Matching
Match each phylum with the correct description
arthropods
jointed body parts and an external skeleton
cnidarians
radial symmetry and stinging cells
annelids
segmented body and closed circulatory
echinoderms
system
internal skeletons made of hardened plates

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)

What volume of argon gas is equal to 1.60 grams of argon