SAVE MY EXAM 2.1 - CHOOSE

What defines an open ecosystem?

• No exchange of energy

• Energy flows externally

• Continuous matter and energy exchange

• Energy remains within

Which law governs energy conservation?

• Law of entropy

• Second law of thermodynamics

• First law of thermodynamics

• Energy transformation law

Why is energy transfer inefficient?

• Energy stored at higher levels

• Heat loss during transfer

• Photosynthesis absorbs energy

• Nutrient recycling fails

What is the main energy source for ecosystems?

• Biomass

• The Sun

• Consumers

• Decomposers

What process transforms light energy into chemical energy?

• Respiration

• Photosynthesis

• Decomposition

• Energy cycling

Why do trophic levels lose energy?

• Energy remains in producers

• Heat loss during metabolism

• Decomposers recycle energy

• Biomass absorbs energy

How do decomposers support ecosystems?

• By recycling nutrients

• By storing energy

• By reducing biomass

• By enhancing entropy

Why are food chains limited?

• Energy flows endlessly

• Energy loss limits higher levels

• Producers store all energy

• Energy concentrates at the top

What is thermal energy's role in ecosystems?

• Recycled by producers

• Exits the system as heat

• Increases biomass efficiency

• Absorbed by decomposers

Which trophic level is most energy-efficient?

• Apex predators

• Primary producers

• Secondary consumers

• Decomposers