Vocabulary

• on earth: Used to emphasize a question expressing surprise or anger.
• for life: For the duration of one's life; permanently.
• common ancestor: An ancestor that two or more species have in common and from which they both evolved.
• search for: To try to find someone or something.
• in order to: For the purpose of; with the aim of.
• of course: Sure ; Certainly
• alternative energy: Energy generated from natural resources, such as sunlight, wind, rain, tides, and geothermal heat, which are renewable.
• back out: To say you will now not do something you promised
• along with: In addition to; together with.
• for short: As a shortened form of a name or phrase.
• check out
• incredible: Very good; amazing
• essential: Extremely or most important and necessary
• recognize: To accept the truth or reality of something
• alternative: Something different you can choose
• evidence: Factual proof that helps to establish the truth
• evolve: To develop certain features
• common: Area in a city or town that is open to everyone
• advantage: Thing making the chance of success higher
• consume: To eat, drink, buy or use up something
• identify: To indicate who or what someone or something is
• harsh: Rough; tough; hard to experience or accept
• atmosphere: Air around us
• complex: Group of buildings all used for the same purpose
• contribute: To be a factor in causing something to happen
• concentrate: To cause to be present in large amount or number
• divide: To split numbers by another number, e.g. 6 / 2 = 3
• crust: Hard outer layer of something, e.g. the earth
• diversity: Having a range of different races, ideas etc.
• surface: To give (road) a top layer
• form: Sports team or person's current winning record
• candidate: Politician who is running for public office
• ancestor: A person from your family that lived in the past
• release: To free someone from a responsibility or burden
• generate: To create or be produced or bring into existence
• planet: One of the bodies that orbit the sun
• widespread: Happening or existing in many places
• oxygen: A gas in the air that we need to breathe
• organic: Developing naturally and without a set structure
• steep: Very expensive
• radiation: Energy transmitted as rays, waves or particles
• hostile: Unwelcoming; showing ill will, as to an enemy
• fossil: Plant or animal that became rock after many years
• trace: To make an outline to determine a shape
• activity: An action or task, e.g. sports, washing clothes
• dioxide: An oxide containing two oxides per molecule
• assemble: To put parts together to make a complete unit
• methane: Colorless gas without smell often used as fuel
• order: Religious or social group, as of nuns
• simple: Not hard to understand or do; not complex
• modern: Of the present time; up to date; contemporary
• rise: To wake up and get out of bed after sleeping
• pack: Bag carried on the back of donkey, etc.
• grow: To get bigger and more mature; make plants do this
• vent: To express anger or grievance loudly/with feeling
• nitrogen: A colorless chemical element without a smell
• expel: To force a person to leave a place or organization
• wind: A current of air moving approximately horizontally, especially one strong enough to be felt
• atlantic: Of the ocean between Africa and the Americas
• cover: To record a different version of another song
• life: All the living things e.g. animals, plants, humans
• cradle: Small bed for a baby, with rockers and sides
• lose: To be unable to keep in check or control something
• gradient: A measure of how steep something is
• magma: Hot liquid rock from the Earth's crust
• solvent: Substance used to dissolve or melt others
• mid: At (or near) the middle point
• ammonia: Colorless liquid or gas used in cleaning products
• slurry: Mixture of snow, mud, concrete or animal waste
• alkaline: Containing or behaving like an alkali
• seawater: Water from the sea; salt water