This is the free version of an assessment for students who are studying weathering, erosion, acid rain, how concentration of an acid affects reactions, measuring rate of reaction.

This investigation focuses on how the concentration of acid affects the mass change of a calcium carbonate rock.

I have also produced a full resource pack available to purchase from TES at
/teaching-resource/weathering-of-limestone-investigation-quality-mark-assessment-full-resource-pack-11606287

This FULL resource pack comes with several parts;
1. PowerPoint presentation to introduce the task.

2. Word document printout for the students to stick in their books.

3. Word document printout with a level ladder on so that the students can self/peer assess the work.

4. Excel spreadsheet that can be used to automatically generate extended written feedback including improvement strategies for the teacher to give the students.
A guide on how to use this resource can be freely accessed at
/teaching-resource/the-automarker-11191496