Question 1 A)Which of the following is an example of only a physical change?(1 point) Responses the smell of rotten eggs the smell of rotten eggs the creation of table salt the creation of table salt dry ice becoming vapor dry ice becoming vapor the green color of the Statue of Liberty the green color of the Statue of Liberty Question 2 A)Which of the following demonstrates a chemical change?(1 point) Responses iron (Fe) reacting to water((H2O)(H2O)) and oxygen(O) to form iron oxide(Fe2O3Fe2O3) iron (Fe) reacting to water(open paren cap h sub 2 cap o close paren) and oxygen(O) to form iron oxide(cap f e sub 2 cap o sub 3) steam condensing on a mirror steam condensing on a mirror sugar and water mixing to create sugar water sugar and water mixing to create sugar water dry ice vaporizing dry ice vaporizing Question 3 A)Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?(1 point) Responses test for the release of heat test for the release of heat monitor for the release of a gas monitor for the release of a gas conduct a test to determine the chemical makeup of the molecules conduct a test to determine the chemical makeup of the molecules observe a color change observe a color change Question 4 A)Which of the following happens during a chemical change but does not happen during a physical change?(1 point) Responses Atoms of one or more substances rearrange into a new substance. Atoms of one or more substances rearrange into a new substance. The state of the substance changes. The state of the substance changes. The mass of the substance changes. The mass of the substance changes. The appearance of a substance changes, but it is still the same substance. The appearance of a substance changes, but it is still the same substance. Question 5 A)Which of the following example demonstrates the reversibility of a chemical change?(1 point) Responses recharging batteries recharging batteries dehydrating sugar water dehydrating sugar water refreezing carbon dioxide gas into dry ice refreezing carbon dioxide gas into dry ice the rotting of eggs the rotting of eggs

Answer 1

Here are the answers to your questions:

Question 1
A) Which of the following is an example of only a physical change?
Response: dry ice becoming vapor

Question 2
A) Which of the following demonstrates a chemical change?
Response: iron (Fe) reacting to water (H2O) and oxygen (O) to form iron oxide (Fe2O3)

Question 3
A) Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?
Response: observe a color change

Question 4
A) Which of the following happens during a chemical change but does not happen during a physical change?
Response: Atoms of one or more substances rearrange into a new substance.

Question 5
A) Which of the following examples demonstrates the reversibility of a chemical change?
Response: recharging batteries

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