Question

Use the drop-down menus to complete each sentence. A substance that goes through a phase change starts as a solid. As it is heated, the substance exists as a ________. When the substance is completely melted, its temperature will increase until it reaches the ________ point. After the substance has finished boiling, it will exist as a ________.

1) liquid, boiling, gas
2) gas, boiling, liquid
3) liquid, melting, gas
4) gas, melting, liquid

Answer 1

The substance exists as a liquid when heated, reaches the boiling point when completely melted, and after boiling, it becomes a gas.

Step-by-step explanation:

A substance that goes through a phase change starts as a solid. As it is heated, the substance exists as a liquid. When the substance is completely melted, its temperature will increase until it reaches the boiling point. After the substance has finished boiling, it will exist as a gas. Therefore, the correct completion of the sentences using the provided drop-down menus is: A substance that goes through a phase change starts as a solid. As it is heated, the substance exists as a liquid. When the substance is completely melted, its temperature will increase until it reaches the boiling point. After the substance has finished boiling, it will exist as a gas.