Transcript A Watched Pot Never Boils

Vocabulary Chapter 4: Lesson 1
Litter
 Topsoil
 Subsoil
 Bedrock
 Erosion
 Nutrient depletion
 Fertilizer
o Desertification
o Drought
o Land reclamation

Litter
The
top layer of
dead leaves
and grass.
topsoil
o
o
Mixture of rock
fragments, water, air
and decaying animal
and plant matter.
Ex. This is where the
roots absorb the water.
subsoil
o
This layer also contains
rock fragments and
air and water, but it
doesn’t as much
animal and plant
matter.
Bedrock
•
The rock that
makes up the
earth’s crust.
erosion
o
The process that
water, wind, or ice
moves particles or
rocks and soil
Nutrient depletion
o
Soil becomes less
fertile
fertilizers
o
Substances that
farmers use to put
nutrients back into
the soil to help
crops grow better
desertification
o
When a once fertile
area becomes
depleted of nutrients
and moisture, it
becomes like a desert
drought
o
A period when less
rain than normal
falls
Land reclamation
o
The process of
restoring land to a
more productive
state.