Indiana's Lost River _______underground for a distance of 22 miles

• travels

• traveling

• to travel

• it travels

The 1980 explosion of _______ the first volcanic eruption in the continental United States in over 60 years.

• Mount St. Helens

• was Mount St. Helens

• it was Mount St. Helens

• Mount St. Helens was

Static electricity _________one cloud to another or between clouds and the ground creates lighting.

• flows from

• the flows from

• flowing from

• is flowing from

The model T car, introduced in 1908, ________$850

• the price was

• a price of

• to be priced at

• was priced at

_________reacts with a chlorine atom, an electron is transferred from the outer shell of the sodium atom to the outer shell of the chlorine atom.

• A sodium atom

• When a sodium atom

• For a sodium atom

• It is a sodium atom

In 1858, the site _______was to become the city of Denver was settled as a way station for outfitting gold prospectors.

• it

• of it

• what

• of what

The light from an electrical lamp includes many different wavelengths,________in a laser is concentrated on only one wavelength.

• all the energy

• it is all the energy

• while all the energy

• while all the energy is

In the Antarctic Ocean ______plankton and crustacean forms of life.

• an abundance of

• is an abundance of

• it is abundant

• an abundance is

Flintlock muskets _______sharp bayonets were standard weapons during the American Revolution.

• tip with

• tipped with

• the tips of

• were tipped with

Benjamin Franklin believed that the turkey rather than the eagle ________of the United States.

• should become the symbol

• the symbol becomes

• should symbolize becoming

• becoming the symbol