in chemical chemistry.
Is this true or false in a chemiccal change other forms of energy cannot be changed to chemical energy?
This is false.
Is a physical change what happens when chemical bonds break and new bonds form?
NO, that's an example of a CHEMICAL change
Is changing the size and shape of pieces of wood a chemical change true or false?
False. Changing the size and shape of pieces of wood is a physical change because the wood's composition does not change.
