Question

build your argument through claim, evidence, and reasoning

1. sep construct written arguments is a phase change a physical change or a chemical change? use the claim - evidence - reasoning framework to build a scientific argument. after stating your claim, support it with evidence and scientific reasoning.

make a claim your claim should be a response to the stated question. place only what you intend to argue. if appropriate, use relevant vocabulary you have learned in this course.
cite evidence/data provide at least 2 observations that can be used to justify your claim. avoid \i\ statements. if possible and appropriate, use multiple sources.
use reasoning if applicable, state the definition(s) of the vocabulary used in the claim in your own words. then summarize the data and state how that aligns with the definition or previous claim. if there is a known relevant scientific principle that explains the phenomena, state that and use it to explain what causes your claim to be true. be as detailed as possible.
evaluate and revise your argument

1. sep critique share your written argument so that it can be critiqued by one or more classmates. listen closely and record their feedback. what flaws or weaknesses did your peers identify in your argument? if a counter - argument was proposed, do you agree or disagree with the reasoning?
2. sep evaluate evidence and reasoning based on the feedback you have received, write an improved draft of your argument.

revise the claim write only the claim. while revising your claim, consider the following:

• was the original claim flawed?
• how might you modify it in response to criticism?

reassess the evidence provide at least 2 pieces of evidence for your new claim. consider:

• any previous evidence that is applicable,
• new or previously missed evidence that is relevant that can strengthen your claim, and
• any existing evidence that can be interpreted differently.

reinforce the reasoning as before, use your evidence, definitions, and scientific knowledge to justify your claim. consider:

• ways to strengthen your reasoning,
• providing very detailed explanations, and
• if applicable, add reasoning to refute alternative explanations.

Explanation:

A phase - change is a physical change. Evidence: When ice melts into water, the chemical composition of water (H₂O) remains the same before and after the change. Also, when water evaporates into steam, it is still H₂O chemically. Reasoning: A physical change is a change in which the substance's chemical identity remains the same, only its physical state (solid, liquid, gas) changes. In phase - changes like melting, freezing, evaporation, and condensation, the molecular structure and chemical bonds of the substance do not break or form new ones.

Answer:

Claim: A phase change is a physical change.
Evidence 1: Ice melting into water; same chemical composition (H₂O) before and after.
Evidence 2: Water evaporating into steam; still H₂O chemically.
Reasoning: Physical change means chemical identity remains same, only physical state changes. In phase - changes, molecular structure and chemical bonds don't break/form new ones.