Drivers of any age must take a vision test with each renewal. In 2011, the legislature turned away a proposal to test older driversâ reflex and reaction times starting at age 75, and to require every-six-months renewals for people 90 and older.
What causes the tides? It is the gravitational attraction of the sun and moon that cause waters of the ocean to raise and lower at different parts of the earth. Tides occur in oceans, and to a much smaller extent, tides also occur in large lakes, in the atmosphere, and within the solid crust of the earth.
What Causes the Tides? By Rick Groleau; Posted 11.19.02; NOVA; In this animated interactive, see how the motion of the Earth creates inertial forces that combine with the gravity of the moon and sun to produce ocean tides on our planet. Explore how the relative motion of the Earth, moon, and sun combine to produce ocean tides.