The children were introduced to key scientific vocabulary including:
🌟Tributary - where they all meet
🌟Upper / middle / lower sections
🌟Estuary - opens up into the ocean
🌟Mouth - where the estuary enters into the sea
🌟 Transportation - moving the pebbles / sand etc
We discussed how the River Lostock meets the yarrow (near Preston), runs into the Douglas and then into Ribble.
We continued to think about what a river does. Flowing from the source, a river does a range of things called river processes.
The three main processes are:
🌟erosion (wearing it away - from the start from the v shape valleys, rubs the rocks and breaks them away. They tumble and become pebbles)
🌟Middle course - meander
Still erodes but slightly different.
Roots are usually under the ground. It crashes into the ‘wall’ the outside bank erodes more than the inside bend. When there is most rain it is stronger.
🌟Inside bend - deposition. River puts everything down as it’s not as much energy so it cannot carry the pebbles or dirt. Makes areas called the river bank or river beach. Puts all the sediment (sand, grit) back that it has been carrying on its journey.
We have lots of very soggy children...not because of the rain, but them not realising how ‘high’ their wellies were 😉