REED COLLEGE SCIENCE OUTREACH PROPERTIES OF MATTER

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Vinegar Test Procedure:
Step 1: Put a small scoop of powder
into a well.
Step 2: Add ¼ tsp of vinegar.
Step 3: Stir with a toothpick.
Step 4: What happens?
(watch for bubbles)
Iodine Test Procedure:
Step 1: Put a small scoop of powder
into a well.
Step 2: Add ¼ tsp of iodine solution.
Step 3: Stir with a toothpick.
Step 4: What happens? (watch for
color changes)
Cabbage Test Procedure:
Step 1: Put a small scoop of powder into a well.
Step 2: Add ¼ tsp of cabbage juice.
Step 3: Stir with a toothpick.
Step 4: What happens? (watch for color changes)
10. Tell the students that their
group will now work together
to test the remaining powders in
the same way. (Depending on
how quickly you believe your
students can work, you might
suggest that the group splits the
powders up and works in pairs
to make sure that they finish
testing all the powders).
11. Once the students have finished collecting their data, have the students clean up
their workstation. All the powders and testing solutions can be rinsed down the drain.
(If any groups finish quickly, you could give them additional powders to test before
having them clean up).
12. Pass out the powder identification chart to groups who have finished collecting data
and cleaned up. Have the students compare their data to the properties of each possible
powder in order to try to identify each vial.
13. Once the students have made their identifications, check their answers with the
Reedie answer sheet.
Wrap-up (10-15 Minutes):
14. Once the entire class has finished and cleaned up, ask the students what reasoning
they used to identify the powders. What powders were easy to identify? Which were
difficult to identify?
15. Today students will take a end of the year survey to give us feedback on which
lessons they enjoyed the most this semester. Remind students that there are no right or
wrong answers and that we just want to know what they think. You might want to
briefly review what we did in each lesson to help jog their memories. Give the students
5-10 minutes to fill them out, and then collect them. Be sure to return them to Kristy!
Note: There will also be a separate survey for the classroom teacher to complete as well.
16. Finally, give stickers to students for completed worksheets and be sure to check the
Question Box and then say goodbye to your students!