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Lab 1.1 Vocabulary Turn to your vocabulary section

Lab 1.1 Vocabulary Turn to your vocabulary section. 1. Endothermic: a chemical reaction that absorbs heat. 2. Exothermic : a chemical reaction that releases heat. 3. P ure S ubstance : a substance that appears to be made of only one thing.

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Lab 1.1 Vocabulary Turn to your vocabulary section

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  1. Lab 1.1 VocabularyTurn to your vocabulary section

  2. 1. Endothermic:a chemical reaction that absorbs heat

  3. 2.Exothermic: a chemical reaction that releases heat.

  4. 3.Pure Substance: a substance that appears to be made of only one thing.

  5. 4. Volume:the amount of space an object takes up.

  6. 5. Displacement:the movement of liquid caused by the volume of a solid object.

  7. 6. Soluble:Able to be dissolved in a solvent (water) **Insoluble

  8. 7. Immiscible:not able to evenly mix.

  9. 8. Dissolve:to form a solution (evenly mixed, one color) by mixing a substance with water.

  10. Lab 1.1 • NOTES Turn to your notes section

  11. Inquiry 1.1: The Bottle and the Balloon • Observation: The bottle expanded when heated and contracted when cooled. • Conclusion: Air’s volume expands or contracts depending on temperature. • Application: a basketball left in a garage over winter.

  12. Inquiry 1.2: Similar Objects • Observation:When the solid objects were added to the liquid, the original level of the liquid rose to a higher level. • Conclusion:The volume of the solid displaced the volume of the water. • Application: Too much ice in a drink.

  13. Inquiry 1.3: The Burning Candle • Observation: The flame goes out when the jar is placed over the candle. • Conclusion:Fire needs oxygen to burn. • Application: Fire blankets

  14. Inquiry 1.4: Describing Matter • Observation: The rock seems to be made of more than one color. The shaving cream appears to be all one color and texture. • Conclusion: Neither of these objects are pure substances • Application: Is milk a pure substance?

  15. Inquiry 1.5: Adding Water • Observation: The sand did not dissolve. The purple crystal did dissolve. • Conclusion: The sand is insoluble in water. The crystal is soluble in water (it dissolved). • Application:Diluting wastewater.

  16. Inquiry 1.6: Mixing Liquids • Observation: There are two layers of liquid in the container. • Conclusion: The two liquids are immiscible. • Application: Italian Salad Dressing

  17. Inquiry 1.7: Floating and Sinking • Observation: The cup shaped pan floated and the folded pan did not float • Conclusion: Air helps objects to float. Increased surface area also helps objects to float. • Application: Rafts, life jackets. When floating in a pool, hold your breath and spread your arms and legs.

  18. Inquiry 1.8: Reacting a Tablet • Observation: The reaction produced gas and the temperature lowered. • Conclusion: Chemical Reactions can absorb or release heat. This reaction was endothermic. • Application: Alka Seltzer reduces acid/heat in stomach (indigestion).

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