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Let's start by completing the table and working through the exercises in the image.

### Completing the Table:

1. **Micromètre (µm)**:
   - Decimal: \( 0.000001 \) m
   - Scientific Notation: \( 10^{-6} \) m

2. **Millimètre (mm)**:
   - Decimal: \( 0.001 \) m
   - Scientific Notation: \( 10^{-3} \) m

3. **Kilomètre (km)**:
   - Decimal: \( 1,000 \) m
   - Scientific Notation: \( 10^3 \) m

4. **Année-lumière (light year)**:
   - Decimal: \( 9.461 \times 10^{15} \) m (as given)
   - Scientific Notation: \( 9.461 \times 10^{15} \) m (already in scientific form)

---

### Converting the Given Measurements:

1. **Diamètre d'un globule rouge (red blood cell diameter):**  
   - Given: \( 8 \ \mu m \)
   - Decimal: \( 8 \times 10^{-6} \) m  
   - Scientific Notation: \( 8 \times 10^{-6} \) m

2. **Rayon du soleil (radius of the Sun):**  
   - Given: \( 6.95 \times 10^5 \ \text{km} \)
   - Convert to meters:
     \[
     6.95 \times 10^5 \ \text{km} = 6.95 \times 10^5 \times 10^3 \ \text{m} = 6.95 \times 10^8 \ \text{m}
     \]
   - Decimal: \( 695,000,000 \ \text{m} \)
   - Scientific Notation: \( 6.95 \times 10^8 \ \text{m} \)

3. **Pandoravirus size:**  
   - Given: \( 1,000 \ \text{nm} \)
   - Convert to meters:
     \[
     1,000 \ \text{nm} = 1,000 \times 10^{-9} \ \text{m} = 1 \times 10^{-6} \ \text{m}
     \]
   - Decimal: \( 0.000001 \ \text{m} \)
   - Scientific Notation: \( 1 \times 10^{-6} \ \text{m} \)

4. **Distance Terre-Soleil (Earth-Sun distance):**  
   - Given: \( 150 \ \text{million km} \)
   - Convert to meters:
     \[
     150 \times 10^6 \ \text{km} = 150 \times 10^6 \times 10^3 \ \text{m} = 1.5 \times 10^{11} \ \text{m}
     \]
   - Decimal: \( 150,000,000,000 \ \text{m} \)
   - Scientific Notation: \( 1.5 \times 10^{11} \ \text{m} \)

Would you like more details or have any questions about these conversions?

### Related Questions:
1. How would you convert 0.000001 into scientific notation?
2. Why is the year-lumière value so large compared to others?
3. What is the significance of using scientific notation in these cases?
4. Can you think of any other small units that are often expressed in scientific notation?
5. How would you express the size of an atom in scientific notation?

**Tip:** When converting between units, always be mindful of the power of 10 associated with each unit prefix (e.g., nano = \(10^{-9}\), kilo = \(10^3\)).

Convert various measurements between decimal and scientific notation, including nanometers, micrometers, millimeters, kilometers, and light-years.

Learn how to convert units like nanometers, micrometers, and kilometers into decimal and scientific notation. This example includes exercises such as the size of a virus, the radius of the sun, and the Earth-Sun distance. Suitable for students in Grades 7-9.

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