To use less of something is to __________.
reduce
The layer of Earth that people live on is called the ____________.
crust
To take something old and make it into something new is to ____________.
recycle
To save or protect is to __________.
conserve
Trash that people leave in the environment is called ___________.
litter
To make something different is to ____________.
change
Something we use that is from the Earth is a _____________.
natural resource
To use something again is to __________.
reuse
A part of something that is different from the parts above and below it.
layer
Everything in an area where people, plants and animals live.
environment
A process where pieces of soil, rock or sand are moved by wind, water or ice is called ___________.
erosion
A large fire that happens in a wooded area is called a __________.
wildfire
Waste that hurts the land, air and water is called ___________.
pollution
An overflow of water covering land that is usually dry is called a ________.
flood
We live on planet __________.
Earth
The power to do work is __________.
energy