A river and its flood plain

In the picture

1. 1The narrow channel: the small groove the river fills every day
2. 2The flat valley floor: the wider ground that water covers in a moderate flood
3. 3The broad plain: the far ground that water reaches only in an extreme flood

Examples

• A gutter that carries rain away every day, then floods the whole street after a storm.
• A bathtub filling up and spilling over onto the bathroom floor.

Quiz: A river and its flood plain (Age 10)

1. 1

   What is true about a river’s channel?

   • It is wide most days and narrow during floods.
   • It is always the same width.
   • It is small most days and wider during floods.
2. 2

   In a moderate flood, where does the water spread?

   • All the way across the broad plain.
   • Only inside the narrow everyday channel.
   • Over the flat valley floor beside the river.
3. 3

   When does water reach the broad plain?

   • Only in a moderate flood.
   • Only in an extreme flood.
   • Whenever it rains a little.

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.