Q: What explains the spherical shape of ceres, once thought to be the largest asteroid? Choices: - orbital plane - space debris - low gravity - high gravity A:
high gravity

Q: Fish and other aquatic organisms use gills to capture dissolved what? Choices: - food - sulfur - nitrogen - oxygen A:
oxygen

Q: What do you call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars? Choices: - conical galaxies - irregular galaxies - spiral galaxies - elliptical galaxies A:
elliptical galaxies