Answer:
Both the identity and the properties of a substance change
Explanation:
Chemical changes occur when a substance combines with another to form a new substance
Uncle Tyrones snores and the chainsaw
Sentence 4
The topic sentence should set up what the paragraph is going to be about. This paragraph is about both heroes of the 1940s and heroes of the present, and sentence four is the only sentence that includes both. It also provides an indication that the paragraph is going to be comparing both types of heroes to each other.
