Q: What is the smallest unit of a chemical element called? Choices: - cell - droplet - nucleus - atom A:
atom

Q: Polyester fabric's resistance to wrinkling comes from the cross-linking of what? Choices: - algae strands - velocity strands - wool strands - polymer strands A:
polymer strands

Q: What happens when a neutral atom gains or loses electrons? Choices: - it loses protons - it gains protons - it loses neutrons - it becomes an ion A:
it becomes an ion

Q: What is the process of removing wastes and excess water from the body? Choices: - depletion - diffusion - ingestion - excretion A:
excretion