*Question*
Q: What force pulls people and objects toward the center of the earth? Choices: - magnetism - variation - motion - gravity A:
**Answer**
gravity

*Question*
Q: Connective tissues typically have three characteristic components in common: cells, large amounts of amorphous ground substance, and what else? Choices: - antioxidants - hormones - white blood cells - protein fibers A:
**Answer**
protein fibers

*Question*
Q: In physics, _______ is defined as the average kinetic energy of the particles in an object? Choices: - climate - potential energy - heat - temperature A:
**Answer**
temperature

*Question*
Q: Further transformation occurs during organogenesis, the formation of what? Choices: - arteries - muscles - bones - organs A:
**Answer**
organs