Vocabulary

• wipe down: To clean a surface by wiping it with a cloth.
• state: Region within a country, with its own government
• natural: Being as one would expect; being usual or normal
• stay: To keep trying without giving up
• flame: To glow
• store: To put things in a place for later use
• odor: A certain smell, often strong or distinct
• fire: Heat and the flame produced when burning
• add: To include as well
• small: Little in size; not big
• air: Mixture of gases around the earth that we breathe
• vertical: (Of a line, etc.) going up and down; not horizontal
• leak: Act of (gas, liquid) escaping through a small hole
• qualified: To earn a qualification through exam, studying
• usage: Amount something is used
• tank: Container for holding liquid or gas