Earth Science

Materials found in nature that people and other living things use are ________________________.

A ______________________ is any material that can be used to satisfy a need.

Waste products that damage an ecosystem is ___________________.

A resource that once used cannot be replaced in a reasonable amount of time are called ______________________.

A _______________________ is a resource that can be replaced within a reasonable amount of time.

A ____________________ is the remains or traces of an organism that lived long ago.

The _________________ is the age of one thing compared to another.

The _________________ describes a kind of thing that is no longer found on Earth.

In a sequence of rock layers, the oldest layer of rock is ___________________ of the sequence.

The youngest layer of rock is ____________________.