- New Version
- Acids & Bases Google Slides (Public)
- Handout – print pages 3 & 4 or page 5 Acids & Bases Venn Diagram pdf
- Glue & scissors if using as cut ‘n paste activity
- Optional – red & blue colored pens or pencils
- Older Versions
- Acids & Bases Venn Diagram worksheet (pdf)
- SmartBoard file download (link)
This is a fun activity to get students thinking about the properties of acids and bases based on their prior knowledge. Then using what they know, can they figure out the rest of the properties?
I like to do this activity as a friendly competition and see how many each pair of students can answer correctly. Before the students place items into the Venn diagram, I ask them to look at the properties and write a red “A” next to the property if they think it belongs to an acid, a blue “B” if they think it belongs to bases, and “AB” if it belongs to both categories.
Once they have completed categorizing the properties on their own, have each student share their answers with their seat partner. What was the same? What was different? Have them discuss their reasoning for each answer and try to come to a consensus. (You can add an additional step by asking partners to compare answers with another set of partners.) When they are ready, reveal each answer, one at a time, and discuss. Students will write (or glue in) each property into the Venn diagram.
Please click on the tags below to find additional lessons on Acids, Bases, and pH.
- Physical and Chemical Changes Sorting Worksheet & Cards (pdf)
- Laminate and cut cards apart, place in zip-top bags
- Answers for Physical Change are: cracking eggs, slicing bread, ice melting, glass breaking, boiling water, fresh lemonade, mowing lawn (cutting the grass)
- Optional – privacy screen made of one manila folder cut in half and stapled together
View my Properties of Matter resources for related lessons (page)
This is a fun partner activity that I use as part of my Chemistry unit to get students thinking about the differences between physical and chemical changes. Each pair of students is given a set of cards with images and descriptions of either a physical change or a chemical change. (see photo above)
Each pair goes through the cards and discusses/decides where the each card will be placed. Once they have categorized the cards, students call me over verify their work – I will either say “Yes, they are all in the correct category!” or “Not quite yet, try again.” I give a small clue each time I come over. For example, I will say something along the lines of “You have 2 in the incorrect column” or “You have too many in the Physical Change category, which ones should be moved to the Chemical Change category?” or “Two cards need to be flip/flopped to the other category, all the other cards have been placed correctly” or “All of the cards that are placed in the Chemical Change group belong there, but not all of them are there quite yet, what else can you move to that category?” – I won’t tell them the specifics of what needs to be changed. This forces the students to re-evaluate their choices and make changes as needed until all of their cards in the correct category.
Every few minutes, I will give the whole class a clue. This allows them to check their progress and verify one answer at a time. One card that many students have difficulty with is the boiling water card – and that is usually the first clue I will give out once I have had a chance to check every group’s progress. Each pair of students continues working together until all the cards are placed in the correct category. Once I’ve verified their placements, they add the answers to their notes and answer the questions for the activity and we discuss our results.