1.Which of the following is the main topic of the passage?
A. The Old Faithful geyser in Yellowstone National Park
B. The nature of geysers
C. The ratio of temperature to pressure in underground water
D. Regions of geologically recent volcanic activity
2.In order for a geyser to erupt?
A. hot rocks must rise to the surface of the Earth
B. water must flow underground
C. it must be a warm day
D. the earth must not be rugged or broken
3.The word it in paragraph 1 refers to?
4.As depth increases?
A. pressure increases but temperature does not
B. temperature increases but pressure does not
C. both pressure and temperature increase
D. neither pressure nor temperature increases
5.Why does the author mention and Ice in?
A. To compare areas of high volcanic activity
B. To describe the Yellowstone National Park
C. To provide examples of areas where geysers are located
D. To name the two regions where all geysers are found
6.Hoe often does Old Faithful erupt?
A. Every 10 minutes
B. Every 60 minutes
C. Every 125 minutes
D. Every 170 minutes
7.The word expelling in paragraph 4 is closest in meaning to
8.What does the author mean by the statement :
Old Faithful earned its name because, unlike most geysers, it has never failed to erupt on schedule even once in eighty years of observation?
A. Old faithful always erupts on schedule
B. Old Faithful is usually predictable
C. Old Faithful erupts predictably like other geysers
D. Old Faithful received its name because it has been observed for many years
9.According to the passage, what is required for a geyser to function?
A. A source of heat, a place for water to collect,an opening, and underground channels
B. An active volcano nearby and a water reservoir
C. Channels in the Earth and heavy rainfall
D. Volcanic activity, underground channels, andsteam