Ocean Tides

A ________ is a change in water level at the shoreline. 

• tide
• gravity
• wave
• beach

What causes tides?

• The pull of gravity between the Earth and Moon
• The pull of gravity between the Earth and Sun
• Both answer choices

How many high tides does a beach experience in 24 hours?

• 1
• 2
• 3
• 4

How many low tides does a beach experience in 24 hours?

• 1
• 2
• 3
• 4

How much time passes between each high tide and low tide?

• 3 hours
• 6 hours
• 12 hours
• 24 hours

The ________'s gravity has the most powerful effect on the Earth's waters.

• moon
• sun

Why does the moon have a greater effect on tides than the Sun?

• the moon is bigger than the Sun
• the moon is closer to Earth than the Sun
• the moon has a greater magnetic attraction
• the moon isn't as hot as the Sun

The moon pulls water on the side of the Earth facing the moon toward itself while the water on the opposite side also gets pulled out

• True
• False

Low tides occur on the sides of the Earth that are not facing toward or away from the moon

• True
• False

A spring tide has high tides that are __________ than normal.

• higher
• lower