Soil and Water Cycle
Review
Mrs. DeLaura’s 3rd Grade Class
The carrying of weathered pieces of rock by wind, water, and gravity is called
_____.
erosion
The breaking down of rock into smaller
pieces, such as sand, silt, or clay is
called ______.
weathering
Land surfaces that are not covered with
plants are more likely to _______.
lose soil through erosion
Soil is created by a process of ____.
weathering
Materials that plants need to live and
grow are ___________.
nutrients
Soil helps plants to grow by providing ____ and _____.
support and nutrients
The components of soil are
___________.
rock, clay, silt, sand, and humus
The upper surface layer of soil is called ______.
topsoil
The layer of rock underneath the topsoil is called
____.
subsoil
The layer of soil that has the most
nutrients for plants is the _____.
topsoil
The plant nutrients in soil come from
_____.
humus
The solid layer of rock beneath the subsoil and loose
rocks is called _____.
bedrock
There is a layer of loose rocks between
the ______ and ______.
topsoil and subsoil
The pieces of decayed plants and animals in soil are
called _____.
humus
The top layers of soil are produced when bedrock _______.
breaks into smaller pieces
The process of producing soil takes
many ______.
years
Tiny particles of soil the are tightly
packed, hold water well and provide
some nutrients are called _____.
clay
Small grains of worn down rock that have few nutrients and do not hold water well
are ______.
sand
Soil particles that are larger than clay,
but smaller than sand are _____.
silt
The energy source that drives the water
cycle is the ____.
sun
The three processes that are involved in the water cycle are ___, ___, and ___.
Evaporation, condensation, and
precipitation
Ponds, lakes, streams, oceans,
and underground are all places where
_____.
water is stored
The movement of water from the
ground to the air and then back to the ground is called
____.
The water cycle
The process by which liquid water is
turned to water vapor is called ____.
evaporation
The process in the water cycle by which
water vapor is changed back into
liquid water is called ____.
condensation
The collecting of water in streams,
lakes, and oceans is called _____.
accumulation
In order for water to evaporate it must be
____.
heated
In order for condensation to
occur, water vapor must be ____.
cooled
Water that falls from the sky is called
____.
precipitation
The forms of precipitation are ___,
___, ___, and ___.
rain, sleet, hail, and snow
Runoff from over-fertilized lawns and
fields, oil from parking lots, soil erosion and animal waste are all
forms of _____.
Water pollution
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