1. 
If lava flows out of Mount Gustaffson at a rate of 45 cubic meters per day, how much lava will have flowed out after 9 weeks?


2. 
There are 5000 watts of continuous power available from the Big Town thermal spring. The Littleville thermal spring has 16 times that much power available. How much continuous power is available at the more powerful spring?


3. 
A volcanic eruption last week on Torubella Island released ten million tons of ash into the air. The last time the volcano on the island erupted, sixty million tons of ash was released. How much more ash was released on the previous event compared to the most recent one?


4. 
* This is a premade sheet. Use the link at the top of the page for a printable page. 

5. 
The magnetic field of the earth reverses polarity every 100,000 to 1,000,000 years. What would the minimum expected number of polarity reversals be after a period of 272 million years?


6. 
Near the end of the Ordovician period (about 430 million years ago), the earth's sea level is thought to have been about 400 feet above the current sea level. If the earth's current sea level rose by 31 feet, what would the difference in sea level be, compared to the sea level near the end of the Ordovician period?

