irreversible changes
TRANSCRIPT
Group 1 - MIXINGReversible and Irreversible ChangesMaterials Prediction Reversible /
Irreversible?Observation after
mixingBicarbonate of soda + water
Bicarbonate of soda + vinegar
Soda + lemon juice
Soda + vinegar
Soda + water
Baking powder +
water
Which of the three liquids tend to dissolve the solids?
Which of the three liquids tend to react with them/makes gases?
What is the name of this type of liquid?
Why does the baking powder react differently with water?
Group 2 - BURNINGReversible and Irreversible ChangesMaterial Appearance
before burningReversible / Irreversible?
How?
Observation after burning
Reversible / Irreversible?
How?Paper
Metal
Candle
String
Wood
Plastic
Charcoal
Fabric
Group 3 - HEATINGReversible and Irreversible Changes
Material Appearance before heating
Reversible / Irreversible?
Observation after burning
Reversible / Irreversible?
How?Chocolate
Butter
Bread
Ice
Bread dough
Sugar
Wax
Salt Water
Word bank – melt, toast, burn, change colour, cook
Group 4 – Plaster of ParisReversible and Irreversible Changes
Write and draw about what happens when using Plaster of Paris?
Write and draw about what other substances that have similar properties to plaster e.g. cement, be used for?
Group 5 – BAKINGReversible and Irreversible Changes
Before leaving dough to rise
After dough is left to rise
Height
Diameter
Weight (remember to take away the weight of container from total)
Write and draw about what happened when making dough rise?
Word bank – dough, rise, risen, bake, ingredients, knead,