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Reasoning statement for a CHEMICAL CHANGE

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Reasoning statement for a CHEMICAL CHANGE

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C: Burning sugar is a
E: color change, smell emitted

R1: Burning sugar is a chemical change because the color changes and a smell was produced, therefore a new substance was formed.

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REASONING STATEMENT FOR PHYSICAL CHANGE:

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REASONING STATEMENT FOR PHYSICAL CHANGE:

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C: Crushing chalk is a physical change
E: change in shape and texture

R1: Crushing chalk is a physical change because there was no new substance formed.  In the crushing of the chalk, only a change in size occurred.

R2: If there is only change in shape and texture, then crushing chalk would be a physical change and no new substance was formed.

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Scientific DATA used to SUPPORT YOUR CLAIM that its a CHEMICAL CHANGE 

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Scientific DATA used to SUPPORT YOUR CLAIM that its a CHEMICAL CHANGE 

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color change
temp change
burning/smoke
fizzing
PPT (solid forming)
light/sound/heat production
smell produced

***NEW SUBSTANCE FORMED!***

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Scientific DATA used to SUPPORT YOUR CLAIM that its a PHYSICAL CHANGE

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Scientific DATA used to SUPPORT YOUR CLAIM that its a PHYSICAL CHANGE

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changing shape

Phase Changes:
dissolving/recrystalizing
evaporating/condensing
freezing/melting
boiling

Mixed/separated
bubbling

***reversible - changes the form of the substance (still the lab substance!***

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Potential Claims for our Types of Change Lab

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Potential Claims for our Types of Change Lab

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1. I believe that crushing chalk is a physical change.
2. Based on my observations burning sugar was a chemical change.

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Tie together your CLAIM and your EVIDENCE

Shows how HOW or WHY the data counts as evidence to support the claim.

Provides JUSTIFICATION for why this evidence is important to this claim.

Includes one or more SCIENTIFIC PRiNCIPLES that are important to the evidence.

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Scientific data used to support the CLAIM.

Make sure you use enough evidence to support your claim

Must be appropriate  evidence!

It should use one or both types of key observations:

Qualitative Data (using senses) and/or Quantitative Data (numerical).

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Statement about the results!

A one sentence answer to the question you investigated.

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Speak with authority about a topic!