How rip currents are formed and how to avoid drowning

The video explains how waves breaking over sandbars create circulation cells, leading to the formation of rip currents. These currents travel in narrow, fast-moving belts due to pressure gradients. The velocity of rip currents depends on wave height, ranging from 0.5 to 2.5 meters per second. Swimmers caught in rip currents should not swim against them but instead move along the current until it weakens, then swim parallel to the shore and back to safety.

What causes the formation of circulation cells that lead to rip currents?

• Calm sea conditions

• High tide levels

• Weak wave activity

• Strong wave breaking in certain locations

How does the water level change on the landward side when waves break over a sandbar?

• It fluctuates

• It increases

• It remains the same

• It decreases

What happens when longshore currents converge?

• They turn outward through the low water zone

• They create a whirlpool

• They stop moving

• They dissipate

What factor influences the velocity of a rip current?

• The color of the water

• The height of incoming waves

• The temperature of the water

• The time of day

What should swimmers do if they encounter a rip current?

• Swim directly to shore

• Swim against the current

• Float and wait for help

• Swim parallel to the shore