The Carbon Cycle

M.BREGAR (DANTE C.S.S.)1

The Carbon Cycle

M.BREGAR (DANTE C.S.S.) 2

What is the Carbon Cycle?Nutrient cycle in which CARBON ATOMS are

RECYCLED through the abiotic and biotic parts of an environment.

Wood burned produces carbon dioxide. The carbon being released had been stored within the plant through photosynthesis.

Any excreted waste can contain large amounts of carbon that can be recycled as fertilizer. Consumers of plants ingest the carbon stored within the plant. The same carbon, originally from wood, becomes apart of the animal back to the plants

CARBON ATOMS

What is the Carbon Cycle?

Consists of two processes in the BIOTIC environment:

PHOTOSYNTHESIS (in AUTOTROPHS)

CELLULAR RESPIRATION (in HETEROTROPHS & AUTOTROPHS)

Autotrophs Organisms having the ability to synthesize their own food

Examples:

Plants & Algae

Autotrophs Organisms that can make their own food, such

as plants which make their food from inorganic substances

Why are autotrophs imporant?

Called producers because they produce chemical energy for an entire ecosystem

Convert inorganic substances & light into organic substances containing CHEMICAL ENERGY (i.e. food)

Heterotrophs

Organisms that do not make their own food

Also known as consumers – they “eat other things”

Ex. Deer, Mushrooms (a decomposer), Rabbits

Heterotrophs

Various types of consumers:

1. Scavengers/Detrivores Feed on dead tissue of organisms (both plans and

animals) Ex. – Vultures, Crows, and Shrimp

Heterotrophs

2. Herbivores Eat ONLY plants Ex. – Cows, Elephants, Giraffes

Heterotrophs

3. Carnivores Eat ONLY meat Ex. – Lions, Tigers, Sharks

Heterotrophs

4. Omnivores Eat BOTH plants and animals Ex. – Bears and Humans

Heterotrophs

5. Decomposers Absorb any dead material and break it down Ex. – Bacteria and Mushrooms

Photosynthesis

Takes place in autotrophs

Photosynthesis

Takes place in autotrophs, specifically in the leaves of green plants

In photosynthesis, plants trap sunlight (energy from the sun) and use it to create food (sugar called glucose)

Key – plants turn light energy into chemical energy

Photosynthesis EquationPhotosynthesis is the process in which plants

make food (sugar).Equation:

Carbon Dioxide + Water + Energy

Sugar + Oxygen

Taken from the environment

Roots absorb water from

soil and transport it to

the leaves

Chloroplasts (located in leaves) trap light energy

from sun

Called Glucose. It is a plants foodStored in body of

a plant

Released back into the air

(waste product)

Reactants Products

Photosynthesis

Explaining Photosynthesis Plants can’t use light energy directly, instead they

must convert it to chemical energy in the process of photosynthesis

This chemical energy is eitherUsed to survive (energy to live)Stored as physical part of the plant (called

starch)

Now a Short Clip(PHOTOSYNTHESIS)

Click icon to add picture

Explaining Photosynthesis

Heterotrophs consume the plant material for this stored chemical energy

Cellular Respiration

Takes place in autotrophs & heterotrophs

CELLULAR RESPIRATION is when food (chemical energy) is broken down to release energy

This is called catabolism or “digestion”.

Sugar (Food) made by plants in photosynthesis is broken down through cellular respiration into an “energy form” which can be used

Now a Short Clip(METABOLISM)

Cellular Respiration takes place in the mitochondria of plant and animal cells

In respiration, Oxygen is combined with Sugar to produce ENERGY, Carbon Dioxide, and Water

The chemical equation for respiration, is essentially the opposite of photosynthesis

Chemical Equation:

Energy + Carbon Dioxide + Water

Sugar + Oxygen

Sugar which is made by producers or eaten

by consumers

Reactants Products

Used to breakdown the sugar. It is

“breathed” in by animals.

Energy is produced which allows the

animal to live

Waste Product of released into the

environment (breathed out)

Waste Product. Often reused, or can be released.

Now a Short Clip(CELL RESPIRATION)

Complementary Processes Cellular Respiration & Photosynthesis are

complementary processes

Carbon Storage

Carbon is continually recycled in living ecosystems, but it can also be stored

Ways of storing carbon:

(1) Inroganic Carbon Storage (non – living)

(2) Organic Carbon Storage (living)

Inorganic Carbon Storage

Storage of carbon atoms in non-living things occurs in 3 ways:

1) Atmosphere Carbon dioxide in the air Contains least stored carbon (0.03%)

2) Oceans Carbon dioxide dissolved in water Used by water plants for photosynthesis

3) Soil Carbon stored in rocks such as limestone Most carbon is stored in soil / rock Can be released when rocks are disturbed

(volcanoes, acid rain)

Limestone & Acid Rain

Organic Carbon Storage

Carbon is stored in the bodies of living things

Organic Carbon Storage

Carbon stored in living bodies is released when the organism dies and decomposes.

Carbon is continually being recycled

Organic Carbon StorageCarbon stored in a body can be turned into

fossil fuels (gas, coal, etc.)

Peat (dead plant material) which gets buried can turn into Coal

Where is all the carbon in our world

Captain Carbon

A Review of The Carbon Cycle

The Carbon Cycle Captain's Log: After floating around for a while and enjoying the fresh air, I became restless and started to search for an adventure. Since I heard that green plants enjoy having carbon dioxide molecules over for company, I thought I'd give it a try!!!!!!

Captain Carbon with 2 of his oxygen buddies. Together they form a molecule called carbon dioxide

Before I knew it, I was converted from being part of a gas, CO2 into a glucose (sugar) molecule.

Photosynthesis Carbon dioxide + water + light energy → sugar + oxygen

Respiration

sugar + oxygen → water + carbon dioxide + energy

Carbon Storage

The Carbon Cycle

The Carbon Cycle

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