If being exposed to breezes can cause erosion of soil, then what can cause erosion of soil? Answer choices: - ice - breezes - mines - rainfall - sun rays - moon light - rivers - flooding
breezes

If hydrogen bonds cause H20 to expand when it freezes, then what causes H20 to expand when frozen? Answer choices: - evaporation - vaporization - hydrogen bonds - helium bonds - mysterious forces - nitrogen bonds - Physical weathering - precipitation
hydrogen bonds

If ejaculation of sperm can be inhibited by bacterial infection, then bacterial infection can inhibit ejaculation of what? Answer choices: - babies - sperm - sugar - animals - erection - eggs - humans - pregnancy
sperm