1000 meters equals which unit?

• A. 1000 meters
• B. 10 kilometers
• C. 10000 centimeters
• D. 1 kilometer

Answer: (D)

1000 meters is the same distance as 1 kilometer. The metric system uses units that scale by powers of ten, and 1 kilometer equals 1000 meters, so 1000 meters can be written as 1 kilometer. Expressing the distance in a larger unit often makes numbers simpler, which is why the correct equivalent is 1 kilometer. The other options don’t fit because they either keep the same unit (not changing the unit), or they convert to a different amount that isn’t equal to 1000 meters (10 kilometers is 10,000 meters, and 10000 centimeters is 100 meters).