Question

reflecting on the laboratory procedure
throughout the reflection, make sure you have a copy of the student guide (pdf or word) and your data table.
you tested for the presence of four different indicators by adding to the three test tubes.
if the contained the nutrient, then it would change to the s
in this lab, the only test that turned out positive was for

Explanation:

To solve this fill - in - the - blank problem related to a laboratory procedure for testing nutrients, we analyze the context of each blank:

First Blank (What is added to test tubes)

In a typical nutrient - testing lab procedure, we add indicators to the test tubes. Indicators are substances that change their properties (usually color) in the presence of specific nutrients. So the first blank should be filled with "indicators".

Second Blank (What is being tested for)

The overall goal of such a lab is to test for the presence of different nutrients in the samples (positive control, negative control, and mystery food sample). So the second blank is "nutrients".

Third Blank (What happens if nutrient is present)

If a sample contains the nutrient that the indicator is designed to detect, the indicator will show a color change. This is the fundamental principle behind using indicators in nutrient - testing experiments. So the third blank is "color changes".

Final Answers for the Blanks (in order)

1. indicators
2. nutrients
3. color changes

(Note: Since the last part of the question about which test was positive is incomplete (no data table or further description of the tests is provided), we can't answer that part. But for the fill - in - the - blanks we have answered based on the general lab procedure for nutrient testing.)

Answer:

To solve this fill - in - the - blank problem related to a laboratory procedure for testing nutrients, we analyze the context of each blank:

First Blank (What is added to test tubes)

In a typical nutrient - testing lab procedure, we add indicators to the test tubes. Indicators are substances that change their properties (usually color) in the presence of specific nutrients. So the first blank should be filled with "indicators".

Second Blank (What is being tested for)

The overall goal of such a lab is to test for the presence of different nutrients in the samples (positive control, negative control, and mystery food sample). So the second blank is "nutrients".

Third Blank (What happens if nutrient is present)

If a sample contains the nutrient that the indicator is designed to detect, the indicator will show a color change. This is the fundamental principle behind using indicators in nutrient - testing experiments. So the third blank is "color changes".

Final Answers for the Blanks (in order)

1. indicators
2. nutrients
3. color changes

(Note: Since the last part of the question about which test was positive is incomplete (no data table or further description of the tests is provided), we can't answer that part. But for the fill - in - the - blanks we have answered based on the general lab procedure for nutrient testing.)