The document discusses the water, carbon, and nitrogen cycles. It explains that in the water cycle, water is constantly evaporating from surfaces, condensing in the atmosphere, and falling as precipitation to then run off or be absorbed in a repeating cycle. The carbon cycle involves carbon being exchanged between living things, the atmosphere, oceans, fossil fuels, and rocks. The nitrogen cycle traps nitrogen gas from the air as compounds in the soil through fixation by bacteria or lightning, which are then used by plants and decomposed or released through denitrification.

1. Cycles in
Ecosystems

2. What is the Water Cycle

3. What is the Water Cycle
What is the water cycle? The continuous
movement of
condensation
water between
Earth’s surface
and the air is
precipitation
watershed the water cycle.
evaporation
transpiration
runoff
groundwater All water on Earth is
recycled constantly.
Lesson 1 a

4. What is the Water Cycle
What is the water cycle? The continuous
movement of
condensation
water between
Earth’s surface
and the air is
precipitation
watershed the water cycle.
evaporation
transpiration
runoff
groundwater All water on Earth is
recycled constantly.
• Evaporation: Changing of liquid into gas Lesson 1 a

5. What is the Water Cycle
What is the water cycle? The continuous
movement of
condensation
water between
Earth’s surface
and the air is
precipitation
watershed the water cycle.
evaporation
transpiration
runoff
groundwater All water on Earth is
recycled constantly.
• Evaporation: Changing of liquid into gas Lesson 1 a
• Condensation: Changing of gas into liquid

6. What is the Water Cycle
What is the water cycle? The continuous
movement of
condensation
water between
Earth’s surface
and the air is
precipitation
watershed the water cycle.
evaporation
transpiration
runoff
groundwater All water on Earth is
recycled constantly.
• Evaporation: Changing of liquid into gas Lesson 1 a
• Condensation: Changing of gas into liquid
• Precipitation: Any form of water

7. What is the Water Cycle
What is the water cycle? The continuous
movement of
condensation
water between
Earth’s surface
and the air is
precipitation
watershed the water cycle.
evaporation
transpiration
runoff
groundwater All water on Earth is
recycled constantly.
• Evaporation: Changing of liquid into gas Lesson 1 a
• Condensation: Changing of gas into liquid
• Precipitation: Any form of water
• Watershed: An area from which water is drained

8. What is the Water Cycle
What is the water cycle? The continuous
movement of
condensation
water between
Earth’s surface
and the air is
precipitation
watershed the water cycle.
evaporation
transpiration
runoff
groundwater All water on Earth is
recycled constantly.
• Evaporation: Changing of liquid into gas Lesson 1 a
• Condensation: Changing of gas into liquid
• Precipitation: Any form of water
• Watershed: An area from which water is drained
• Runoff: water not absorbed into streams

9. What is the carbon cycle

10. What is the carbon cycle
What is the carbon cycle?
combustion CO2 in air
(human-made
and natural)
photosynthesis dissolved
respiration
CO2 in water
decomposition
marine plankton
coal natural gas remains
oil
rock
The carbon cycle is the continuous exchange
of carbon among living things.
Lesson 1 b

11. What is the carbon cycle
What is the carbon cycle?
combustion CO2 in air
(human-made
and natural)
photosynthesis dissolved
respiration
CO2 in water
decomposition
marine plankton
coal natural gas remains
oil
rock
The carbon cycle is the continuous exchange
of carbon among living things.
Lesson 1 b
• Carbon is in every living thing

12. What is the carbon cycle
What is the carbon cycle?
combustion CO2 in air
(human-made
and natural)
photosynthesis dissolved
respiration
CO2 in water
decomposition
marine plankton
coal natural gas remains
oil
rock
The carbon cycle is the continuous exchange
of carbon among living things.
Lesson 1 b
• Carbon is in every living thing
• We take in carbon dioxide through the air

13. What is the carbon cycle
What is the carbon cycle?
combustion CO2 in air
(human-made
and natural)
photosynthesis dissolved
respiration
CO2 in water
decomposition
marine plankton
coal natural gas remains
oil
rock
The carbon cycle is the continuous exchange
of carbon among living things.
Lesson 1 b
• Carbon is in every living thing
• We take in carbon dioxide through the air
• Animals give off through respiration

14. What is the nitrogen cycle

15. What is the nitrogen cycle
What is the nitrogen cycle? nitrogen gas
in air (N2)
The nitrogen cycle nitrogen fixation
is the continuous
trapping of nitrogen
gas into compounds
in the soil and its
return to the air.
denitrification
decomposition absorption
nitrate
ammonia nitrite
Lesson 1 c

16. What is the nitrogen cycle
What is the nitrogen cycle? nitrogen gas
in air (N2)
The nitrogen cycle nitrogen fixation
is the continuous
trapping of nitrogen
gas into compounds
in the soil and its
return to the air.
denitrification
decomposition absorption
nitrate
ammonia nitrite
• Nitrogen is part of the genetic material in all cells Lesson 1 c

17. What is the nitrogen cycle
What is the nitrogen cycle? nitrogen gas
in air (N2)
The nitrogen cycle nitrogen fixation
is the continuous
trapping of nitrogen
gas into compounds
in the soil and its
return to the air.
denitrification
decomposition absorption
nitrate
ammonia nitrite
• Nitrogen is part of the genetic material in all cells Lesson 1 c
• 78% of the air is nitrogen

18. What is the nitrogen cycle
What is the nitrogen cycle? nitrogen gas
in air (N2)
The nitrogen cycle nitrogen fixation
is the continuous
trapping of nitrogen
gas into compounds
in the soil and its
return to the air.
denitrification
decomposition absorption
nitrate
ammonia nitrite
• Nitrogen is part of the genetic material in all cells Lesson 1 c
• 78% of the air is nitrogen
• Nitrogen must be changed or fixed in order for us to use

19. What is the nitrogen cycle
What is the nitrogen cycle? nitrogen gas
in air (N2)
The nitrogen cycle nitrogen fixation
is the continuous
trapping of nitrogen
gas into compounds
in the soil and its
return to the air.
denitrification
decomposition absorption
nitrate
ammonia nitrite
• Nitrogen is part of the genetic material in all cells Lesson 1 c
• 78% of the air is nitrogen
• Nitrogen must be changed or fixed in order for us to use
• Nitrogen can be fixed by Volcanic act. or lightning

20. What is the nitrogen cycle
What is the nitrogen cycle? nitrogen gas
in air (N2)
The nitrogen cycle nitrogen fixation
is the continuous
trapping of nitrogen
gas into compounds
in the soil and its
return to the air.
denitrification
decomposition absorption
nitrate
ammonia nitrite
• Nitrogen is part of the genetic material in all cells Lesson 1 c
• 78% of the air is nitrogen
• Nitrogen must be changed or fixed in order for us to use
• Nitrogen can be fixed by Volcanic act. or lightning
• Also be fixed by types of bacteria

21. How is matter recycled

22. How is matter recycled
• Renewable resources

23. How is matter recycled
• Renewable resources
• Non-Renewable resources

24. How is matter recycled
• Renewable resources
• Non-Renewable resources
• Using up nitrogen in soil can kill soil

25. How is matter recycled
• Renewable resources
• Non-Renewable resources
• Using up nitrogen in soil can kill soil
• Compost: mixture of dead organic material that
can be used as fertilizer