Energy Cycles

The Cycling of Energy

Multiple Choice

What are the reactants of Photosynthesis?

• H2O and C6H12O6

• O2 andCO2

• O2 and C6H12O6

• CO2 and H20

​Vocabulary Items

​Carbon pool- any where carbon can be found, such as plants

Stocks- another way to say carbon pool, also called resevoirs

Carbon flux- The process by which carbon moves from one pool to another

Fossil Fuels- a natural fuel formed from the remains of living organisms

Carbon sequestration- the process of moving atmospheric carbon into other pools

Carbon Sink- a pool that absorbs more carbon than it releases

Carbon Source- a pool that releases more carbon than it stores

Biomass- organic matter

Combustion- the process of burning something

Fill in the Blank

What is an example of a carbon sink?

There is a fixed amount of carbon on earth (closed environment), most of it has been stored for hundreds of thousands of years.

The burning of fossil fuels is releasing stored carbon into the atmosphere

​

​Carbon on Earth

Deforestation

Coal, oil, and gas combustion

Human activities emit 60 or more times the amount of carbon dioxide released by volcanoes each year.

Volcanic eruptions

Natural

​Anthropogenic- human influenced

Carbon Sources

Multiple Select

In what ways does photosynthesis play a role in the carbon cycle?

• Plants can act as a carbon sink

• Plants take up oxygen and produce carbon dioxide

• Plants take up carbon dioxide to produce oxygen

• Plants play no role in the carbon cycle

Multiple Choice

Which option best explains the interrelated nature of photosynthesis and cellular respiration?

• The products for cellular respiration are the products for photosynthesis

• The reactants for photosynthesis are the products of cellular respiration

• There is no connection

• The reactants of photosynthesis are the reactants of cellular respiration

The Water Cycle

Solvent- water is a universal solvent, ability to dissolve many substances

Moderate temperature- large bodies of water are able to moderate the temperature of nearby land, this is due to waters high heat capacity

Cohesion- water molecules ability to stick to itself

Adhesion- waters ability to stick to other molecules

Expansion- water molecules for hexagonal crystalline structures during freezing which causes an increase in size

Properties of Water

Multiple Choice

Do plants have a role in the water cycle?

• yes

• no

Multiple Choice

How does water get from the ground, or surface back into the atmosphere?

• Percipitation

• Photosynthesis

• Evaporation

• Condensation

Plants in the water cycle

Plants absorb water from soil, the water moves from the roots, through the stems, to the leaves. Once it reaches the leaves, some of it escapes through the stomata.

This is called transpiration

Multiple Choice

What is the vessel system that carries water through the plants?

• Phloem

• Cambium

• Meristem

• Xylem

Multiple Choice

What is evapotranspiration, in science?

• A spelling bee word

• The process of water vapor being released from plants and soil into the atmosphere

• The process of water vapor being released from the soil into the atmosphere

• The process of water vapor being released from the ocean into the atmosphere

Producers- the basis of the food web, organisms that can make their own food

Consumers- organisms that must eat other organisms to survive

Decomposers- organisms that consume dead organic matter

Trophic Level- levels of an ecosystem, grouping together organisms with the same role

Only 10% of the energy stored in biomass moves from one trophic level to the next

​Energy flow in ecosystem

Multiple Choice

How much energy moves from one trophic level to the next?

• 5%

• 10%

• 15%

• 20%

Multiple Choice

What would a herbivore, such as a beetle, be considered?

• primary consumer

• producer

• apex predator

• secondary consumer

Multiple Choice

Are most ecosystems food webs or food chains?

• Food webs

• Food chains

Match

Match the following

• Alligator

• Cordgrass

• frog

• grasshopper

apex predator

producer

tertiary consumer

primary consumer

• apex predator

• producer

• tertiary consumer

• primary consumer

Multiple Choice

Which of the following is not a carbon source?

• Volcanoes

• Deforestation

• Plants

• Fossil fuel combustion

Multiple Choice

How do animals actively return carbon to the atmosphere?

• photosynthesis

• cellular respiration

• formation of glucose

• decomposition of organic matter

Link to peer reviewed article

https://www.climate.gov/news-features/climate-qa/which-emits-more-carbon-dioxide-volcanoes-or-human-activities