Answer and Explanation:
As we know, an adjective is a word that modifies a noun or a pronoun by attributing a quality to it. Let's focus on each sentence at a time:
- The monstrous shuttle pitched forward slightly, then rocked back. --> According to the number in parentheses, we only have one adjective here. In that case, it can only be monstrous, indicating the quality of the shuttle, its appearance.
- Over seven million pounds of thrust pushed the anxious men upward. --> According to the number in parentheses, we have two adjectives here. Numbers are usually adjectives. In this case, the number we have is seven million, and it is modifying the noun "pounds". Besides that, anxious is also an adjective, modifying the noun "men".
- The solid-rocket booster engines lit, and the shaking roar told the astronauts they were entering outer space. --> Now, we are supposed to have four adjectives in the sentence. The noun "engines" is being modified by two adjectives: first by solid-rocket, then by booster. The next adjective is shaking, modifying the noun "roar". Finally, we have outer, modifying the noun "space".