Matter and
Molecules
Review
Chapter 3 Review
Vocabulary
 In living things,
carbohydrates are broken
down into ______________
for fuel.
 Simple Sugars
Vocabulary
 Long chains of _______
make proteins.
 Amino Acids
Vocabulary
 A chemical reaction can be
represented by a
__________.
 Chemical Equation
Vocabulary
 A substance that is made up
of more than one kind of
element is called a
___________.
 Compound
Vocabulary
 Anything that takes up
space and has mass is
_________.
 Matter
Vocabulary
 The raw materials in a
chemical reaction are called
__________.
 Reactants
Vocabulary
 Cell activities in living things
are directed by
___________.
 Nucleic Acids
What’s the Difference?
 Chemical Symbol vs.
Chemical Formula
 Symbol- one- or two-letter
symbol for an element.
Formula- combination of
chemical symbols used to
represent a compound.
What’s the Difference?
 Reactant vs. Product
 Reactant- substance used
up in chemical reaction
(usually on left). Productsubstance that is produced
by a chemical reaction
(right side).
What’s the Difference?
 Amino acids vs. Nucleic
Acids
 Amino Acids- building blocks
of proteins. Nucleic Acidsmolecules that help direct
cell activities and cell
reproduction.
What the Difference?
 Mixture vs. Solution
 Mixture- two or more
compounds that do not
combine chemically.
Solution- type of mixture in
which the substances mix
evenly.
What’s the Difference?
 Element vs. Compound
 Element- basic substances
that make up matter.
Compound- substance
made up of more than one
element.
What’s the Difference
 Organic Compound vs.
Inorganic Compound
 Organic- found in living
things and generally contain
Carbon. Inorganic- generally
do not contain Carbon.
What’s the Difference?
 Atom vs. Molecule
 Atom- building blocks of
elements. Moleculesbuilding blocks of
compounds.
Check Your Knowledge
 How many types of atoms
can be contained in an
element?
 One
Check Your Knowledge
 How does your body use
proteins?
 Proteins are used to build
and repair body parts, to
speed up chemical
reactions, and to protect the
body from diseases.
Check Your Knowledge
 What is Matter?
 Matter is anything that takes
up space and has mass.
Check Your Knowledge
 Starches and sugars are
examples of what type of
organic compound?
 Carbohydrates
Check Your Knowledge
 What form of matter has
definite volume but not
definite shape?
 Liquid
Check Your Knowledge
 Name the three phases of
matter.
 Solid, Liquid, Gas
Check Your Knowledge
 What happens during a
chemical change?
 Atoms are rearranged to
form new compounds.
Check Your Knowledge
 How do chemists represent
elements?
 With one- or two-letter
symbols.
Check Your Knowledge
 What is the difference
between organic and
inorganic compounds?
 Organic contain Carbon;
inorganic don’t.
Check Your Knowledge
 Give an example of a
physical change.
 Ex. Ice melting, ripping a
piece of paper, cutting a
rubber band.
True or False?
 Molecules are made up of
atoms and are the building
blocks of elements.
 False; Compounds
True of False?
 A physical change occurs
when ice melts.
 True
True or False?
 A chemical change affects a
substance’s characteristics
but does not change its
identity.
 False; Physical Change
True of False?
 Organic compounds include
proteins, carbohydrates, and
lipids.
 True
True of False?
 In chemical equations,
chemical formulas represent
compounds.
 True
True or False?
 You balance a chemical
equation by placing letters
called coefficients in front of
the chemical formulas.
 False; Numbers
Check Your Understanding
 What is the difference
between a solid, a liquid,
and a gas?
 Solid- definite shape and
volume; particles close
together. Liquid- definite
volume. Gas- no definite
shape or volume; particles
spread out.
Check Your Understanding
 What are the three parts that
make up an atom? What are
their charges? Where are
they located?
 Protons- in nucleus; positive
charge. Neutron- in nucleus;
no charge. Electron floating
around nucleus; negative
charge.
Check Your Understanding
 What do the subscripts in a
chemical formula indicate?
 The number of atoms in a
molecule.
Check Your Understanding
 What’s the difference
between DNA and RNA?
 DNA- directs cell to perform
processes. RNA- carries
information elsewhere in
cell.
Check Your Understanding
 How many Hydrogen atoms
are in the molecule:
2C6H12O6
 24