SI (International System)

Where did the "meter idea" started?

• North pole

• France

• Egypt

The base unity of mass is the ______

• Pound

• Kilogram

• mass

• gram

One kilogram is defined to be the mass of a _____cylinder at the International Bureau of Weights and Standards in Sèvres, France.

• iridium

• platinum

• platinum-iridium

• gold

The base unity of time is the ______

• Minute

• Second

• Hour

• Chronometer

All the satellites used for the (GPS) global positioning system in the sky must have:

• a timer

• an atomic clock

• a regular clock

• a chronometer

What's the Length in Meters? A typical E. coli bacterium is about 0.005 mm in length. Convert this length to meters (m):

• 5 x 10-5 m

• 5 x 10-6 m

• 5 x 10-7 m

The diameter of this typical galaxy is about:

• 10^22m

• 10^21m

• 10^11m

The size of these viruses (page 16), which are attacking a bacterial cell, is about one ten-millionth of a meter:

• 10^-7 m

• 10^-5 m

• 10^-6 m