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Sadia M Science 8th grade Englisch 13 Karten

Karten in diesem Stapel (13)

17 . 1Hi :)
2Physical ChangesThe changes where no new substances are formed.
3Chemical changesThe changes where new substances are formed.
4ExpansionWhen volume of an object increases and its density decreases.
5Contraction(The opposite of expansion)
When the volume of an object decreases.
6EvaporationThe process of turning liquid into gas (vapour).
7MeltingThe process of turning solid into liquid.
8CondensationThe process of turning gas into liquid.
9Freezing (solidification)The process of turning liquid into solid
10PrecipitateAn event or situation that is undesirable.
11what is :- solute solvent solution?Solute : the solid that is been dissolved.
Solvent : the dissolving liquid.
Solution : the mixture that is formed.
12CrystallisationIf the solvent is removed by evaporation, the solute particles can join together and form crystal.
This process is known as crystallisation.
13How can you detect a chemical change?The presence of a new substance can be detected by:
1. seeing a new colour
2. smelling a gas or seeing bubbles
3. seeing a new solid forming in a clear solution
4. seeing or feeling a change in temperature.