ict video lesson plan b. ed (2)
TRANSCRIPT
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WELCOME
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CHANGES
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CHANGES TAKING PLACE AROUND US
DAY AND NIGHT CHANGESMILK BECOMES CURDDECAY OF VEGETABLESRUSTING OF IRONRAININGSUN RISES
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CHANGE IN PHYSICAL STATES
MELTING OF ICE BOILING OF WATER
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Discussion points
• WHAT DO YOU OBSERVE IN THE PHYSICAL STATES?
• DID THEY CHANGE?• WHAT DO YOU UNDERSTAND?
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SOLID STATE CHANGES TO LIQUID STATE IN THE FIRST CASE.
IN THE SECOND CASE LIQUID CHANGES TO GASEOUS STATE
IN BOTH THE CASES THERE OCCURS
A PHYSICAL CHANGE
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Discussion points
• WHAT HAPPENS WHEN AN IRON NAIL IS LEFT AS SUCH FOR LONG TIME?
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Here Chemical Change Occurred.IRON RUSTS
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CLASSIFY THESE INTO PHYSICAL AND CHEMICAL CHANGES
MELTING OF WAXEVAPORATION OF WATERCRACKING OF FIREWORKSDIGESTION OF FOODBURNING OF FIREWOODCONVERSION OF RICE TO BOILED
RICERUSTING OF IRON
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PHYSICAL AND CHEMICAL CHANGES
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ACTIVITY
• WHEN A TEASPOONFUL OF SALT IN WATER IS DISSOLVED,COMMON SALT SOLUTION IS FORMED.
IS THERE ANY FORMATION OF NEW
SUBSTANCES?
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NEW SUBSTANCES ARE FORMED IN CHEMICAL
CHANGES
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BURNING OF CANDLEBURNING OF WICK AND GASEOUS WAX IS AN EXAMPLE OF PHYSICAL CHANGE.
NO NEW SUBSTANCES ARE FORMED IN PHYSICAL CHANGES
• CHEMICAL CHANGE
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REVIEWDifferentiate Between Physical
and Chemical Changes
FOLLOW UP ACTIVITYLIST OUT 10 EXAMPLES FROM EACH OF
PHYSICAL AND CHEMICAL CHANGES
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THANKYOU