During spring tides * gravitational forces of the moon and sun work against each other causing the tidal
range between high and low tides to be at their smallest difference.
gravitational forces of the moon and sun combine creating a strong pull on the earth's
oceans and results in the greatest tidal range differences of a lunar month.
the sun, earth and moon are arranged at ninety degrees to one another.

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent