Literacy: getting the students to work together and using diagrams and technical terms to identify real structures, is a very authentic activity. Giving and receiving feedback with others is also a safe way students can really engage with the content in a class situation where questions can be considered. In their future work environment, they are likely to be working with people, problem solve, discuss findings and so on, so doing this kind of activity prepares them for the real world. A really good "hands on" activity, student-led and I'm sure they could see the value in what they were doing. (Did you ask them this too?).
Numeracy: this is a good example of numeracy embedding as your learners had to use calculations to apply to a real-life scenario and report their findings in writing (more literacy embedding - did you help them with how they should write their report eg the type of language they should use, the structure of the report). Did the class get the chance to work together and did they read each others' reports? Sometimes I give my class a model report - this could even be one that a student has written but that depends on my class dynamics.
Look forward to hearing from some of you others about how you weave in literacy and numeracy focus activities. This is part of Unit 5 on the moodle academic induction moodle site.