The rangers dislodge the boulder and it rolls down the hill, crashing to the ground below and splitting into several different pieces. In what way has the mass of all the pieces changed compared to the original boulder?
A boulder is sitting atop a hill in a park with a steep slope next to it. It appears to be a very large boulder and is perched precariously close to a pathway. The park rangers are unsure what to do with the boulder, as it poses a threat to passersby.
It has decreased.
none of these
It has changed to a different form.
It has increased.
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