Energy Transfer and Trophic Levels

The video tutorial by Mr. Smees covers trophic levels and the 10% rule, explaining how energy and matter flow through ecosystems. It emphasizes the conservation of matter and energy, using examples like photosynthesis and food webs. The tutorial details how energy is transferred and lost as heat, illustrating the 10% rule with examples. It also covers biomass and energy calculations, providing practice questions to reinforce learning.

What are the two main topics covered in this lesson?

• Trophic Levels and the 10% Rule

• Biogeochemical Cycles and Food Webs

• Energy Conservation and Matter Flow

• Photosynthesis and Respiration

Which law states that energy is never created or destroyed, only transformed?

• Law of Energy Efficiency

• First Law of Thermodynamics

• Second Law of Thermodynamics

• Law of Conservation of Mass

What happens to energy when it is transferred from one organism to another?

• It increases in amount

• It is conserved but some is lost as heat

• It is destroyed

• It is completely lost

What shape is used to represent the decrease in available energy at each trophic level?

• Circle

• Pyramid

• Triangle

• Square

What percentage of energy is typically transferred from one trophic level to the next?

• 5%

• 10%

• 50%

• 25%

What is biomass in the context of trophic levels?

• The amount of sunlight absorbed by plants

• The number of organisms at a trophic level

• The total mass of all living things at a trophic level

• The total energy at a trophic level

If there are 95,000 joules at the producer level, how much energy is available at the primary consumer level?

• 9 joules

• 9,500 joules

• 95 joules

• 950 joules

How much biomass can be supported at the secondary consumer level if there are 1,000 kg of producers?

• 100 kg

• 0.1 kg

• 10 kg

• 1 kg

Why can a large forest only support a small number of wolves?

• Forests have limited resources

• Energy decreases at each trophic level

• Wolves require a lot of space

• Wolves are solitary animals

Calculate the energy available to a tertiary consumer if plants produce 100,000 joules of energy.

• 10,000 joules

• 1,000 joules

• 10 joules

• 100 joules