To find the scale factor, we express the given scale as a fraction in terms of the same unit.

Given:

• 7 millimeters represents 1 meter.
• Convert 1 meter to millimeters:
  $1 \text{ meter} = 1000 \text{ millimeters}$
• Write the ratio as a fraction:
  $\frac{7 \text{ mm}}{1000 \text{ mm}}$
• Simplify the fraction:
  $\frac{7}{1000}$

Final Answer:

The scale factor is $\frac{7}{1000}$.

Would you like an explanation of how scale factors are used in real-life applications?

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Here are some related questions for further practice:

1. If a building in the drawing is 35 mm tall, how tall is the actual building?
2. What would be the drawing length for a 25-meter-long store?
3. If another scale is given as 5 mm = 2 m, what is the scale factor?
4. How would the scale change if the drawing used centimeters instead of millimeters?
5. Can you convert the scale factor into a decimal?

Tip: A scale factor is always written as a ratio without units. It helps compare model sizes to real-world sizes!