EVERYDAY SCIENCE

Detailed explanation-1: -The basic unit of length in the metric system is the meter. All units of length in the metric system are derived from the meter. The prefix “centi-“means one hundredth. Conversion between units of length in the metric system involves moving the decimal point to the right or to the left.

Detailed explanation-2: -In the metric system of measurement, the most common units of distance are millimeters, centimeters, meters, and kilometers.

Detailed explanation-3: -The base unit for measuring length in the metric system is the meter. Other units used to measure distance and length are related to the meter. For example, a kilometer (km) is equal to 1, 000 meters (m), there are 100 centimeters (cm) in a meter, and there are 1, 000 millimeters (mm) in one meter.

Detailed explanation-4: -The metre is the length of the path travelled by light in vacuum during a time interval of 1/299792458 of a second. This definition fixed the speed of light in vacuum at exactly 299792458 metres per second (≈300000 km/s or ≈1.079 billion km/hour).