AHMAD investigates how quickly hydrochloric acid reacts with zinc. First he tries mixing acid from the same bottle with different amounts of water. Which reaction is the fastest? (Note: the more water the less concentrated)

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.