Vocabulary

• in the presence of: While someone or something else is present.
• due to: Because of; owing to
• in mind: Being aware of or considering something.
• think about: To consider something carefully.
• compared with: In relation to
• also known as: Also called; alternatively named.
• in conclusion: Used to indicate a summary or final point.
• eventually: After a long time; after many attempts; in the end
• determine: To control exactly how something will be or act
• split: No longer married or in a relationship
• accurate: With no mistake or error; Correct
• presence: The same place or area that a person is
• vessel: Container, such as a cup, for holding liquids
• conclusion: End of something; finish
• concentration: Amount or number of something in a thing or place
• appearance: The way a person looks to others
• distinctive: Having a quality that is different from others
• occur: To come to pass or to happen
• reaction: Bodily response to a drug or something eaten
• pause: To stop doing for a while before continuing
• form: Sports team or person's current winning record
• identity: Collection of qualities that makes a person
• compare: To consider how similar and different things are
• create: To make, cause, or bring into existence
• due: When something is required or expected
• solution: Mix of a liquid and a solid or a gas
• mind: To be bothered or upset by something
• oxygen: A gas in the air that we need to breathe
• pop: To cause something to open or burst suddenly
• hint: To suggest without being direct about it
• glow: Pink color in the face, e.g. from exercise/emotion
• place: To put someone in a particular type of situation
• carbon: Chemical element with an atomic number of 6
• confirm: To formally approve or check something
• dioxide: An oxide containing two oxides per molecule
• formation: Process of creating; making a particular shape
• calcium: A substance important for making bones and teeth
• learn: To get knowledge or skills by study or experience
• sound: Sensible, dependable and reliable
• continue: To do something without stopping, or after pausing
• lit: To cause something to burn; put a burning match to
• explosion: Loud and sudden expression of emotion
• product: Item that can be bought
• laboratory: A place to do scientific experiments
• bubble: A small ball of air inside of a liquid
• bleach: Chemical that disinfects and whitens
• burn: To destroy with fire
• hydrogen: Lightest of all chemical elements
• lesson: Something done to learn or teach something; class
• hear: To be aware of sound; to perceive with the ear
• combustion: An act or instance of burning
• chlorine: Greenish-yellow gas with a strong smell
• flammable: Burning quickly and easily
• mouth: Hole in the face used for eating and talking
• carbonate: To charge a drink with carbon dioxide
• squeaky: Making a high-pitched sound, like a mouse
• lime: White containing calcium used in farming
• ammonia: Colorless liquid or gas used in cleaning products
• smoke: To give off a cloud of grey gas from burning
• ammonium: A chemical derived from ammonia
• mini: Small British car