We're going to carry on with our Rivers topic this week. Hopefully, by now you should have a good idea of the main features of a river and have learnt about some of the world's major rivers.

Here's a couple of handy videos to give you a bit more information about those features, if you would like to watch them (you don't have to).

If you have some time, have a go at this river features matching quiz to refresh your memory. Some of the features might be new to you, but work out the ones you know then have a guess at the others! It's no problem if you get some wrong or don't know the answer - we're always learning! :)

This week:
OL: to understand how rivers change over time

Rivers change a lot in their lifespan and their features can shift. Have a look at the powerpoint below which explains the terms:

• erosion and deposition
• meanders (you'll need your Discovery Espresso login for this video- it has been emailed to your parents)
• oxbow lakes

If you click on each term, it will take you to the relevant video link from the powerpoint.

We know this is a little complicated, so don't panic if you don't quite understand. Just start to have a think about the fact that erosion is when rocks and minerals in the riverbed and riverbanks are worn away because fast flowing water is very forceful. Then, the bits of rocks and minerals that have been eroded are deposited somewhere else along the river where the speed is slower.

You have a choice of tasks now:
EITHER write a definition of the 4 terms: erosion, deposition, meander and oxbow lake in your HLBs.

OR, if you feel you have a great grasp of this, have a go at the worksheet below in your HLB.
If you don't have a printer, neatly copy out the picture in Question 1 on the sheet into your HLB and then label the parts, before matching the definitions by writing them out. Then, discuss with someone else in your house where you think the meanders are in Question 2 (you don't need to copy out the map in your book or try to explain in writing).