Page 31 - E-Science Prim.5 2025 U2. _Neat

Experiment 9
Mixing it up with Mass (1)

You have in front of you: salt, pepper, water, oil, spoons and balance.

Observation: Record the mass of each

Oil = …….. Salt = …….. Salt = ……….
Water = …….
Mixture = ….. Pepper = ………… Water = ……..

Mixture = ………. Salty water = ……….

1- The summation of their masses before mixing equals the
summation of their masses after mixing.

2- The properties of the substances don’t change after mixing.

Conclusion:

The masses of substances before mixing are equal to the masses
of these substances after mixing when their properties don’t
change.

First Term 130