there are four sketches below. the first sketch shows a sample of substance x. the three sketches underneath…

there are four sketches below. the first sketch shows a sample of substance x. the three sketches underneath it show three different changes to the sample. you must decide whether each of these changes is possible. if a change is possible, you must also decide whether it is a physical change or a chemical change. each sketch is drawn as if the sample were under a microscope so powerful that individual atoms could be seen. also, you should assume that you can see the entire sample, and that the sample is in a sealed box, so that no matter can enter or leave. change 1 is: impossible a physical change a chemical change change 2 is: impossible a physical change a chemical change change 3 is: impossible a physical change a chemical change

there are four sketches below. the first sketch shows a sample of substance x. the three sketches underneath it show three different changes to the sample. you must decide whether each of these changes is possible. if a change is possible, you must also decide whether it is a physical change or a chemical change. each sketch is drawn as if the sample were under a microscope so powerful that individual atoms could be seen. also, you should assume that you can see the entire sample, and that the sample is in a sealed box, so that no matter can enter or leave. change 1 is: impossible a physical change a chemical change change 2 is: impossible a physical change a chemical change change 3 is: impossible a physical change a chemical change

Answer

Explanation:

Step1: Understand physical and chemical change

Physical change - no new substances formed, just change in state or appearance. Chemical change - new substances with different chemical properties formed.

Step2: Analyze Change 1

The molecules in Substance X are completely different from the starting - substance. New substances are formed. So it is a chemical change.

Step3: Analyze Change 2

The arrangement of molecules has changed, but the molecules themselves are the same. No new substances are formed. So it is a physical change.

Step4: Analyze Change 3

Some of the molecules have broken apart into smaller units, forming new substances. So it is a chemical change.

Answer:

Change 1 is: a chemical change Change 2 is: a physical change Change 3 is: a chemical change