Which words stand out in the questions you need to consider? These become your key search words. Eg 'change'. Your key search words might be eg. 'art nouveau' AND 'change'. 

Source: Europeana

Do the same search for 'bauhaus' AND 'change' and you'll see some potentially good resources:

One of the first things you'll want to know about your art/design movement/style is the dates. Which part of history does it belong to? 

Why not use the search terms 'design movements' AND 'timeline'?

This is what I found when I did that search:

You would also need to know where the movement originated so that you could research what was going on there at that time. Eg your search words for Bauhaus might be 'bauhaus' 'origin' 'country'. This led me to the Metropolitan Museum: 
The Bauhaus was founded in 1919 in the city of Weimar by German architect Walter Gropius (1883–1969). Its core objective was a radical concept: to reimagine the material world to reflect the unity of all the arts. 

Scan the page for any other leads, eg from this page about Bauhaus on the Met Museum website, you could explore the links in the right hand navigation:

Explore these. Eg I selected 'keywords', then 'modern and contemporary art' to find these results:

When you land on a good website, skim read for things that refer to the 'change' you are looking for. This may not literally include the word 'change', but look out for anything that indicates the same thing. Here's what I found: