To determine which of the given units is not approximately equivalent to the listed metric units, we need to compare each option to its corresponding metric unit.
Given metric units and their common approximate equivalents in the Imperial system are:
1. 1 kilometer ≈ 0.6 miles
- This is a commonly accepted approximate equivalence. Thus, 0.6 miles is equivalent to 1 kilometer.
2. 1 meter ≈ 1 yard
- This is also a well-known approximate equivalence. Hence, 1 yard is equivalent to 1 meter.
3. 1 kilogram ≈ 2 pounds
- This is another frequently used approximate equivalence. Therefore, 2 pounds is equivalent to 1 kilogram.
4. 1 liter ≈ 1 quart
- While not listed explicitly, it is often known that 1 liter is roughly equivalent to 1 quart in volume measures.
Now let's check the fourth option given:
- 1 gallon
- A gallon is significantly larger than a liter. Specifically, 1 gallon is equivalent to approximately 3.785 liters. Therefore, 1 gallon is not approximately equal to 1 liter.
Based on this analysis, the unit that is not approximately equivalent to any of the listed metric units is:
1 gallon
So, the final answer is:
1 gallon
