7.PS.2: Matter can be separated or changed, but in a closed system, the…
Matter can be separated or changed, but in a closed system, the number and types of atoms remains constant.
The Ohio's Learning Standards for Science (2018) outcome 7.PS.2 (Physical Science) for Grade 7 says: “Matter can be separated or changed, but in a closed system, the number and types of atoms remains constant.” This Fieldbook unit teaches it hands-on, with everyday materials and a printable teacher guide and student sheet for every lesson. Official wording: Ohio's Learning Standards for Science (2018).
Kitchen Chemistry Grades 7–8 · partly supports this outcome
Fizzing, curdling and colour changes with things from the grocery store. Students gather evidence of new substances, weigh a reaction in a sealed bottle, and turn red cabbage into an acid detector.
- Where does the mass go? 50–60 min
Teams weigh baking soda and vinegar reacting in an open cup, then in a capped pop bottle. The open cup gets lighter and the capped bottle doesn't, until they open it. Students use atoms to explain why mass is never lost in a reaction, only let out.
Printable practice for 7.PS.2
These pages practise a closely related idea; the match to 7.PS.2 is partial.
- Kitchen Chemistry workbook included with the unit
1 word wall, 1 English-support page, 1 practice page, 1 reading, 1 unit review, 1 unit test, with answer keys.
Need just this outcome? Build a custom pack from these pages, with its answer key, in about a minute. Custom packs come with All-access and school licences.
Compared with NGSS: MS-PS1-5 (partial).
Every unit matched to Ohio's curriculum · All places and curricula
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