Q: When the hemoglobin loses its oxygen, it changes to what color? Choices: - purple red - grayish red - light pink - bluish red A:
bluish red

Q: What is the term for a galaxy that is a rotating disk of stars and dust? Choices: - cosmic galaxy - nebula - Milky Way - spiral galaxy A:
spiral galaxy

Q: Of course, a net external force is needed to cause any acceleration, just as newton proposed in his second law of what? Choices: - land - gravity - speed - motion A:
motion