Biology I TEKS Student M
EQ: Where do all the dead things go?
Did dinosaurs drink my water?
Ecology Cycles PPT
Handout
Targeted Skills
models/diagrams, relationships, making generalizations, analyze,
predict
Enduring Understanding
Energy and matter are transferred in the environment within and
between organisms.
Broad Brush Knowledge
cycles, carbon-oxygen cycle, nitrogen cycle, water cycle
Concepts Important to Know and Understand
Element Cycles
Core Objectives
4. Analyze the flow of elements in the carbon-oxygen, nitrogen,
and water cycles.
Matter Statement: _____________________________________________________________________
Define a Cycle: _______________________________________________________________________
WATER CYCLE
___
1. evaporation
a. water changing from a gas state into a liquid or solid state such as
water vapor into rain, hail, sleet or snow
___
2. condensation
b. water gathering into an area such as in a pond, lake, stream or
ocean
___
3. precipitation
c.
___
4. transpiration
d. water loss form plants as water vapor is lost into the air through
stomates (little openings) in leaves
___
5. runoff
e. water changing from a liquid state to water vapor, a gas state
___
6. accumulation
f.
water changing from a water vapor gas state to a liquid state such
as water vapor into liquid drops on the cool surface of a glass
water moving across a surface (water running into a stream then
into the ocean)
Why are water cycles said to be driven by the sun? ___________________________________________
_________________________________________________________________________________
Use the vocabulary above to label the water cycle diagram.
Ecology Cycles PPT Handout – TEKS Student M (Revised May 26, 2005)
(printed 3/9/2016) p. 1
CARBON CYCLE
How does carbon dioxide enter the living part of the Carbon Cycle?
_________________________________________________________________________________
___
1.
respiration
a.
CO2 is released back into the atmosphere as organic matter is broken
down
___
2.
photosynthesis
b.
CO2 is released back into the atmosphere when food (glucose) is
broken down
___
3.
decomposition
c.
CO2 is released back into the atmosphere when rock such as limestone
containing CaCO3 (calcium carbonate) are broken down
___
4.
combustion
d.
CO2 is taken from the air and trapped into food (glucose) by plants
___
5.
erosion
e.
CO2 is released back into the atmosphere when organic material is
burned
Using the vocabulary above, label the diagram of the carbon cycle.
Write a descriptive summary of the events in the animated carbon cycle diagram.
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
Ecology Cycles PPT Handout – TEKS Student M (Revised May 26, 2005)
(printed 3/9/2016) p. 2
NITROGEN CYCLE
How do we acquire usable nitrogen? ______________________________________________________
_________________________________________________________________________________
Why do we need nitrogen? ______________________________________________________________
_________________________________________________________________________________
Can plants and animals use free nitrogen? _________________________________________________
_________________________________________________________________________________
In what form must N2 be to be used by plants? ______________________________________________
_________________________________________________________________________________
What organisms can fix the N2 into a usable form? ___________________________________________
_________________________________________________________________________________
Nitrogen Cycle Simplified
___
1.
free N2 “bank”
a.
the form of nitrogen that can be used by organisms
___
2.
nitrogen-fixation
b.
___
3.
nitrates
c.
Dead organisms, animal waste and organic litter are decomposed by
bacteria and other decomposers
pure nitrogen, not in any other compound, found in the atmosphere
___
4.
organisms
d.
bacteria convert nitrates from decomposition back into free nitrogen.
___
5.
organic material
e.
___
6.
denitrification
f.
Plants take in nitrates and use them in their tissues; animals eat the
plants and get the nitrates from their tissues
bacteria convert free nitrogen into nitrate compounds
Label and write a brief description of the parts of the simplified nitrogen cycle diagram cycle.
RIP
Ecology Cycles PPT Handout – TEKS Student M (Revised May 26, 2005)
(printed 3/9/2016) p. 3