This melt, called magma, rises through cracks and erupts into volcanoes. As the tectonic plate moves over the stationary hot spot, volcanoes are rafted away and new ones are formed in their place. This results in volcano chains, such as the Hawaiian Islands. Hope I helped!
If each balloon is 9 feet long, the conversion to yards would be exactly 3. Multiplying 3 yards of string by the amount of balloons will get you how much she needs, in this case, she would need 150 yards of string.
