Adjectives: describing objects

As found in nature and not involving anything made or done by people.

Having several different uses.

Having been used before and then put through a process so that it can form a new product.

Relating to the relationships between the air, land, water, animals, plants, etc... of a particular area.

Effective; helping you to do or achieve something.

Not allowing water to go through.

Using or relating to signals and computer technology.

It consists of things such as computers, televisions, and radios.

Using the most advanced and developed machines and methods.

Made at home and not bought from a shop.

Using the energy from the sun to produce electric power.

Someone else had it or used it before you.

Intelligent, or able to think quickly or intelligently in difficult situations

Something that works by itself or with little human control.