How are spring and neap tides different from regular tides? check all that apply.

they occur twice a day.
they are caused by wind.
they occur twice a month.
they are extra-high tides and extra-low tides.
they are caused when the sun and the moon align and exert additional gravitational pull.

Explanation:

Tides are periodic movements of the great masses of water on our planet as part of the gravitational attraction exerted by the moon and the sun on Earth.  

In this sense, there are two very special cases:  The Spring and Neap tides.

Spring tides  

Occur when there is a full moon or new moon, which makes the tides higher. During these lunar phases, the Moon, the Earth and the Sun are aligned and the gravitational attraction power is greater.  

Neap tides  

Occur when the moon, the earth and the sun form a right angle (), being the gravity attraction on the masses of water the minimum. This happens in the crescent and wanning phases.

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