Ecosystem Interactions and Energy Transfer

The video tutorial covers the principles of ecology, focusing on the flow of energy in ecosystems. It defines ecology and describes the levels of biological organization, from organisms to the biosphere. The tutorial explains how energy flows through ecosystems, starting with producers and moving through various consumer levels. It introduces food chains, trophic levels, and the rule of 10% energy transfer. The video also discusses ecological pyramids, including energy, biomass, and number pyramids, illustrating the decrease in energy and biomass as one moves up the trophic levels.

What is the scientific study of interactions among living things and their environment called?

• Biology

• Ecology

• Geology

• Astronomy

Which of the following is the largest level of biological organization?

• Organism

• Biosphere

• Population

• Community

Which of the following is an example of an abiotic factor in an ecosystem?

• Bacteria

• Rocks

• Animals

• Plants

What is the main source of energy for life on Earth?

• Water

• Sunlight

• Geothermal heat

• Wind

Which type of organism is capable of producing its own food using sunlight?

• Omnivores

• Herbivores

• Carnivores

• Autotrophs

What type of consumer eats both plants and animals?

• Herbivore

• Carnivore

• Omnivore

• Detritivore

In a food chain, what is the term for each step that represents a level of energy transfer?

• Energy level

• Trophic level

• Food level

• Chain level

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

• 50%

• 20%

• 10%

• 5%

Which type of ecological pyramid shows the relative amount of energy available at each trophic level?

• Energy pyramid

• Food pyramid

• Pyramid of numbers

• Biomass pyramid

What happens to the majority of energy as it moves up trophic levels?

• It is lost as heat

• It is stored as biomass

• It is converted to water

• It remains constant