Card sort of Food tests and tests for gases Chemistry and Biology card sort

I wanted a resource that would challenge my students to REALLY think about the various food tests and how they fit together, as well as which chemicals are used. This resource also incorporates the chemistry side of testing for gases, what to use, how it works, etc.
I couldn't find one to suit what I needed, so I made this.

This card sort encourages students to really think about reagents used in food tests as well as what the colour changes and the results will be.

The items covered in the card sort are:
Test for reducing sugars
Test for starch
Test for proteins
Test for fats
Test for carbon dioxide
Test for hydrogen
Test for oxygen
Test for an alkene
Test for chlorine
Test for ammonia
Test for water (both of them)

The boxes are all the same size, so students cannot find answers due to the size of the box.
I have included a second document with the answers - so that you can accurately assess students with a glance.

Give each student a copy of the '4 on one page' to cut up and stick in book, or laminate and use as a starter/plenary in groups.

If you can think of any other "test for" - feed back to me in the comments and I will happily add/edit my resource. Thank you!