Understanding Tides

What primarily causes the periodic rise and fall of sea levels known as tides?

• Gravitational forces of the moon and sun

• Wind patterns

• Ocean currents

• Earth's rotation

Why does the moon have a stronger influence on Earth's tides than the sun?

• The moon is larger than the sun

• The moon is closer to Earth than the sun

• The moon has a stronger gravitational force

• The moon's orbit is faster

What are spring tides?

• Tides with the smallest range

• Tides occurring during the moon's quarter phases

• Tides with higher than normal high tides and lower than normal low tides

• Tides that occur only in spring

During which lunar phase do neap tides occur?

• Quarter phases

• Full moon

• Eclipse

• New moon

What effect causes the tidal wave to bend and create different movements in the hemispheres?

• Coriolis effect

• Gravitational pull

• Magnetic field

• Ocean currents

What is a semi-diurnal tide?

• One high and one low tide each day

• Two high tides and two low tides each day

• Tides with no variation

• Tides that occur only in the Pacific Ocean

Which factor does NOT affect the tidal range?

• Temperature of the water

• Depth of the ocean floor

• Shape of the coastline

• Distance from the amphidromic point

What is the intertidal zone?

• The area between high and low tide marks

• The deepest part of the ocean

• The area with the highest tides

• The zone with no marine life

What is the term for the horizontal movement of water accompanying the vertical rise and fall of tides?

• Sea breeze

• Wave motion

• Tidal current

• Ocean current

When does the velocity of tidal currents reach its maximum?

• At low tide

• At mid tide

• At high tide

• During slack water