Earth's Layers and Features Unit Test Why are sand dunes commonly found along the coast? (1 point)
O There is a lot of wind to carry the particles
O Moving water is needed to deposit the particles on the river bed
C
O Heavy wave action is needed to move the sand
O The salt in the water is needed to hold the sand together

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

What three things determine the shape and size of a puddle when water is poured out onto a surface