Share Properties of matter, Physical & Chemical Change
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Three evidence that chemical reactions have taken place are....
A gas being produced, a change in colour, a change in temperature
In photosynthesize, water and carbon dioxide react and produce oxygen and glucose. The reactants on the reaction are....
water and carbon dioxide
when we burn a paper, the white colour turn to black. It is an example of chemical changes because....
the colour change / new substance (ashes) formed
in a glass of salt water, ... is solute and ... is solvent.
SALT is solute, WATER is solvent
in the lower temperature of solvent, the solute will dissolve faster. Is the statement true or false?
false
The picture shows ..(chemical/ physical).. changes that ..(reversible/ irreversible)..
physical, irreversible
