Earth’s tides are affected by the gravitational pull of the Sun and the Moon, but mainly the Moon because the Moon is (1) Each day, each costal region on Earth experiences two high tides and two low tides in a (2) time period. This is because the gravitational attraction of the Moon creates (3) on two opposite sides of the planet. Two spring tides occur monthly, when the Moon is in its new and full phases. During these phases, the Moon and Sun are oriented ,(4) which gravitationally pulls the water on Earth in the same direction, creating a large tidal range. (1) A. closer

B. larger

C. denser

(2) A. 12-hour

B. 16-hour

C. 24-hour

(3) A. tidal bulges

B. moon phases

C. orbits

(4) A. in a straight line

B. at a right angle measuring 90 degrees

C. at an acute angle measuring 23 degrees