Middle School Science Blog

A collection of ideas for interactive science notebooks

Archive for the ‘physical changes. chemical changes’


Physical & Chemical Change Activity

Is Humpty Dumpty falling off the wall and cracking on the ground a physical or chemical change?

I love the Far Side Cartoon with Humpty Dumpty as a giant omelet in a diner, and the caption says something like “Humpty Dumpty’s final days”. Would that be a physical or chemical change?

I usually use the Humpty Dumpty analogy when I start talking about Physical and Chemical Changes.

This following activity is one that I used last year for the first time and it worked really well. The kids were so engaged and felt really satisfied when they figured it out. They will be able to use their Foldable as a resource for this activity.

Left Side:

To prepare this lesson, I printed out the activity cards on pages 2 & 3, laminated them, and cut them apart. I placed each set of cards in a zip-top bag, one per group of 2 students.

On their desks, I have the students place the “Physical Change” card to their left and the “Chemical Change” card to their right. Now they have to sort each card into the correct column. You can do one together to demonstrate the procedures. The kids continue to sort the cards until they have all 15 lined up in the correct columns. When they are done, they raise their hand to call me over and see if their cards are in the right place.

I walk over and when they ask if they have it right, I smile and say “Nope”. (Usually there are a few in the wrong spot, no one got it on the first try last year). So now they have to evaluate what they did and figure out what is in the right spot and what is not. I usually give the kids 2 or 3 tries without any hints from me. Then I give hints like “You have 3 in the wrong spot” or “Everything in your physical change column is correct so far.” (There may be 1 or 2 in the chemical change that need to be moved over.) Or “You have to switch one from each column”, but I won’t tell them which ones.

Once they have everything correct, I push/pile up the physical change card together and give them to one lab partner and tell them to write it in their lab journal. I push/pile up the chemical change cards together and give it to the other lab partner to write in his/her lab journal. Then I tell them to switch cards so they have everything written down in both journals. We keep it top secret so their nosy neighbors don’t see their answers! =)

I love seeing the lab partners talk about where each item goes and they get into some great discussions, they try to reason with their lab partner, they compromise, sometimes they argue, etc…

Right Side:

Students will answer analysis questions and write a conclusion.

Handout:

Answers for Physical Change: cracking eggs, slicing bread, ice melting, glass breaking, boiling water, fresh lemonade, mowing the lawn.

Physical & Chemical Properties/Changes Foldable

Up to this point, in class we would have been focusing on properties of matter such as mass, volume, & density. Now we are ready to wrap up physical characteristics and go into chemical characteristics, & differentiate between physical and chemical changes.
For this activity, I used a 4 panel brochure template (Publisher) and turned it into a 4-door foldable. This will print out on 8.5 x 14 Legal paper. If you do use legal sized paper, the width of the foldable will be 7 inches and should fit in most notebooks.
This is a 4 page document: page 1 is the front (tabs) and back (glued down) of the foldable, page 2 is the inside layout, page 3 contains the cut outs that will go into the foldable, and page 4 is the teacher’s answer key.
Left Side:
Students will be given a blank foldable (photocopy 2 sided). Tell students to cut the tabs on the dotted guide lines, but not to fold yet, instead keep the paper flat and orientated correctly so when they do fold it, the words on the tabs are right side up.
Give each student a copy of page 3. The notes are not grouped together correctly so they will have to cut out each piece of information (follow dotted lines) and reassemble the notes into the correct boxes under the corresponding tabs. All the pieces will fit into the boxes. Tell the students not to glue anything down, just to do a dry run.
This is a good partnered activity, students will work together to piece the “puzzle” together. After everyone has had a chance to work through the activity, we will go over the answers as a class. Students will then glue the correct pieces in as we go over each section.
Once everything is in place, have the students fold it so that the tabs meet in the middle. Glue into notebook.
Right Side:
  • Practice determining physical and chemical characteristics
  • BrainPOP Movie: Property Changes fill in the blanks
Handouts: