Download Clay Elements Molecules and Compounds Lab Activity

Student
Name:
Date:
Period:
Clay Elements, Molecules, and Compounds
(srEM 3.0)
SC.8.P.8.5 Recognize that there are a finite number of elements and that their atoms combine in a multitude
of ways to produce compounds that make up all of the living and nonliving things that we encounter. (AA)
SC.8.P.8.9 Distinguish among mixtures (including solutions) and pure substances (Assessed as SC.8.P.8.5)
0biectives:
o
.
will model how elements combine in a multitude of ways to
produce compounds that make up all living and nonliving things.
Students will differentiate among pure substances, mixtures and solutions.
Students
Problem Statement/Research Question: How does a small set of elements combine to form molecules,
compounds and mixtures, which are used in your daily lives?
Background:
Atoms of elements combine to form molecules and compounds. Some molecules are elements not
compounds since they are only made up of only one type qf element such as hydrogen gas.
Mixtures consist of different types of elements andlor compounds that are physically blended but
not chemically bonded together.
Vocabulary:
Atoms - small particles that make up elements and compounds
Molecules - two or more atoms bonded together: these atoms may be of the same element or
different elements
Compounds - two or more different types of atoms bonded together
Mixtures - when two or more substances are physically blended but not chemically bonded
together
Materials:
Paper Towel, Toothpicks, Modeling Clay, Colored Pencils
Procedure:
1. Color the modeling clay key according to the samples of clay provided.
2.For each molecule/compound listed in the table you will
A. List the names of the atoms involved
B. Identify the number of each atom in the molecule.
need to:
C. Make the clay model
D" Color the model in the table and label the name of each atom.
E" Identify model as an element, compound or mixture.
(You need to take apart some models to make other models. But make sure you have received the
teacher's initials next to the model before you take it apart. For instance, you need to make CH4 and CO2
with the same carbon molecule.)
3. After you have completed all of the models, you must answer the questions to ensure
comprehension of the material.
ELr
2017
M-DCPS Department of Science
Student
SUBSTANCE FORMULA
ATOM
#oF
NAMES
ATOMS
MOLECULAR
MODEL
Make the clay
compound model and
ELEMENT,
COMPOUND
OR MIXTURE
color the diagram
Hydrogen
Gas
Hz
Salt (Sodium
Chloride)
NaCl
Methane
CH+
Carbon
Dioxide
COz
Oxygen Gas
Air
Oz
Nz, oz,
re-ffi
HzO, COz
:W*j
Water
HzO
Hydrochloric
Acid
HCI
Sodium
Hydroxide
(lve)
NaOH
Carbonated
Water
HzO
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COz
M-DCPS Department of Science
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Student
Post-Lab Questions:
1. What particle makes up all substances?
2. Which is larger, an atom or a molecule? Explain.
How is a compound different from a molecule?
4. Are all molecules compounds? Explain.
5. One of the properties of a pure substdhce it that they always exist in fixed proportions.
o How many hydrogen atoms are needed to form five water molecules?
J.
o
How many oxygen atoms are needed to form five water molecules?
Research Question: How does a small set of elements combine to form molecules, compounds and
mixtures, which are used in your daily lives?
Claim: (Make a statement that answers the research question, based on what you observed in the lab
you performed)
Evidence: (Support your claim by citing data you collected in your lab procedure)
Reasoning.' (Describe the science concepts that explain why or how the evidence you presented
supports your claim. Include information from observations and notes from video.)
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2017
M-DCPS Department of Science
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Student
SSA Connection:
L Which of the following is the best example of a heterogeneous mixture?
A" Lemonade made of water, lemonade powder mix, and sugar.
B. An omelet made of scrambled eggs and cheddar cheese.
C. Trail mix made of raisins, peanuts, and chocolate candies.
D. A glass of ice water made of ice cubes and pure water.
2.
Susie wants to make lemonade on a hot summer day. She mixes lemon juice, water, and sugar in
large container. Which of the following happens as she combines the ingredients?
A. They mix together to form a new compound.
B. They mix together to form a homogeneous solution.
C. The stirring motion causes them to break down into elements.
D. The heavier items will not completely dissolve, creating a suspension.
3.
Which statement
A. Silver nitrate
B. Silver nitrate
C. Silver nitrate
D. Silver nitrate
4.
best explains why silver nitrate (AgNO3) is classified as a compound?
contains a metal.
can react with copper.
forms when three elements chemically combining.
forms a solution when mixed with water.
In the following diagram, the content of each container is shown as spheres representing atoms.
Different shadings of the atoms represent different elements.
#
/.( n
L#/
I'&l-*
*
w@
qe
r:
q'#:
LO
ry
n
#wv
w- &%
NI
ry
Which of the containers has only one pure substance shown?
A. I
B. II
C. UI
D. IV
ELg
2017
M-DCPS Department of Science
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