CHEMICAL TESTS

1. CHEMICAL TESTS Lori Mitchell

2. 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.

6. 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.

7. TABLE OF CONTENTS • Date KWL p. • Vocabulary p.

8. 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.

9. MATERIALS • 1 tray • 1 mystery bag of unknown chemical • 2 paper towels • 4 pairs of goggles

10. 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?

11. 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?

12. VOCABULARY • Property: Characteristics used to describe an object. • Chemical: • Senses: • Waft:

13. 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.

14. 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

15. DA DA DA DUM SOLIDSDA DA DA DUM LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM GASES

16. Solids packed so tightly They don’t weigh in so lightly Their shape is always rightly The states of matter are

17. DA DA DA DUM SOLIDSDA DA DA DUM LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM GASES

18. Liquids pour so freely They’re melted and so feely They freeze when it’s cold, really The states of matter are..

19. DA DA DA DUM SOLIDSDA DA DA DUM LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM GASES

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

21. DA DA DA DUM SOLIDSDA DA DA DUM LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM GASES

22. 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

23. DA DA DA DUM SOLIDSDA DA DA DUM LIQUIDSDA DA DA DUMDA DA DA DUMDA DA DA DUM GASES

24. FILLING THE CONTAINERS • Put on your goggles we are working with chemicals. • FOLLOW THE PROCEDURES FOR FILLING UP YOUR JARS.

25. TABLE OF CONTENTS • Date Vocabulary p. • Date KWL p. • Date Mystery Chemical p. • Date Properties Table p.

26. 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

28. 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?

29. WATER TESTS

30. VOCABULARY • Mixture: a combination of two or more different substances • Dissolves: when a material is spread evenly throughout another substance.

31. 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.

32. Materials • Pail • Tray • 5 cups • 10 colored dots • 1 plastic dropper • 2 paper towels • Wax paper • 5 evaporation dishes • 5 coffee filters

33. WATER TESTS

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

35. FILTRATION/EVAPORATION

36. 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.

37. Read “A WORLD OF CRYSTALS” ALSO READTWO BAD ANTS By Chris Van Allsburg

38. VINEGAR TEST • MATERIALS: • Pail • Dropper of vinegar • Tray • Test mat • Wax paper • 5 toothpicks • Paper towel

39. 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

40. VINEGAR TEST

41. 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?

42. 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:

43. 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

44. IODINE TEST

45. 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.

46. HEAT TEST

47. 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?