1.4 physical and chemical changes.notebook · 2019. 9. 23. · 1.4 physical and chemical...
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1.4 Physical and Chemical Changes.notebook
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September 23, 2019
Warmup
Without looking at your notes list 5 physical properties and 2 chemical properties.
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1.4 Physical and Chemical Changes.notebook
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September 23, 2019
Lab - 10 minutes to finish
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1.4 Physical and Chemical Changes.notebook
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September 23, 2019
Physical and Chemical Changes(p. 28-30 textbook)
Matter can undergo changes that are either physical or chemical
Physical Change: the substance may change its appearance but the particles of the substance remain the same.
Examples:
Chemical Change: the original substance(s) react to create a new substance or substances that have different properties.
Examples:
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1.4 Physical and Chemical Changes.notebook
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September 23, 2019
Physical changes include:
1. Breaking/tearing (size)ex:
2. Changes of stateex:
3. Dissolvingex:
4. Change in durabilityex:
5. Change in textureex:
Physical changes are usually (but not always) easily reversible.
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1.4 Physical and Chemical Changes.notebook
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September 23, 2019
Evidence of Chemical Change (p.30)
1. Difficult to reverse
2. A solid precipitate form in a liquid
3. New colour
4. Bubbles (gas) made
5. Odour change
6. Temperature change (heating or cooling from the reaction, not an outside source)
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1.4 Physical and Chemical Changes.notebook
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September 23, 2019
Classwork/Homework:• Finish the lab due AT THE BEGINNING OF CLASS TOMORROW• Classifying properties and changes worksheet• Textbook p. 30 #1 and 4
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