Unit 2B Carbon Cycle

Unit 2 - Carbon Cycle

Standards:

HS-LS2-5: Develop a model to illustrate the role of photosynthesis and cellular respiration in the cycling of carbon among the biosphere, atmosphere, hydrosphere, and geosphere

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• Carbon is an element that is the foundation of organic molecules and can be found both in living and nonliving things, as an element, or as part of a molecule and in any of the four spheres of Earth.

• Carbon has 4 valence electrons & bonds with atoms!

• The same carbon atoms are used REPEATEDLY on Earth and is never created or destroyed, it just cycles between Earth's spheres.

Carbon is an element made of atoms.

Multiple Choice

Why is carbon able to build so many different compounds?

• It has two valence electrons which can bond with itself and other elements.

• It has three valence electrons which can bond with itself and other elements.

• It has four valence electrons which can bond with itself and other elements.

• It has six valence electrons which can bond with itself and other elements.

• A molecule is a group of atoms bonded together.

• An organic molecule is a complex molecule that is primarily made of carbon atoms bonded with other elements and/or other carbon atoms.

• All living things on Earth are composed of organic molecules.

​

​Organic Molecules

Multiple Choice

2.4 - Proteins, nucleic acids, lipids, and carbohydrates are based on which molecule?

• oxygen

• hydrogen

• carbon

• nitrogen

Dropdown

​ Decomposition: ​

Select answer

Combustion: ​

Select answer

Respiration: ​

Select answer

​

Photosynthesis: ​

Select answer

​ Absorption: ​

Select answer

1. Atmosphere - gases in air

2. Biosphere - all life forms

3. Hydrosphere - all water

4. Lithosphere - solid earth

​

​4 Earth Spheres

Multiple Choice

In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.

• burning . . . photosynthesis

• fixation . . . decomposition

• decomposition . . . photosynthesis

• respiration . . . decomposition

• respiration . . . photosynthesis

Carbon is necessary for life!

• Since we cannot make our own carbon, we rely on these molecules to be recycled from other living organisms, the atmosphere and other parts of the Earth's surface.​

Multiple Choice

How does the carbon in grass become part of a lion?

• The lion eats the grass
• Carbon from grass doesn't end up in a lion. 
• The carbon ends up in the lion's food chain. 
• The lion breathes in carbon given out by the plant

Glucose & oxygen are converted to energy, carbon dioxide and water.

​​Cellular Respiration

Sunlight is used to convert carbon dioxide and water into glucose, which contains carbon, and oxygen.

​​Photosynthesis

​Energy and carbon dioxide are released when fossil fuels are burned.

​​Combustion

​Organic matter decomposes, caused by microorganisms, releasing carbon dioxide, methane, energy, water and minerals.

​​Decay

Carbon is cycled mainly through the processes of cellular respiration and photosynthesis, but also through combustion and decay.

The carbon cycle begins with identifying:

• Reservoirs: where matter is stored; largest reservoir is sedimentary rocks (1m GT)

• Residence Times: how long matter stays in a reservoir

• Fluxes: how the matter moves from one reservoir to another

​

Multiple Choice

2.4 - What is considered the largest carbon reservoir?

• terrestrial biosphere

• fossil fuels

• rocks and sediments

• atmosphere

Multiple Choice

Organisms that do not decompose naturally can be buried and become what?

• oxygen

• nutrients

• calcium carbonates

• fossil fuels

Multiple Choice

What are the two main reservoirs for carbon dioxide?

• Ocean, fossil fuels

• Ocean, atmosphere

• Atmosphere, fossil fuels

• Calcium Carbonate, ocean

Multiple Choice

Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

Multiple Choice

What are the end products of cellular respiration? 

• Carbon dioxide, water and ATP energy
• Carbon dioxide, glucose and water
• Oxygen, glucose and ATP energy
• Water, Carbon dioxide and Oxygen

Multiple Choice

If a forest fire occurs, what will happen to the carbon in the forest?

• It will go into the soil

• It will go into the atmosphere

• It will runoff into nearby streams and rivers

• It will be destroyed

Multiple Choice

2.2 - Which process transfers carbon from the atmosphere to the biosphere?

• photosynthesis

• animal respiration

• cellular respiration

• Krebs cycle

Multiple Choice

2.3 - Which part of the environment incorporates carbon into the carbon cycle via water?

• biosphere

• atmosphere

• hydrosphere

• geosphere

Multiple Choice

What kind of organism takes out the most carbon from the atmosphere?

• Plants

• Bacteria

• Animals

• Humans

• Discovered that the majority of the matter from plant growth does NOT come from the SOIL.

• The majority of a plant's mass comes from its uptake of carbon dioxide from the AIR.​

​Jan Baptist van Helmont

Multiple Select

Check all the ways that carbon dioxide is ADDED to the atmosphere.

• Respiration

• Combustion

• Photosynthesis

• Decomposition

Multiple Choice

Where does all the carbon in organisms (living things) originate from?

• Earth's atmosphere

• Rocks

• Water

• Soil

​...Carbon Dioxide, Water and Light to produce Glucose (carbohydrate) and Oxygen.

CARBS are the foundational energy source of all ecosystems!

​

All photosynthesizers use...

Multiple Choice

If the plant population decreased, the amount of carbon dioxide in the atmosphere would _________.

• Stay the same

• Increase

• Decrease

Multiple Choice

2.2 - One way carbon moves from the atmosphere to the biosphere is through a process by which plants use light energy and convert it into biochemical energy. What is this process called?

• glycolysis

• photosynthesis

• respiration

• digestion

Multiple Choice

2.2 - In photosynthesis, six molecules of carbon dioxide react with six molecules of water to produce oxygen and

• fatty acid.

• glucose.

• glycerol.

• fructose.

Multiple Choice

2.2 - Photosynthetic chemical reactions occur in organelles called

• mitochondria

• chloroplasts

• ribosomes

• cytoplasms

Multiple Choice

Producers, like plants, DON'T USE cellular respiration.

• True

• False

Multiple Choice

2.2 - What are the products of photosynthesis?

• glucose and oxygen

• water and oxygen

• glucose and carbon dioxide

• glucose and water

​1. Plant trees & don't burn off forests 2. Consider using solar energy

3. Ride your bike & walk 4. Recycle & avoid plastic 5. Pros/Cons of Electric Cars

Multiple Choice

2.4 - Carbon dioxide levels can be reduced in the atmosphere by:

• reducing carbon emissions from the burning of fossil fuels

• planting more trees and other vegetation

• replacing trees that have been cut down for manufacturing purposes

• All of these.

Multiple Select

Check all the ways that carbon dioxide is REMOVED from the atmosphere.

• Respiration

• Combustion

• Photosynthesis

• Decomposition

Multiple Choice

How does the human body return carbon to the atmosphere in the carbon cycle?

• Waste products

• Photosynthesis

• Cellular respiration

• Formation of glucose

"You will die, but the carbon will not, its career does not end with you. It will return to the soil, and there a plant will take it up again in time, sending it once more on a cycle of plant and animal life."

-Jacob Bronowski

Match

2.2 - The _1_ is reusing _2_ atoms that travel from the _3_ into _4_ in the Earth and then back into the atmosphere over and over again.

• carbon cycle

• carbon

• atmosphere

• organisms

1

2

3

4

• 1

• 2

• 3

• 4

Match

2.3 - The biosphere is necessary for the carbon cycle because it is responsible for much of the _1_ that moves through the carbon cycle. Photosynthetic organisms oxygenate the _2_ and store glucose. Animals breathe the _3_ & eat the glucose and excrete _4_ & CO2 as waste. Carbon is returned to the cycle and powers _5_ once again.

• carbon

• planet

• oxygen

• water

• photosynthesis

1

2

3

4

5

• 1

• 2

• 3

• 4

• 5