What are the two main causes of ocean tides?
Magnetic force and the rotation of Earth on its axis
Gravitational forces and the rotation of Earth on its axis
Gravitational forces and the rotation of the Moon on its axis
Magnetic force and the revolution of Earth on its axis
A diagram of the Moon and Earth systems is provided. At which points in the diagram would the lowest tides be expected?
W & Y
W & X
Y & Z
Z & X
Why does the moon's gravitational pull have more of effect on tides than the sun's gravitational pull?
they are the same
the Moon is larger than the Sun
tides are not caused by the Moon
the moon is much closer to the Earth than the Sun
The position of the Moon has an effect on the tides. High tide occurs on Earth in places that -
experience a waxing crescent Moon in the last day
are facing the Moon or directly opposite the Moon
experienced a first quarter Moon in the last day
has just experienced the Moon rising or setting
A student wants to use the objects pictured in the diagram to create a model of the Earth, Sun, Moon system. In which two positions could the student placethe golf ball to model the strongest tides?
X and Y
X and Z
Y and Z
Z and W