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10 questions
Materials found in nature that people and other living things use are ________________________.
resource
natural resource
renewable resource
nonrenewable resource
A ______________________ is any material that can be used to satisfy a need.
pollution
natural resource
resource
renewable resource
Waste products that damage an ecosystem is ___________________.
nonrenewable resource
resource
renewable resource
pollution
A resource that once used cannot be replaced in a reasonable amount of time are called ______________________.
natural resource
pollution
nonrenewable resource
renewable resource
A _______________________ is a resource that can be replaced within a reasonable amount of time.
renewable resource
pollution
natural resource
nonrenewable resource
A ____________________ is the remains or traces of an organism that lived long ago.
rock
relative age
fossil
extinct
The _________________ is the age of one thing compared to another.
fossil
rock
relative age
extinct
The _________________ describes a kind of thing that is no longer found on Earth.
relative age
rock
fossil
extinct
In a sequence of rock layers, the oldest layer of rock is ___________________ of the sequence.
younger
at the top
in the middle
at the bottom
The youngest layer of rock is ____________________.
in the middle
at the bottom
at the top
older