Bands on the Rocky Shore

In the picture

1. 1Stubby green tufts on the upper rock
2. 2Bladder-covered olive fronds midway down
3. 3Reddish frilly clumps near the waterline
4. 4A tall ribbon-like kelp below the waterline

Examples

• Barnacles and rockweed near the top of a jetty
• Kelp forests in deeper water off a beach

Quiz: Bands on the Rocky Shore (Age 12)

1. 1

   Why do different seaweeds and animals live at different heights on a rocky shore?

   • Because the rock changes colour at each height.
   • Because they can survive being out of water for different lengths of time.
   • Because they prefer different rock shapes.
2. 2

   A seaweed that can stay out of water only a short time would most likely live where?

   • Near the waterline, where the tide covers it most often.
   • High on the upper rock, where it is uncovered for the longest.
   • In the middle band, where it is uncovered for a medium time.
3. 3

   What mainly creates the horizontal bands on a rocky shore?

   • Animals eating seaweed only at certain heights.
   • Seaweeds growing toward sunlight from the top down.
   • The regular rise and fall of the tide uncovering different heights for different times.

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.