______17.In a dispersion, which phases of matter will not form colloid?
a.Liquid to liquid
b.Liquid to solid
c.Solid to gas
d.Gas to Gas

______18.When sodium is combined with chlorine through a chemical process,what material will be formed?
a.Fats
b.Protein
c.Rain
d.Table salt

______ 19.Which of the following statements is true?
a.A mixture is categorized as an element and a compound.
b.A pure substance has a definite and constant composition.
c.A mixture contains materials that are combined chemically.
d.A pure substance is classified as homogeneous and heterogeneous.

________20.George noticed that the soil he will use for planting has other materials such as sand and dry leaves.What does this show?
a.The soil is a compound
b.The soil is a homogeneous mixture
c.The soil is a heterogeneous mixture
d.The soil is produced by elements that have chemically combined.

B.Write the term that is being described in each item.
__________1.The simplest form of matter that cannot be broken down into a simpler substance.
__________2.The part of a solution that dissolves the solute.
__________3.The scattering and reflection of light caused by the colloid particles.
__________4.Formed when hydrogen is combined with oxygen through a chemical reaction.
__________5.What the appearance of the components of a solution look like.
__________6.Has to be added to the mixture to make a diluted solution.
__________7.A type of mixture with components that are evenly distributed.
__________8.A type of air pollution produced by combining smoke and fog.
__________9.A type of solution that contains a very small amount of solute in a greater amount of solvent.
_________10.The solvent in a sugar solution.

D.Put a check (✅)on the blank if the statement is true.If false , replace it with the correct word or phrase to make the statement right.

_______1.A solution is a kind of heterogeneous mixture.
_______2.There are five types of colloid; suspension,foam,sol,gel, and aerosol.
_______3.If the solid material is dispersed in a liquid dispersing medium , it will form a/an aerosol.
_______4.Smoke is an example of a solid aerosol.
_______5.Emulsion is a combination of two liquids that are completely miscible.
_______6.Marshmallow is an example of a solid foam.
_______7.Blood is a homogeneous mixture.
_______8.An element is a combination of two or more substances that are physically combined.
_______9.When the solid particles are insoluble in liquid ,it forms a mixture called a suspension.
______10.Water is considered as a universal solvent.​