Officially, the metric unit for time is a second (just like metric unit for weight is a gram, for length is a meter, and for volume is a liter). However, we do not use the standard prefixes (kilo-, deci-, centi-, etc.) with seconds to describe other time lengths. a. Using the metric system prefixes (definitions were given in class packet) and using seconds as the "base unit" of time, let's convert some of our "usual" time measurements (minute, hour, etc.) into equivalent "metric" seconds: i. 1 minute = _______ deka-seconds ii. 1 hour = _______ kilo-seconds iii. 1 day = _______ kilo-seconds b. The metric system also has some larger (and smaller) units than the ones discussed in class. There are also: Mega- = 1,000 kilo- = 1,000,000 base units Ex: 1 Megameter = 1,000,000 meters Giga- = 1,000 Mega- = 1,000,000,000 base units Ex: 1 Gigaliter = 1,000,000,000 liters Using whichever is the appropriate prefix: i. Convert a month into an approximate amount of Mega-seconds or Giga-seconds. ii. Convert a year into an approximate amount of Mega-seconds or Giga-seconds. iii. How long is one Mega-second in days? iv. How long is one Giga-second in years? c. How fast is 65 mph in kilometers per kilo-seconds? d. Convert your kilometers per kilo-seconds answer in part (c) into meters per second. What is the relationship between the km/kilo-seconds and m/s? Will this always be the case? e. Despite not using seconds with the standard prefixes for larger time values, we actually do use one of the prefixes for a very small time value: milliseconds. Check (by googling) and explain that a milli-second fits with the metric system's definition of the "milli-" prefix