# solids, liquids, gases

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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. - PowerPoint PPT Presentation

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• Solids, Liquids, GasesCh 16 09-10

• Phase Change GraphsShows the temperatures at which substances change from solids to liquids, liquids to gasesCan show time or energy needed to make the changes

• Phase changes - Adding energy

• Phase changes Giving Off energy

• Water Phase Change Graph

• 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.

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

• Circle Formula

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

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

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

• 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?

• 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?

• Floating VS SinkingWaters density is 1g/mL.Objects density < 1 will float in waterObjects density > 1 will sink. in water

• Gas LawsSections 2 - 3

• Objectives16-2 Explain and apply Gas Laws.16-3 Determine the viscosity of a liquid.

• Viscosity DEF: Resistance to flowHigh viscosity pours slowlyEX:Low viscosity pours fast/easilyEX:

• PressureDEF: Amount of force exerted per unit area

• Caused byIn gasesParticles hitting each otherIn liquids & solidsPushing down

• Pressure on your hand activitySee worksheet packet for directions

• RelationshipsHigher altitude = lower air pressure

Lower altitude = higher air pressure

• RelationshipsDeeper under water = higher water pressure

Shallow water = lower water pressure

• Thermal ExpansionDEF: A substance increase in size as temperature increasesIt will decrease in size as the temperature decreases

• Thermometers As temp rises, fluid takes up more spaceHot Air BalloonsAs temp rises, air less dense, Hot Air Balloon moves upwardBridge JointsAs road expands, would push up if no place to go

• Thermal expansion in gases is involved with 2 gas laws.Boyles LawCharles LawOff to the SMART Notebook

Less dense objects float, more dense sink, this applies to all substances.

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