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Rising and falling of Earth's sea levels due to the gravitational pull of the moon and sun on earth as it rotates.

• Moon Phases
• Tides
• Seasons

A[n] ___________ tide occurs when the sun, Earth, and the moon are nearly in a line. 

• spring
• high
• low
• neap

The Moon has a greater influence on Earth tides than the Sun because...

• it is smaller than the Sun
• it revolves around the Earth
• it is closer to the Earth

How many times per month does a spring tide occur?

• Once
• twice
• three times
• it changes every month

What is the name of this lunar phase?

• waxing crescent
• waning crescent
• waxing gibbous
• waning gibbous

A[n] ______________ tide occurs when the sun is at right angles to the line between Earth and the moon. 

• high
• neap
• low
• spring

The movement of one object in a circular path or orbit around another object.
(Causes the seasons, tides, and lunar cycle)

• Rotation
• Revolution
• Spinning
• Gyrating

As the moon's shape appears to get smaller, we say that the moon is _.

• swelling
• waxing
• waning
• disappearing

What is the name of this lunar phase?

• 1st Quarter
• 3rd Quarter
• waxing crescent
• waxing gibbous

Phases of the moon in which the moon appears to be getting larger are referred to as _.

• waxing
• waning
• new
• eclipse