Transcript Earth`s Biomes - Cobb Learning

Mind Stretcher - Tuesday
Which of the following is NOT a way that
nitrogen cycles through the
environment?
a. Decomposition releases nitrogen into the
soil.
b. Plant roots take up nitrogen from the soil.
c. Nitrogen is stored in fossil fuels.
2. Which process does NOT release carbon
dioxide?
a. Combustion
b. Respiration
c. Photosynthesis
1.
Mind Stretcher
 Name
of Desert Animal:
 2 Interesting Facts:
Earth’s Biomes
Chapter 23
THE BOTTOM LINE:
 Biomes
are dependent on two very
important environmental factors:
Average Temperature and Average Rainfall
 Biomes are named after the dominant
type of vegetation associated with large
land areas.
 The three major biomes are: (1) Deserts,
(2) Grasslands, (3) Forests
BIOME
Organizer
Heavy
Rainfall
Average
Rainfall
Light
Rainfall
Cold Temp. Avg. Temp.
Hot Temp.
Taiga
Deciduous
Coniferous or
Boreal
Forests
Temperate
Forests
Tropical
Rain
Forests
Prairie
Savanna
Polar Grasslands
Temperate
Grasslands
Tropical
Grasslands
Cool
Deserts
Temperate
Deserts
Tropical
Deserts
Tundra
Celsius Scale
30’s Warm
20’s Nice
10’s Cold
0’s Ice
Deserts have these qualities:
1.
2.
3.
4.
5.
Precipitation is low and limited
Evaporation exceeds precipitation (Rain
dries out very fast)
Light vegetation & clear skies
Most animals are small and nocturnal
(come out at night)
Hot days – Cool nights!!
Types of Deserts
Tropical Desert - hot all year, few plants,
wind-blown surfaces
EX: Sahara
Desert Climate
Graph
Types of Deserts
Temperate Deserts - Daytime temp. hot in
summer & cool in winter
EX. The Mojave Desert
Types of Deserts
Cool Desert – Warm summers & cold, cold
winters
EX: The Gobi Desert
Brrr…It’s
cold here
Desert Food Web
QUESTION?????
What do all of these deserts have in
common? Think of three observations.
NO, you don’t
have to write
this question
down!
Grasslands have these qualities:
1.
2.
3.
Precipitation is high enough to allow grass to
grow.
Droughts and fires prevent permanent forests.
Home to large herbivores (bison, zebras etc.)
and many borrowing animals (meerkats, prairie
dogs)
Types of Grasslands
Savanna (Tropical Grassland): high avg. temps. with
a prolonged dry season of 4-6 months. Rest of the
year is wet.
Types of Grasslands
Prairie (Temperate Grasslands): Strong
winds that blow almost continuously &
evaporation is rapid.
Prairie Climate
Graph
Types of Grasslands
Tundra (Polar Grasslands): Most of the year the
climate is extremely cold with high winds & snow
cover. Winters are long and avg. precipitation is
low (mostly snow)
Question?????
 Close
your eyes and imagine a simple savanna
food web.
 What would happen in your food web, if the
top level consumers were removed?
HANDS FREE!
EYES ON ME!
EARS PLEASE!
Forests have these qualities:
1.
2.
A wide variety of plants, dominated by
trees.
Provides a variety of habitats for a
variety animals. (birds, deer, bears,
mice, possum, insects, etc.)
Types of forests:
Tropical Rain Forests: constant hot temp., high
humidity, daily afternoon rains, poor soil,
hardwood trees, most animals live in the
canopy, most biologically diverse
Rainforest Climate
Graph
Types of forests:
Deciduous forests: moderate temps., changes a lot
during the 4 seasons, abundant precipitation,
deciduous trees loose their leaves each fall,
nutrient rich soils
Types of Forests:
Tiaga: winters are long & dry, lots of snowfall & short
days, temps. range from cool to extremely cold,
dominated by conifers
Compare and contrast
Draw the following venn diagram on your
paper and fill it in.
Forests
Grasslands
Deserts