Vocabulary

• over time: Gradually; as time passes.
• force in: To enter a place by applying physical force.
• food source: A place or thing from which food is obtained.
• used to: Did regularly before, but don't do now
• for instance: As an example.
• for example: As an illustration or instance.
• in the loop: Being kept informed about something.
• in length: Relating to the measurement of something from end to end.
• instead of: When one thing is replaced by another
• in check: Under control; restrained.
• look at: To use your eyes to focus on something
• change over: To switch from one thing to another.
• matter: To be of great importance; to count
• negative: The opposite to a positive electrical charge
• positive: Showing agreement or support for something
• effect: An advantage, benefit
• population: Number of people who live in a country, area etc.
• grow: To get bigger and more mature; make plants do this
• maintain: To keep saying something a certain way
• allow: To admit the validity or truth of something
• prey: To hunt (other animals) in order to eat them
• loop: A circle or curved shape, as when you tie a lace
• ecosystem: Types of plants and animals in an specific area
• food: What people and animals eat to live
• feedback: A response or opinion, about a service, etc.
• soil: Conditions in which something develops
• link: Any one of the rings that are part of a chain