capable of being slowly destroyed and broken down into very small parts by natural processes

the story of a real person's life written by another person

a biological or chemical substance or situation that is dangerous to human beings and the environment

a science that deals with things that are alive, such as plants and animals

a symbol that is used in printed text

a minor planet; one of thousands of small bodies that cirlce around the sun

a person who travels into outer space in a spacecraft

a person who studies stars, planets, and other objects in outer space

extremely large

heard or able to be heard

a group of people who gather together to listen to or watch something

of or relating to the sound that is heard on a recording or broadcast

a short performance to show the talents of someone

a large room or building where people gather to hear a speech or watch a performance

producing good or helpful results or effects

kind and generous

not causing death or serious injury; not cancerous

something good that is more than what was expected or required

giving or providing many desired things; giving or existing in large amounts