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 DateKWLp. Vocabularyp.

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 SOLIDS DA DA DA DUM LIQUIDS DA DA DA DUM DA DA DA DUM DA 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 SOLIDS DA DA DA DUM LIQUIDS DA DA DA DUM DA DA DA DUM DA 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 SOLIDS DA DA DA DUM LIQUIDS DA DA DA DUM DA DA DA DUM DA DA DA DUM GASES

Gases are unshapely They always seem escapely Their volume changes dately The states of matter are

DA DA DA DUM SOLIDS DA DA DA DUM LIQUIDS DA DA DA DUM DA DA DA DUM DA 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 SOLIDS DA DA DA DUM LIQUIDS DA DA DA DUM DA DA DA DUM DA 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 DateVocabularyp. DateKWL 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 UNKNOWN6 drop testMore 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 UNKNOWN6 drop testMore water RED YELLOW GREEN BLUE ORANGE

DISCOVERING CRYSTALS VOCABULARY Crystal: a solid substance with a regular geometric pattern Evaporation: the process by which a liquid changes into a gas.

FILTRATION/EVAPORATION UNKNOWNFiltersDishes 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 READ TWO 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 UNKNOWNVinegar 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 UNKNOWNVinegar TestIodine Test RED YELLOW GREEN BLUE ORANGE

HEAT TEST What do you think would happen if we add heat to the chemicals? SAFETY ALERT WEAR YOUR GOGGLES TIE BACK LONG HAIR ROLL UP SLEEVES WORKSPACE 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?