ROCKS
There many different types of weathering. The two main types are onion skin weathering and freeze thaw weathering. You may think rocks and weathering is a boring scince topic but this site aims to take the sigh out of science!
Freeze Thaw is the most common type of weathering in britian. This is because britian has a lot of rain and it freezes a lot.
Freeze Thaw starts off as rain falling into a tiny crack of a rock. Overnight there is a frost and the water freezes. As the water freezes and turns into ice it expands and makes the crack in the rock slightly bigger. The next day the crack fills up with rain water and freezes again and the rocks crack gets a bit bigger. After this has happened lots of times the rocks particles get weak and finally get split apart leaving the rock as pile of rubble.
Freeze Thaw is very dangerous when people are climbing high mountins. It is dangerous as rocks at the top of the mountin could be weathered by freeze thaw and crack and fall at any time! And I'm not talking about little rocks that you have in a garden I'm talking about huge bolders that could easily kill any mountin climber. So climbers make sure that before they climb there isn't any loose rocks.
Onion skin
Onion skin weathering is most common in very hot countries with deaserts in. In the day the rocks outer particles are made to expand by the extreme heat. In the night it is very cold and the rocks outer particles now contract. This happens day after day and the Particles get so weak they fall off. This keeps happening over millions of years until all thats left of the rock is a pile of rubble.