5 th science 12.physical changes sub unit - 12.1 introduction 12.2 evaporation 12.3 condensation...

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5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

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Page 1: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

5th Science•12.Physical changes

Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

Page 2: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

•12.Physical change• -A change in which The original

Substance remains as it is and no new substances are formed is called physical change.

Page 3: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

•12.Physical changes• 1)Evaropation• 2)Condensation• 3)Dissolving• 4)Boiling• 5)Melting

Page 4: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

Evaporation Evaporation is the change of

a liquid into a vapor at a temperature below the boiling point. This occurs at any temperature between the melting point and the boiling point. However, the warmer the temperature the more quickly the water will evaporate.

Page 5: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

Condensation Condensation is the change of

a gas or vapor to a liquid, either by cooling it or by subjecting the substance to an increase in pressure. When water vapor cools in the atmosphere, it condenses into tiny drops of water which form clouds.

Page 6: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

3)Dissolving

Mixing solid substance in liquid

Page 7: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

The Process of Dissolving

Page 8: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

Boiling The boiling is the liquid

changes to a vapor or gas.

Again this is a different temperature for different substances. For water the boiling point is 100°C

Page 9: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

Melting To melt means to change a

substance from a solid to a liquid state by heating it to the melting point. Different substances melt at different temperatures. Water melts at 0°C or 32°F.

Page 10: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

Practice – Number your paper from 1 to 10.

Decide the state or phase for each item. Is it . . . • Melting• Freezing• Boiling• Evaporating• Condensing• Sublimating

Page 11: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

1. In which state is the snow?

a) Meltingb) Freezingc) Boilingd) Evaporatinge) Condensingf) Sublimating

Page 12: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

2. In which state is the puddle? (Choose 2 answers.)

a) Meltingb) Freezingc) Boilingd) Evaporatinge) Condensingf) Sublimating

Page 13: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

3. In which state is the fog?a) Meltingb) Freezingc) Boilingd) Evaporatinge) Condensingf) Sublimating

Page 14: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

4. In which state is the moisture on the bottle?

a) Meltingb) Freezingc) Boilingd) Evaporatinge) Condensingf) Sublimating

Page 15: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

5. In which state is the puddle on the road?

a) Meltingb) Freezingc) Boilingd) Evaporatinge) Condensingf) Sublimating

Page 16: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

6. In which state is the road?

a) Meltingb) Freezingc) Boilingd) Evaporatinge) Condensingf) Sublimating

Page 17: 5 th Science 12.Physical changes Sub Unit - 12.1 Introduction 12.2 Evaporation 12.3 Condensation 12.4 Dissolving 12.5 Boiling 12.6 Melting

• Reference – Text Book, Web.

Produced By – Annasaheb Kalyani Vidyalaya , Camp Satara -Panchal Amol Dattanand Hsc.Ded.