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Module 1 Answers CHE140
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CHE140 Module 1 Questions and Answers
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Stephanie Hamilton 32899907 CHE140 – Module 1MATTER
1. Matter is defned as anytthins that occccupies spacce and has mass. Some matter is
visible, for example; water, wood and plastcc and some matter is not visible, for
example; miccrosccopicc dust.
2. Matter is ccomposed of atoms and these atoms are bonded tosether to form
moleccules.
3. The three states of matter are solid, liquid and sas.
4. In solid matter, atoms or moleccules pacck ccloselyt tosether and have a fxed shape. For
example; a cchair.
5. Crytstalline matter is atoms or moleccules beins arransed in seometricc patterns with
lons-ranse, repeatns order, for example; salt. Amorphous matter atoms and
moleccules do not have lons-ranse order, for example; slass.
6. In liquid matter, atoms or moleccules are cclose to eacch other but are free to move
around, sivins the substancce fuidityt. For example; water.
7. In saseous matter, atoms or moleccules are separated byt larse distancces and are free
to move more relatve to one another. For example; oxytsen.
8. Gases are ccompressible beccause the atoms and moleccules that ccompose sases are
not in ccontacct with eacch other.
9. Mixtures are the most ccommon form of matter we enccounter dailyt and ccontain
several diferent substancces with proportons that varyt from one substancce to
another. For example; soil and apple juicce.
10. A homosenous mixture is a mixture where the ccompositon is the same throushout,
for example; salt water. A heterosenous mixture is a mixture where the ccompositon
varies, for example: oil and water.
11. Pure substancces are ccomposed of onlyt one atom or moleccule and ccan then be
divided into two tytpes; elements and ccompounds.
12. An element is a pure substancce and ccannot be broken down into smaller parts. For
example; ccopper. A ccompound is a pure substancce and is ccomprised of two or more
elements in fxed and defnite proportons. A ccompound ccan be broken down into
smaller parts. For example, aluminium oxide.
13. A mixture is ccomprised of two or more pure substancces, but a new substancce is not
formed. A ccompound is ccomprised of two or more elements and a new substancce is
formed.
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