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New Year… New Unit… What are we learning about next!??

In this chemistry unit, students will learn about the properties of matter, including its physical and chemical characteristics. They will also explore the different changes matter can undergo, such as physical changes and chemical changes. The unit includes hands-on activities and observations to deepen understanding.

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New Year… New Unit… What are we learning about next!??

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  1. New Year… New Unit… What are we learning about next!??

  2. Chemistry Unit! • 1. Traffic Lights…know?new?yikes! • 2. What is Matter!?!?! • 3. Properties of Matter • 4. Changes in Matter

  3. Matter: • anything that has mass and volume • it’s all around us!

  4. Properties • Characteristics & behaviours that describe matter • Can be physical or chemical

  5. Observing Properties of matte • Qualitative observations: • Involves your 5 senses: • sight, touch, smell, sound, odor • Quantitative observations: • Involves specific measurements & numbers

  6. Observing the Properties of Matter…Warm Up Activity • Materials for each group: • a white board & pen • A brown paper bag with a mystery item in it • Your group will: • Feel the item without looking at it first! Record what you feel • Look at the item without showing any other groups, make qualitative observations & quantitative if possible! • When instructed, pass the white board on to a new group… can they guess what you mystery matter was

  7. Physical Properties

  8. Chemical Properties

  9. Changes in matter can also also be:I. Physical andII. Chemical

  10. PhysicalChange • Matter stays the same, but changes in: • Appearance!

  11. How to tell the difference?!

  12. It’s a physical change if • It changes shape or size • It dissolves.

  13. It’s a physical change if... • It changes phase (freezes, boils, evaporates, condenses)

  14. Examples • Frost forming over night from rain on a windshield • A puddle evaporates

  15. Chemical Change • The matter changes to a different type of matter with: • new properties

  16. It’s a chemical change if…. • It burns • Temperature changes without heating/cooling

  17. It’s a chemical change if... • It bubbles (makes a gas)

  18. It’s a chemical change if... • It changes color • It forms a precipitate (a new solid)

  19. Examples of Chemical Changes • Burning Toast • Making scrambled eggs

  20. In class assignment: • Observe the kitchen scene on your handout… • For each numbered box record: • i) what the item or situation is • ii) the type of change (physical or chemical) • iii) reasoning for choosing this type of change

  21. Compost Kettle Boiling Chemical Change Physical Change Toast Gas (smell) released Change of State Chemical Change Cooking Ice Melting Physical Change Change of state Rusty Handle Chemical Change Iron Handle reacts with Oxygen- corrodes Bacon & Eggs Cooking Chemical Change Irreversible Change

  22. Matter- Lesson 2: • Rapid Review… check last`s work • Demo….magnesium ribbon (chem or phys change!) • Experiments (back side of last day`s handout)

  23. What kind of change is it if someone... • Tears up paper? • Physical change • Mixes salt and water? • Physical change

  24. What kind of change is it if someone... • Burns paper? • Chemical change • Evaporates salt water? • Physical change

  25. What kind of change is it if someone... • Mixes vinegar and baking soda? • Chemical change

  26. Making Connections… Many First Peoples of BC are expert canoe makers. Question: What understandings about properties and changes of matter do you think First Peoples developed to perfect the science & art of canoe making?

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