Question

When the weather starts to cool down, some people in the Midwest like to toast marshmallows over a fire to make a dessert sandwich called a s'more.A marshmallow was toasted at a constant temperature in a laboratory. Use the gif and table below to answer the following questions.Mass Odor Temperature TextureBefore 25.21 g Slight sweet smell 23 °C SquishyAfter 23.78 g Smell of burned sugar and sweetness 105 °C Crumbly with a liquid centerClaimIs toasting a marshmallow a chemical or physical change?(1 point)ResponsesToasting a marshmallow is a chemical change.Toasting a marshmallow is a chemical change.Toasting a marshmallow is not a chemical change. It is only a physical change.Toasting a marshmallow is not a chemical change. It is only a physical change.Toasting a marshmallow is not a chemical or physical change.Toasting a marshmallow is not a chemical or physical change.Question 2Evidence and ReasoningLook at your answer for the previous question. Why did you decide that toasting a marshmallow was a chemical change, physical change, or neither? Make sure to explain what data you used to make that decision. You should show that you understand the difference between a chemical and a physical change.Optional Sentence Starters:I decided toasting marshmallows is ___________ because __________________.In the table it shows __________________.In the gif it shows ________________.This supports my choice because ___________.Grading Rubric2 point - clearly explain why you chose a physical change, chemical change, or neither for the previous question (make sure to use key terms)1 point - use data from the gif and the table to support your answer1 point - write in full sentences with proper grammar(4 points)

Answer 1

Claim: Toasting a marshmallow is a chemical change.

Evidence and Reasoning: I decided toasting marshmallows is a chemical change because there are observable changes in composition and properties. In the table, it shows that before toasting, the marshmallow had a slight sweet smell and a squishy texture at 23 °C. After toasting, the mass of the marshmallow decreased to 23.78 g, and it produced a smell of burned sugar, which indicates the formation of new substances. Additionally, the texture changed from squishy to crumbly with a liquid center at a significantly higher temperature of 105 °C. This supports my choice because the change in mass, the introduction of new smells, and the alteration of texture demonstrate that a chemical reaction has occurred, involving the breaking and forming of chemical bonds, rather than just a physical change where only the state of matter would change without altering the substance.