Estimates, Scale

standard paperclip ≈  1.0 gram

Nickel = 5.0 grams

220 pound man ≈ 100 kg

1 liter water bottle = 1 kilogram

2 liter bottle of water = 2 kilograms

20 drops  ≈ 1 milliliter

drop ≈ 0.05 milliliters

2-L soda bottle = 2 liters

height of door knob ≈  1 meter

standard door frame = 2 meters

one side of a track = 100 meters

one lap of a track = 400 meters

2.5 laps of a track = 1 kilometer

Boiling water = 100º C

Body temperature = 37º C

Room temperature = 25º C

Freezing water = 0º C