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

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.

Who examines and coordinates the cleanup of polluted sites?

Which statement best describes the liquid state of matter? a. it has definite shape but indefinite volume. b. it has definite shape and definite volume. c. it has indefinite shape and indefinite volume. d. it has indefinite shape but definite volume.