Q: Soluble minerals and clays accumulate in what soil layer, allowing it to hold more water? Choices: - silt - subsurface - topsoil - subsoil A:
subsoil

Q: Telescopes use which kind of lenses to enlarge images? Choices: - crystalline - spherical - concave - convex A:
convex

Q: The transmitted light strikes a photoelectric tube, which converts the light energy to? Choices: - heat - color - gas - electricity A:
electricity

Q: The elements are arranged in rows, each representing the filling of what shell? Choices: - plasma membrane - proton - neutron - electron A:
electron