Tides and Lunar Phases

The video explains the phenomenon of tides, focusing on spring and neap tides. It describes how the gravitational pull of the moon and sun affects sea levels, causing high and low tides. The video details the tidal cycle, including the alignment of the sun, earth, and moon, which results in spring tides when aligned and neap tides when at a right angle. The video concludes with a recap of how the moon's phases influence ocean tides.

What does the term 'tide' refer to?

• The rotation of the earth on its axis

• The orbit of the moon around the earth

• The gravitational pull of the moon and sun causing sea levels to rise and fall

• The movement of the earth's crust

Why does the moon have a stronger pull on the ocean closest to it?

• Because the earth's rotation is faster on that side

• Because the moon's gravitational force is stronger at a closer distance

• Because the sun's gravitational force is weaker on that side

• Because the ocean is larger on that side

How often do high tides occur each day?

• Once

• Twice

• Three times

• Four times

How long does it take for the moon to make a full rotation around the earth?

• 27.32 days

• 7 days

• 30 days

• 24 hours

What happens when the sun, moon, and earth are directly aligned?

• Neap tides occur

• Spring tides occur

• The earth's rotation slows down

• The moon becomes invisible

What is a crescent moon?

• When the moon is half visible

• When the moon is fully visible

• When the moon is not visible at all

• When a small sliver of the moon is visible

What angle do the sun, earth, and moon form during a neap tide?

• 45 degrees

• 60 degrees

• 90 degrees

• 180 degrees

What happens to the ocean bulges during a neap tide?

• They become larger

• They cancel each other out

• They disappear

• They move faster

How often does a neap tide occur after a spring tide?

• 3 days

• 7 days

• 14 days

• 30 days

What can you infer about the ocean based on the shape of the moon?

• The speed of the earth's rotation

• The occurrence of spring or neap tides

• The temperature of the ocean

• The distance between the earth and the sun