Exit Ticket: Unit 1.1→1.2 Evidence & Biomolecules (Final check)

The next check on this week's work. It covers a different skill from the last one, so this is a fresh check rather than a retake. Enter your Student ID and submit.

1. 1. To test whether a powder at a scene contains starch, the best controlled comparison includes:

   AA known starch sample tested by itselfBThe unknown powder tested three timesCA known starch sample and a starch-free sampleDEach sample tested with a different indicator

2. 2. A negative control tests positive. The indicator bottle had sat uncapped for a week. The team should:

   AOpen a fresh bottle and rerun the setBReport the positive result for the controlCIgnore the control and read the unknownsDAdd more indicator to each unknown tube

Enter your Student ID to submit.