Which regional european countries were part of the soviet bloc?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Why slip off slopes are found on the inside of meanders? why river cliffs are found on the outside of meanders?

Ineed , i need to create a power point in life science here is a picture explaining a little what the topic is about, me with some information for my slides : (