I still root for metric prefixes over language-based numbers (kilogram over one thousand grams, even megameter over one thousand kilometers).

But it’s still hard to imagine some

Meter

1 nanometer, a few atoms wide

1 micrometer, thinner than hair, or paper

1 millimeter, as thin as thin pasta

1 meter, within arm’s reach

1 kilometer, a short jog

1 megameter, as wide as Montana

1 gigameter, as far as to the Moon & back

1 terameter, as far as to Jupiter

1 petameter, to the other side of the Milky Way

Gram

1 nanogram, 50 trillion carbon atoms

1 microgram

1 milligram

1 gram, a small noodle

1 kilogram, a pizza

1 megagram, a small sports car

1 gigagram, 3-4 Airbus A380s (or 2 ISSs)

1 teragram, 2 of the largest supertankers

1 petagram, maybe 5% of Lake Michigan

Second

1 nanosecond, a few CPU cycles

1 microsecond, a context switch

1 millisecond, a foot away as the sound flies

1 second, one 1000, two 1000…

1 kilosecond, 16 minutes

1 megasecond, 12 days

1 gigasecond, 32 years

1 terasecond, uh.. 32,000 years

1 petasecond, …… 32 million years