Question

Question was provided via image upload.

Explanation:

Observe the streak colors

The first image shows a yellow-brown streak labeled "limonite". The second image shows Mary and Jim's sample streak, which displays a similar yellow-brown color.

Compare the test results

Using the Designing Experiments concept, we compare the experimental sample's streak directly to the known control sample (limonite). Both streaks exhibit a matching yellow-brown color.

Formulate a conclusion

Since the streak color of the unknown sample matches the characteristic yellow-brown streak of limonite, we can conclude that the tested rock sample likely contains limonite.

Answer:

Observation: Both the reference limonite sample and Mary and Jim's sample produce a very similar yellow-brown streak on the streak plate.

Conclusion: Since the streak colors match, we can conclude that Mary and Jim's rock sample likely contains the mineral limonite.