7. A rock has three minerals in itOne of them, quartz, has a hardness of 7 The secondfeldspar, has a hardness of 4. The third, biotite, has a hardness of 2.5. What is true about the hardness of rock?

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.