CHEMICAL
TESTS
Lesson 1: Thinking About Chemicals
What I Know About Chemicals
• “Jot Thoughts” Write
what you know about
chemicals on a sticky
note. Write one idea per
page.
• Share your ideas with
your group.
• Create a class chart.
Lesson 1: Thinking About Chemicals
What I Would Like to Know About
Chemicals
• In your journal, make a list of questions or
“things” you would like to know about
chemicals.
• Share your questions with the members of
your group.
• Create a class chart of questions.
Lesson 1: Thinking About Chemicals
Safety Rules
Do not taste any chemicals in
science class.
Report all spills to teachers
immediately.
Wear your goggles at all times
during science experiments.
Follow directions carefully.
Remember the right to smell
things: use a wafting motion with
your hand.
Do not stir up dust.
Tie back long hair and roll up
long sleeves.
Be careful with your pails.
Replace all materials properly.
Safety Contract p.20
If you or anyone else gets any of
the liquids or powders in their eyes,
nose, or mouth, tell your teacher
right away.
Wear your lab coats during
science class.
Complete all science notebook
entries.
Touch chemicals the proper way: put
a small amount between your fingers
and hold it over or on the tray.
NEVER touch an unknown chemical
without permission.
Lesson 1: Thinking About Chemicals
Mystery Powder
Use your Senses to learn about the
“Mystery Powder.”
Record your observations in your journal.
Lesson 1: Thinking About Chemicals
Water and the “Mystery Powder”
• Add water to the “Mystery Bag.” (30ml)
• Record your observations when water is
added to the bag.
• Record what you think the “Mystery Powder”
is.
Lesson 1: Thinking About Chemicals
What Would You DO?
A label is peeled off a container of white
powder in your kitchen. Describe some
ways you could find out what the
powder is.
Lesson 3: Exploring the Five Unknowns
Exploring The Five Unknowns
Use your observation skills to describe the physical
properties of the unknowns.
HOW CAN WE ORGANIZE OUR OBSERVATIONS?
Lesson 3: Exploring the Five Unknowns
Class Properties Table
Unknown
RED
YELLOW
GREEN
BLUE
ORANGE
How It
Looks
How It
Smells
How It
Feels
Other
Observations
Lesson 3: Exploring the Five Unknowns
Exploring The Five Unknowns
Turn to page 15 in your Student Book for
Instructions.
Lesson 3: Exploring the Five Unknowns
How Might You Use These?
Lesson 3: Exploring the Five Unknowns
Vocabulary
Physical properties
Hand lens
Solids
Streak Test
ADD these words to your GLOSSARY. Discuss
the meanings with your partners. Next, write
a definition for each word.
Lesson 4: Testing Unknown Solids With Water
How Are We Finding Out About the
Unknowns?
• Observation
• Add Water
Lesson 4: Testing Unknown Solids With Water
Testing With Water
Record in your notebook what you think will
happen to each of the unknowns if you mix
them with a few drops of water.
Blue
Orange
Green
Yellow
Red
Lesson 4: Testing Unknown Solids With Water
Testing With Water
• Read page 20 in your student book for
instructions on how to conduct the water test.
• Record all observations on record sheet 4-A.
Write “WATER” in test type.
• Create a class chart.
Lesson 4: Testing Unknown Solids With Water
Class Prediction Table
Unknown What We Think It Is
RED
YELLOW
GREEN
BLUE
ORANGE
In your journal , write what you think each unknown is.
Lesson 4: Testing Unknown Solids With Water
Vocabulary
Mixture
Dissolve
Liquids
ADD these words to your GLOSSARY. Discuss
the meanings with your partners. Next, write
a definition for each word.
Lesson 5: Exploring Water Mixtures
Exploring Water Mixtures
• What do you think would happen if we mixed the
mystery powders with more than six drops of
water? (record your predictions in your journal)
• Get out record sheet 4-A and label the test as
“Water Mixture.”
• Turn to page 25 in your student book for
directions for completing the water mixture test.
• Record your results on record sheet 4-A.
• Create a Class Chart.
Lesson 5: Exploring Water Mixtures
Filtering Water Mixtures
• How do you think the unknowns can be
separated from the water?
• Turn to page 27 in your student book for
instructions on filtering the water mixtures.
• Discuss mixture results 4-A.
Lesson 5: Exploring Water Mixtures
Vocabulary
Solution
Insoluble
Petri Dish
Suspension
Filtration
Soluble
Control
ADD these words to your GLOSSARY. Discuss
the meanings with your partners. Next, write
a definition for each word.
Lesson 6: Discovering Crystals
Discovering Crystals
Class Filtration Results
Unknown
RED
YELLOW
GREEN
BLUE
ORANGE
What Happened
Lesson 6: Discovering Crystals
Class Filtration Results
• Observe the petri dish and filter for each unknown
with your shoulder partner.
• Record your results for each unknown on the
filtration results table in your notebook.
• Compare your results with those of your face
partners.
Do your results match?
What happened after filtration?
Are you surprised by anything?
• Complete a class chart.
Lesson 6: Discovering Crystals
“A World of Crystals”
• Read the story “A World of Crystals” pages 3233 in your student book.
• In your notebook list three things you
discovered reading the story.
Lesson 6: Discovering Crystals
Vocabulary
Crystals
Evaporation
ADD these words to your GLOSSARY.
Discuss the meanings with your partners.
Next, write a definition for each word.
Lesson 7: Testing Unknown Solids with Vinegar
Vinegar Test
VVinegar
• What do you know about vinegar?
• Predict what your think might happen if you
add a few drops of vinegar to the unknowns.
Write your predictions in your notebook.
• Write Vinegar Test on record sheet 7-A.
• Turn to page 37 in your student book. Read
the directions.
• Record the answers to question 4 on 7-A.
• Create a class chart of your results.
Lesson 7: Testing Unknown Solids with Vinegar
Vocabulary
chemical properties
reaction
control
ADD these words to your GLOSSARY.
Discuss the meanings with your partners.
Next, write a definition for each word.
Lesson 8: Testing Unknown Solids with Iodine
Iodine Test
Iodine
• What do you know about iodine?
• What do you predict will happen if we add
iodine to the unknowns? Record your
prediction in your notebook.
• Write Iodine test on record sheet 7-A.
• Use page 37 in the student book and follow
the same procedures used in the vinegar test.
• Record the answers to question 4 on 7-A.
• Create a class chart.
Lesson 9: Testing Unknown Solids with Red Cabbage Juice
Red Cabbage Juice Test
Red
Cabbage
Juice
• What do you know about red cabbage or red
cabbage juice?
• What do you predict might happen if you add red
cabbage juice to the unknowns?
• Write Red Cabbage Juice test on 9-A.
• Refer to page 37 and follow the same directions
used in the vinegar and iodine tests(count to 15
before recording observations).
• Record the answers to question 4 on 9-A.
• Create a class chart.
Lesson 10: Testing Unknown Solids with Heat
Heat Test
• What has happened when you have watched materials
being heated on a kitchen stove or over a campfire?
• What do you predict might happen if you heat the
unknowns?
• Write Heat test on 9-A.
• Read pages 49-50 in your student book.
• As you complete your observations think about…..
What did you observe about the unknown when it was heated?
What do you observe about the unknown after it has cooled?
In what ways did the unknown change as a result of heating?
•
Create a Class chart
Lesson 11: Reviewing the Evidence
Reviewing the Evidence
• Create a Test Summary Table by combining
record sheets 4-A, 7-A, and 9-A.
• Turn to page 52 in your student book and read
the directions to yourself (do not begin
cutting).
• Watch the teacher demonstration.
Lesson 12: Identifying the Unknown Solids
Identifying The Unknowns
Use your Test Summary Table to solve the
riddles on the Chemical Information Sheet.
Lesson 12: Identifying the Unknown Solids
“Chemicals Are All Around Us”
• Read the story.
• Name two uses for each of the unknown
chemicals.
• Organize your thoughts like a scientist.
Vocabulary
Evidence
Interpret Data
ADD these words to your GLOSSARY.
Discuss the meanings with your partners.
Next, write a definition for each word.
Lesson 13: Identifying the “Mystery Bag Chemical”
Mystery Goo!!!
• How have you found out about the unknowns?
• In this activity you will conduct tests to find out the
name of the “Mystery Powder” from our fist lesson. It
IS one of the five powders.
• You and your partner will decide which tests you would
like to conduct to help you identify the “goo.”
• Write what you think the “goo” is and why you think
what you do.
• Use record sheet 13-A to record your observations .
Follow the instructions on page 59 of your student
book.
Lesson 14: Testing Mixtures of Two Unknown Solids
Testing Two Unknowns
B
A
C
•
Can you discover the contents of both
of the powders in the container you have?
• Use record sheet 13-A and page 59 in your
student book.
GOOD LUCK!!!
B
A
C
Lesson 15:Testing Household Liquids with Red Cabbage Juice
Testing Household Liquids
Lemon Juice
Ammonia
Detergent
Alcohol
Water
Vinegar
Today we will test these liquids with red cabbage
juice. What do you think will happen? Record
your ideas in your notebook.
Instructions for this test are on page 68 of your
student book. Record your responses on record
sheet 15-A.
Discuss what happened.
Lesson 15:Testing Household Liquids with Red Cabbage Juice
Acids, Bases, and Neutrals
• Red Cabbage is a natural indicator…this means
that it reveals the presence of certain
chemicals in a substance. It can be used to
determine if substances are acids, bases, or
neutrals.
Acids turn red cabbage juice a pink - purple color.
Bases turn red cabbage juice a blue – green color.
Neutrals do NOT undergo a color change.
Lesson 15:Testing Household Liquids with Red Cabbage Juice
pH Scale
The pH scale is used to help us know how
weak or strong acids and bases are.
0
1
Acids
0-6
Lemon Juice
Vinegar
2
3
4
5
6
7
8
Neutrals
7
Water
Alcohol
9
10
11
12
13
14
Bases
8-14
Detergent
Ammonia
Lesson 15:Testing Household Liquids with Red Cabbage Juice
The Case of the Disappearing
Stomachache
• Read this selection with your face partner.
• Discuss why a stomachache stops hurting
when you take medicine.
• What do you think will happen if you put
baking soda on a bee sting?
Lesson 15:Testing Household Liquids with Red Cabbage Juice
Vocabulary
Acid
Base
Neutral
indicator
ADD these words to your GLOSSARY.
Discuss the meanings with your partners.
Next, write a definition for each word.
Lesson 16: Using the Known Solids to Identify Unknown Liquids
Unknown Liquids
A
C
B
Can you identity the mystery liquids?
Select tests to help you identify the unknowns. Record
your results on record sheet 16-A.
Assessment
•
•
•
•
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Group Work
Daily Activities
Science Notebooks
Reading Stories
Teacher Made