Typical length1 tenths m
1 tenthsMinecraft blocks
1.3 tenthsCello lengths
682 millionthsGreat Pyramid heights
Photo from Wikimedia Commons
Pumice Stone
The only rock that floats on water/Geology & Minerals
Pumice is a lightweight volcanic rock formed when gas-rich lava is ejected during an explosive eruption and cools so rapidly that the gas bubbles are trapped inside. With a density often below 1,000 kg per cubic meter, pumice is the only rock that routinely floats on water. A typical bathroom pumice stone is about 10 cm long and weighs just 50 grams. In 2012, a pumice raft covering 26,000 square kilometers was spotted floating in the Pacific after an underwater eruption near Tonga.
Measurements
Typical mass5 hundredths kg
54.9 octillionElectrons
167 sextillionGlucose molecule weights
610 trillionthsWashington Monuments
Typical volume100 millionths m^3
16.7 millionthsCement mixer drums
114 billionthsBoeing 747 cabins
314 trillionthsSupertanker holds
Formation temperature1,173 K
3.56Sahara Desert peaks
2.61Baking ovens
3.82Chocolate melting points
2012 pumice raft area26 billion m^2
56.5 millionIMAX screens
1.3 trillionSubway tiles
933 millionStudio apartments
Near Tonga