New Mastering Science Workbook 2b Answer Chapter 9 May 2026

New Mastering Science Workbook 2B — Chapter 9 Answers

Below is a concise, well-structured answer key for Chapter 9 of "New Mastering Science Workbook 2B." Assumed topic: Living things and their environments (adaptations, food chains, habitats). Adjust if your chapter covers a different unit.

Where to Find the Official Answers

Because workbooks are copyrighted, many schools tear out the answer pages. Here is your legitimate game plan:

  1. Your Teacher’s Portal: Most schools upload answer keys to their LMS (Google Classroom, Schoology, etc.).
  2. The Publisher’s Website: Oxford University Press (common publisher for New Mastering Science) often provides instructor-only resources, but some student companion sites have partial keys.
  3. Study Groups: Cross-check your work with 2-3 classmates. If you all get the same answer, it’s likely correct.
  4. Tutor or Senior Student: Ask a Sec 3 student who kept their old answer sheets.

⚠️ Avoid shady “free PDF” sites. They often contain wrong answers (e.g., mixing up current and voltage formulas), which will hurt your exam prep. new mastering science workbook 2b answer chapter 9

2. Short answer questions

  1. What is a food chain?

    • A food chain shows the flow of energy from a producer to one or more consumers.

  2. Give an example of a simple food chain.

    • Grass → Grasshopper → Frog → Snake.

  3. Why are decomposers important?

    • They break down dead plants and animals, returning nutrients to the soil for producers.

  4. How does camouflage help prey animals?

    • It makes them harder to see, reducing the chance of being eaten.

  5. Describe one structural adaptation of a cactus.

    • Thick, fleshy stems store water; spines reduce water loss and protect from herbivores.

Section C: Experimental Analysis (Example)

Question 9.7:
A table shows voltage (V) and current (I) readings for a resistor at 0°C and 100°C. Explain why the resistance increased at higher temperature. New Mastering Science Workbook 2B — Chapter 9

Model answer:
At higher temperatures, metal ions in the resistor vibrate more vigorously. This increases collisions with free electrons, hence increasing resistance. This is consistent with the positive temperature coefficient of metals.