Vocabulary

• have to: Must do
• energy sources: Materials or processes that can produce energy.
• pump up: To inflate something with air using a pump.
• at some point: At an unspecified time, usually in the future.
• at least: As a minimum
• thanks to: Because of; as a result of.
• pump out: To remove liquid from somewhere using a pump.
• used to: Did regularly before, but don't do now
• rule in: To make an official decision in favor of someone in a legal case.
• as a rule: Generally; usually
• in particular: Specifically; especially.
• in the past: During a former period of time; previously.
• with the exception of: Excluding; not including.
• check out
• put together: To build or assemble something small, e.g. a toy
• think about: To consider something carefully.
• along with: In addition to; together with.
• stuff: Generic description for things, materials, objects
• alternative: Something different you can choose
• description: Explanation of what something is like, looks like
• manipulate: To try to control others to gain an advantage
• consume: To eat, drink, buy or use up something
• claim: To say that something is true, often without proof.
• curious: Wanting to know more about something
• whopping: (Informal) huge; very big
• consumption: The act of buying and using products
• atmosphere: Air around us
• demand: Desire customers have to buy product, service
• climate: Typical weather conditions in a particular place
• ability: The power, resources or skill to do something
• increase: To make or become larger in size or amount
• decade: Period of 10 years
• exist: To be present, alive or real
• odd: Being unmatched with someone or something
• fuel: To give power to (a mob, anger, etc.); incite
• crust: Hard outer layer of something, e.g. the earth
• reach: To come to or arrive at a goal or destination
• society: A group who meet to share values or interests
• drill: A machine that makes holes with a metal bit
• intentionally: With a plan to do or achieve something
• define: To explain the meaning of words
• administration: Act of giving e.g. medicine to a patient
• advance: Forward movement by an army
• pretty: Being attractive to the eye in a simple way
• introduce: To open an essay to set the scene
• harness: To capture the power of something
• click: To work well with someone or something
• extinct: (Of animal, etc.) having died out; with none left
• poll: Process of gathering opinions by asking questions
• exception: Something different or not included
• peak: Part of a cap that sticks out over your eyes
• fossil: Plant or animal that became rock after many years
• regularly: At the usual time each day, week, or month
• margin: Edge of an area
• century: Period of 100 years
• promise: To say you will certainly do something
• dwindle: To make or become less or smaller gradually
• thermal: Item of warm clothing for cold weather use
• drive: A person's ambition and motivation to do something
• change: To exchange one set of clothes for another
• burn: To destroy with fire
• world: All the humans, events, activities on the earth
• renewable: Being able to be replaced naturally
• check: Paper showing how much you owe at a restaurant
• climb: To rise gradually and steadily to a higher point
• time: Speed at which music is played; tempo
• forest: Large area with many trees
• unit: One apartment in a building
• kinetic: Of or relating to movement
• hydraulic: Of a system operated by water or other liquids
• gorilla: Very large African ape, usually with dark fur
• kerosene: A liquid fuel used in heaters, lamps
• distil: To collect the pure form by heating liquid