What makes waves?

1. 1

   Wobble says

   Wind blows across the top of the sea and rubs against the water. Little ripples start to rise. The longer the wind keeps blowing, the more the ripples grow, until they're big, rolling waves. So most of the waves you see were made by the wind.

   For ages 4–7
   Hear Wobble

   Checked against What causes ocean waves? (NOAA Ocean Exploration)

2. 2

   Does the water travel with the wave?

   Watch me bob as a wave rolls under me. Up I go, forward, down and back, round in a little circle. Hee hee! The water does the same thing, so it hardly travels at all. What zooms across the sea is the wind's push, passed along from water to water.

   For ages 6–9
   Hear Wobble

   Checked against What causes ocean waves? (NOAA Ocean Exploration)

In Lil' Phil, reaching the bottom of this wonder earns a sticker for Wobble's collection.

• 

  Why does the tide go in and out?

  Ages 4–11Wobble
• 

  Why is the sea salty?

  Ages 4–11Wobble