Page 22 - E-Science Prim.5 2025 U2. _Neat
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Physical Chemical
change change
A change in the matter A change in matter with a change
appearance without any in its structure producing new
change in its structure. matter.
Reversible as: Melting X freezing Burning paper to form ash.
Evaporation X condensation Strike a match.
(Change the state of matter)
you feel heat and see light.
Cutting paper Oxygen + carbon + hydrogen
(Change in size)
release heat start a fire
Coiling a straight wire to form a Food digestion
spring.
Mixing flour, water, sugar and yeast
(Change in shape) then baking them.
Coloring a paper Cake taste differs than the ingredients.
Adding an ink in a cup of water. Mixing vinegar with baking
soda (Forming gas bubbles)
(Expected change in color) Rusting of metals
Iron + Oxygen + Water
Making salad = iron oxide
lose their shining
Mixing iodine + cornstarch
(Forming new substance dark blue)
Leaving the milk 2 days outside
(Forming strong bad odor)
First Term 106
