Comparing
Newspapers hire writers to watch movies and rate them. The writers usually have one of two reactions. If they like the movies, they write good things about them. They give these movies a "thumbs up." However, if the writers don't like the movies, they write about that. They give these movies a "thumbs down." What key word lets you know this is contrast?
however
If things have something in common, does it mean they are similar or different?
similar
Does "likewise" show comparing or contrasting?
Comparing
A fish gets oxygen through water but a hamster breathes air. Hamsters live in cages, but goldfish live in bowls. Hamsters have fur, but goldfish have scales. What key words let you know this is contrast?
but
Does "yet" show comparing or contrasting?
contrast
Does "however" show that a comparison or contrast is being made?
contrast