93 / 96
recycle
to use again
renewable resource
a natural resource
that can replace or replenish itself
naturally over time
reservoir
a place where water is collected
and stored
retain
to hold or continue to hold
runoff
rain that does not evaporate or
soak into the ground
salt water
ocean water
scale
something divided into regular
spaces to use as a tool for measuring.
Rulers and thermometers are both scales.
shaft
a rod or bar that rotates
sink
to go under water as a result of being
more dense than water
soak
to be absorbed or move into another
material
soil
a mixture of humus, sand, silt, clay,
gravel, or pebbles
solar radiation
light from the Sun
solid
a state of matter that has a definite
shape and volume
speed
the measure of an object’s change
in position over time
storm surge
when water piles up along
a coast, rushing toward land faster than it
can return to sea
surface area
the area of liquid exposed
to or touching the air
surface tension
the skinlike surface
on water (and other liquids) that pulls it
together into the smallest possible volume
temperate zone
the climate for the
majority of Earth, which includes a wide
range of temperatures
temperature
a measure of how hot or
cold the air is
texture
the feel or general appearance of
an object or a material
thermometer
a tool used to measure
temperature
tropical zone
a hot climate with no
winter
volume
three-dimensional space
water
a liquid earth material made of
hydrogen and oxygen
water cycle
the repeating sequence of
condensation and evaporation of water on
Earth, causing clouds and rain and other
forms of precipitation
water quality
a term used to describe
the purity of water
water turbine
a modern waterwheel
water vapor
the gaseous state of water
waterwheel
a wheel turned by the force
of moving water
weather
the condition of the air around
us
weather balloon
a balloon that carries
weather instruments into the sky
weigh
to find the mass of. An object is
weighed to find its mass.
wetland
an area of land close to a large
body of water
wind meter
a weather instrument that
measures wind speed with a small ball in
a tube
wind vane
a weather instrument that
measures wind direction
93