chemical tests
DESCRIPTION
CHEMICAL TESTS. Lori Mitchell. ICEBREAKER. Using the half sheet of paper, write down 3 words or phrases describing physical properties about yourself (hair color,etc) 3 words or phrases about your clothing. 1 unique statement about yourself. Hand in your papers to me when finished. - PowerPoint PPT PresentationTRANSCRIPT
CHEMICAL TESTS
Lori Mitchell
ICEBREAKER
• Using the half sheet of paper, write down
• 3 words or phrases describing physical properties about yourself (hair color,etc)
• 3 words or phrases about your clothing.
• 1 unique statement about yourself.
• Hand in your papers to me when finished.
KWL CHARTS
• Think about what you know about chemicals
• Think about what you want to know about chemicals
• We will add later what we learn about chemicals.
TABLE OF CONTENTS
• Date KWL p.
• Vocabulary p.
CHEMICALS
• Where have you seen or what have you heard about chemicals?
• What are some uses of chemicals?
• How have you used chemicals?
• You will now observe a common chemical.
MATERIALS
• 1 tray
• 1 mystery bag of unknown chemical
• 2 paper towels
• 4 pairs of goggles
Add Mystery Goo to the table of contents
• Question: What is the mystery chemical?
• Hypothesis: I think the mystery chemical is______because_________.
• Procedure: Observe the chemical in the bag carefully.
• Record your observations.
• What could you do to observe it even better?
OPEN THE BAG
• Touch it using only one finger.
• How could you describe it?
• Now smell it by wafting.
• Did it smell?
• Record your results.
• What senses have you used?
VOCABULARY
• Property: Characteristics used to describe an object.
• Chemical:
• Senses:
• Waft:
WHAT ELSE CAN WE DO
• Slowly pour the water into the bag.
• Carefully, knead the bag
• What new properties of the chemical did you discover?
• What do you think caused the changes in the chemical?
• Return your trays to the material center.
THE STATES OF MATTER ARE…BY: Perry Manning
They’re changing when you heat um
Sometimes you hardly see um
The heat just seems to free um
The states of matter are
DA DA DA DUM
SOLIDSDA DA DA DUM
LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM
GASES
Solids packed so tightly
They don’t weigh in so lightly
Their shape is always rightly
The states of matter are
DA DA DA DUM
SOLIDSDA DA DA DUM
LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM
GASES
Liquids pour so freely
They’re melted and so feely
They freeze when it’s cold, really
The states of matter are..
DA DA DA DUM
SOLIDSDA DA DA DUM
LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM
GASES
Gases are unshapely
They always seem escapely
Their volume changes dately
The states of matter are
DA DA DA DUM
SOLIDSDA DA DA DUM
LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM
GASES
So you see they’re really easy
Calm down don’t get so weazy
We know this song is measly
The states of matter are
DA DA DA DUM
SOLIDSDA DA DA DUM
LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM
GASES
FILLING THE CONTAINERS
• Put on your goggles we are working with chemicals.
• FOLLOW THE PROCEDURES FOR FILLING UP YOUR JARS.
TABLE OF CONTENTS
• Date Vocabulary p.
• Date KWL p.
• Date Mystery Chemical p.
• Date Properties Table p.
EXPLORING THE PHYSICAL PROPERTIES OF OUR UNKNOWNS
• Materials:• Science pail• 2 hand lenses• 2 pieces of black construction paper• 1 tray• 1 test mat• Sheet of wax paper• 5 toothpicks• 2 paper towels
Reflections
• Why would you think it might be important to record your observations?
• How could organizing your information help you solve the mystery of the five unknowns?
WATER TESTS
UNKNOWN 6 drop test More water
RED
YELLOW
GREEN
BLUE
ORANGE
VOCABULARY
• Mixture: a combination of two or more different substances
• Dissolves: when a material is spread evenly throughout another substance.
Exploring Water Mixtures
• What do you think would happen if we add more water to the chemical?
• VOCABULARY
• Solution: is a homogeneous mixture. Its components are uniformly mixed.
• Suspension: is a heterogeneous mixture. Its components are not uniformly mixed throughout, you can still see them.
Materials
• Pail• Tray• 5 cups• 10 colored dots• 1 plastic dropper• 2 paper towels• Wax paper• 5 evaporation dishes• 5 coffee filters
WATER TESTS
UNKNOWN 6 drop test More water
RED
YELLOW
GREEN
BLUE
ORANGE
DISCOVERING CRYSTALS
• VOCABULARYCrystal: a solid substance with a regular geometric pattern
• Evaporation: the process by which a liquid changes into a gas.
FILTRATION/EVAPORATION
UNKNOWN Filters Dishes
RED
YELLOW
GREEN
BLUE
ORANGE
• What happened to the mixtures after filtration?
• Are your team’s results similar to those of the other team?
• If not, why do you think
• Which results surprised you?
• Write your surprises as a reflection in your science notebook.
Read “A WORLD OF CRYSTALS”
ALSO READTWO BAD ANTS
By Chris Van Allsburg
VINEGAR TEST
• MATERIALS: • Pail• Dropper of vinegar• Tray• Test mat• Wax paper• 5 toothpicks• Paper towel
Vinegar test
• We will do this experiment just like the water drop test.
• Record results on Record sheet 7-A
• Vocabulary
• Chemical Property: its ability to transform into new materials.
• Control: an unchanged bsis of comparison to make observations
VINEGAR TEST
UNKNOWN Vinegar Test
RED
YELLOW
GREEN
BLUE
ORANGE
VINEGAR TEST
• How did the vinegar react with each unknown?• In what ways were the reactions similar?
different?• How did the untested samples in the compare
circle help you describe yur observations?• How were the vinegar test results similar to
those of the water test?• Different• How did your predictions compare with your
results?
IODINE
• Question: What do you think will happen to each chemical when we add 6 drops of iodine?
• Hypothesis: If I add iodine to my chemicals I think
• Red:• Yellow:• Green:• Blue:• Orange:
IODINE TEST
• Procedure: Follow the same procedure as the 6 drop vinegar test
• Results: See chart
• Conclusion: The most unusual thing that happened with iodine was…..
• Review your tests
IODINE TEST
UNKNOWN Vinegar Test Iodine Test
RED
YELLOW
GREEN
BLUE
ORANGE
HEAT TEST
• What do you think would happen if we add heat to the chemicals?
• SAFETY ALERTWEAR YOUR GOGGLESTIE BACK LONG HAIRROLL UP SLEEVESWORKSPACE SHOULD BE PAPER FREE.
HEAT TEST
UNKNOWN Red CabbageTest
HEAT TEST
RED
YELLOW
GREEN
BLUE
ORANGE
HEAT
• What did you observe when heat was added to the chemical?
• What did you observe about the unknown after it cooled?
• What did you learn from adding heat that you didn’t adding liquids?
