What things can affect the properties of a rock?

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

Wich is not standing in the way of astronomers getting a good view of different star

Where is having brightly colored feathers that attract mates most clearly an adaptation for a bird? a. a forest with dense vegetation b. a sandy beach beside an ocean c. a snowy tundra with little vegetation d. a swamp with many hawks that eat birds