Options: (1). Ice; (2). heat; (3). Water; (4). H20; (5). mL; (6). Oil; (7). Gas; (8). Urea;

Fact 1: Heating a liquid can be used to identify that liquid 's boiling point. Fact 2: Boiling is the conversion of a liquid to a gas. Given the two facts above, what does liquid turn into when it's heated?
Answer:
(7).