Why is the sea blue?

1. 1

   Wobble says

   Sunlight looks white, but it has every colour mixed inside it. When it shines into the sea, the water soaks up the reds and oranges. The blues are left over. So when you look out at the sea, it's mostly blue light that reaches your eyes.

   For ages 4–7
   Hear Wobble

   Checked against Why is the ocean blue? (NOAA Ocean Service)

2. 2

   Then why does the sea look green some days?

   Seawater often has tiny bits floating in it, like specks of sand and mud. When light bounces off those bits, the sea can look green, or even red. So the colour you see depends on what's floating in the water.

   For ages 6–9
   Hear Wobble

   Checked against Why is the ocean blue? (NOAA Ocean Service)

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

• 

  What lives at the very bottom of the sea?

  Ages 4–11Wobble
• 

  Why is the sea salty?

  Ages 4–11Wobble