irreversible changes

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,