Rust: What is the difference between windows and chunks?

1let v = vec![1, 2, 3, 4, 5];
2
3// windows(2): [1,2], [2,3], [3,4], [4,5]
4for window in v.windows(2) {
5    println!("{:?}", window);
6}
7
8// chunks(2): [1,2], [3,4], [5]
9for chunk in v.chunks(2) {
10    println!("{:?}", chunk);
11}