Q: Q: Viroids are plant pathogens much simpler than what, but like them can reproduce only within a host cell? A: | OPTIONS:
- pests
- bacteria
- parasites
- viruses
A: viruses

Q: Q: What do you call mixtures of ash and water that travel down river valleys? A: | OPTIONS:
- debris
- pollutants
- mud slides
- lahars
A: lahars

Q: Q: What molecule consists of two atoms of hydrogen and one atom of oxygen? A: | OPTIONS:
- carbon monoxide
- hydrogen peroxide
- air
- water
A: water

Q: Q: What is the energy of motion called? A: | OPTIONS:
- binary energy
- potential energy
- mixed energy
- kinetic energy
A: kinetic energy