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Solids, Liquids, Gases

Solids, Liquids, Gases. Ch 16 09-10. Phase Change Graphs. Shows the temperatures at which substances change from solids to liquids, liquids to gases Can show time or energy needed to make the changes. Phase changes - Adding energy. Phase changes – Giving Off energy.

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Solids, Liquids, Gases

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  1. Solids, Liquids, Gases Ch 16 09-10

  2. Phase Change Graphs • Shows the temperatures at which substances change from solids to liquids, liquids to gases • Can show time or energy needed to make the changes

  3. Phase changes - Adding energy

  4. Phase changes – Giving Off energy

  5. Water Phase Change Graph

  6. During a phase change, such as melting or boiling, the Temperature remains the same. • During a phase change, such as melting or boiling, the energy is changing. • On the phase change graph, the energy/time is the independent variable. • On the phase change graph, the temperature is the dependent variable.

  7. Density • DEF: amount of mass in a certain volume. • Density is a physical property.

  8. Circle Formula

  9. What is the density of a 140g block of wood whose volume is 200mL?

  10. What is the density of a piece of iron that has a mass of 16.4 g and a volume of 2.08 mL?

  11. What is the density of a granite block that has a volume of 47 cm3 and a mass of 220 g?

  12. If a block of tungsten has a mass of 97 g and a volume of 5 cm3, what is the density of the tungsten block?

  13. Ice has a density less than water. If you have a 34 g block of ice with a volume of 38 mL, what is the density of the ice block?

  14. Water’s density is 1g/mL. Objects density < 1 will float in water Objects density > 1 will sink. in water Floating VS Sinking

  15. Gas Laws Sections 2 - 3

  16. Objectives • 16-2 Explain and apply Gas Laws. • 16-3 Determine the viscosity of a liquid.

  17. High viscosity  pours slowly EX: Low viscosity  pours fast/easily EX: Viscosity – DEF: Resistance to flow

  18. Pressure • DEF: Amount of force exerted per unit area

  19. Caused by • In gases • Particles hitting each other • In liquids & solids • Pushing down

  20. Pressure on your hand activity • See worksheet packet for directions

  21. Relationships • Higher altitude = lower air pressure • Lower altitude = higher air pressure

  22. Relationships • Deeper under water = higher water pressure • Shallow water = lower water pressure

  23. Thermal Expansion • DEF: A substance increase in size as temperature increases • It will decrease in size as the temperature decreases

  24. Thermometers • As temp rises, fluid takes up more space • Hot Air Balloons • As temp rises, air less dense, Hot Air Balloon moves upward • Bridge Joints • As road expands, would push up if no place to go

  25. Thermal expansion in gases is involved with 2 gas laws. • Boyle’s Law • Charles’ Law • Off to the SMART Notebook

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