🔬 Part 1: Salt Sample Observations

1. Use a magnifying glass or microscope to examine each salt sample. Record your observations below:

Sea Salt:

Colour: _______________ Texture: _______________ Crystal shape: _______________

Draw what you see above

Rock Salt:

Colour: _______________ Texture: _______________ Crystal shape: _______________

Draw what you see above

Table Salt:

Colour: _______________ Texture: _______________ Crystal shape: _______________

Draw what you see above

2. Which salt sample had the most uniform crystal shape?

Sea salt

Rock salt

Table salt

🌊 Part 2: Origins and Formation

3. Match each salt type to its correct origin by drawing lines:

Sea salt

Rock salt

Table salt

Mined from ancient salt beds

Evaporation of seawater

Purified and processed salt

4. Explain how sea salt is formed in nature:

5. What geological process created the rock salt deposits we mine today?

6. Which types of salt might contain trace minerals? (Check all that apply)

Sea salt

Rock salt

Table salt

🏠 Part 3: Uses and Applications

7. List three different uses for salt in everyday life:

1. _________________________________

2. _________________________________

3. _________________________________

8. Why is table salt often iodised in New Zealand?

To improve taste

To prevent iodine deficiency

To make it dissolve faster

To preserve food better

9. Describe one industrial use of salt and explain why salt is suitable for this purpose:

10. Reflection: Based on your observations, explain why different types of salt have different appearances even though they are all essentially the same chemical compound (NaCl):

Salt Investigation Worksheet

Salt Investigation Worksheet

🔬 Part 1: Salt Sample Observations

🌊 Part 2: Origins and Formation

🏠 Part 3: Uses and Applications

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