the state of being extremely tired

Relating to science, or using organised methods of science

the process of damaging something so badly that is does not exist or cannot be used

people or animals that continue to live after a dangerous situation

to think very carefully about something you are doing and nothing else

a rock from outer space that becomes very hot as it enters Earth's atmoshere

extremely small

the parts of something that continue to exist after the rest of it has been destroyed

to return to the way it was before something bad happened

to hit by accident, often with force

a large round object in space that moves around the sun

something that makes you believe something is true

the relationship between living things and the environment

a large hole in the ground

the layer of gases around the Earth