Two identical rocks fall down a cliff and land in a stream. One breaks into three smaller pieces and the other one does not. They sit in the stream for 20 years until someone takes them out and measures the total mass of each rock. Which will have more mass, the whole rock or the rock in three pieces? Explain your

Afarmer who is grown corn for the past five years notices in the sixth year that the his harvest is significantly smaller, despite an increase in labor on the farm. the following year, the harvest continue to decline. which of the following explanations most plausibly accounts for the reduction in corn yield? a) soil degradation b) desalinization c) better irrigationd) terracing