When reading this book, should I write down ALL the words that I don't understand?

I am reading this book for school pg. 48–53 – Conservatism, Elements of Conservatism, Paternalistic conservatism, The new right, Neoliberalism and Neoconservatism
I don’t understand most of the words, I have a tab open on my computer for Cambridge Dictionary and am looking up all the words that I don’t know. Should I write all of them down and the meanings in my own words in my notes book or what? I have a 30 minute test next class and I can use only notes,the teacher also put up notes which am gonna print and they are not about what am reading now, they are about the last chapter we read.
Hope you understand where am going by this.