Vocabulary

• warm up: To gently exercise muscles before doing sport
• look for: To try to find a thing or person that is lost
• look at: To use your eyes to focus on something
• leak out: If secret information leaks out, it becomes known to the public.
• improve: To make, or become, something better
• environment: Natural world in which plants and animals live
• efficient: Able to produce results without waste
• condition: To improve something to make it better
• energy: Physical or mental strength
• protect: To defend someone or something from harm or danger
• great: Very good; better than before
• heat: State of anger, excitement, or arguing
• costly: Being very expensive, often wasteful
• save: To make your computer keep a file
• home: House, apartment or building to be rented or sold
• air: Mixture of gases around the earth that we breathe
• stop: To block or close something
• money: Coins or notes we use to pay for things