Area
A hectare (ha) is two football fields side-by-side; it is one square hectometer; a hectare
is 10 thousand square meters; 1 square kilometer is 100 hectares
VVC is on a plot of land that is 100 hectares (101.2 ha; it borders Bear Valley, Spring
Valley Parkway, Spring Valley Country Club, and Yates Rd on the east).
Los Angeles County is 10,577 square km (its borders extend to the 138 on the north, east
to Claremont, south to Long Beach, and west to the ocean)
California is some 425,000 square km (423,970 km2)
Alaska has some 1.7 million square km (1,717,854 km2)
The United States is some 10 million square km (9,826,675 sq km)
Russia is 17 million sq km (17,098,242 sq km)
Volume
A liter is 1 thousand milliliters; the amount of water in a 1-liter water bottle
A typical kitchen sink will have 20-25 liters of volume
A typical bathtub has 200 liters of capacity.
A cubic meter is 1 thousand liters
Weight
A gram is about the weight of a paper clip
The US nickel weighs five grams
A kilogram is the weight of a one-liter bottle of water
A metric ton (tonne) is 1,000 kg, or a megagram
A large sack of dogfood will typically weigh 15 kg
2012 Toyota Corolla weighs 1300 kg
A typical household refrigerator will weigh anywhere from 90 to 130 kg
A 24-pack of soda weighs 10 kg
70% of American men (above age 20) weigh between 70 and 106 kg; the average weighs
88 kg.