rips. reflection, refraction and diffraction

Which direction does a rip current usually flow?

• To the rocks

• Away from the shore

• Parraellel to the shore

• Towards the shore

What is the best way to escape a rip current if you get caught in one?

• Swim directly against the current towards the shore
  

• Dive underwater and swim beneath the current

• Swim parallel to the shore until you reach a sandbar then come in with the waves

• Float on your back until the current subsides

Fixed rips occur

• Between 2 sandbars

• Under a jetty

• Next to a rock wall

• Over a sand bar

Permanent rips exist

• over a sand bar

• Between 2 sand bars

• parallel to the beach

• Next to or under solid objects

Flash rips occur

• Over a sand bar

• next to a jetty

• next to a rock wall

• between two sandbars

Rips are more likely to occur

• During low tide

• During high tide

• next to permanent structures

• on windy days

When waves bounce off a surface, it is called

• Diffraction

• Reflection

• Refraction

When waves bend around a point, it is called

• Refraction

• Reflection

• Diffraction

The spreading out of waves as they pass through a narrow opening is called

• Reflection

• Diffraction

• Reflection

What is the main factor that causes waves to break as they approach the shore?

• An increase in water depth

• A decrease in water depth

• A change in wind direction

• The presence of underwater rocks