Original sentence: Pumas hunt at night and can carry prey five times heavier than they are.
Corrected sentence (simple): Pumas hunt at night and can carry prey that is five times heavier than they are.
Better sentence (clearer): Pumas hunt at night and can carry prey that weighs up to five times as much as they do.
Why this is better (for a 7-year-old):
- We add words like "that is" or "that weighs" to show we are talking about the weight of the prey.
- "Five times as much as they do" is an easy way to compare weights (how heavy something is).
Fun fact: Pumas are also called mountain lions or cougars.