Question

Classify the following changes in physical changes and chemical changes:

a) Dissolving salt in water:
b) Ripening of a pear:
c) Turn on the light:
d) Frying egg:
e) Mixing sand and water:
f) Combustión of butane:
g) Iron oxidation:
h) Animal digestion:
i) Breaking a wine glass:
j) Throwing a stone:
k) Animal respiracion:
l) Chopping wood:

Answer 1

Respuesta:

a) Dissolving salt in water: physical changes 

b) Ripening of a pear: chemical changes 

c) Turn on the light: physical changes 

d) Frying egg: chemical changes 

e) Mixing sand and water: physical changes 

f) Combustión of butane: chemical changes 

g) Iron oxidation: chemical changes 

h) Animal digestion: chemical changes 

i) Breaking a wine glass: physical changes 

j) Throwing a stone: physical changes 

k) Animal respiracion: chemical changes 

l) Chopping wood: physical changes