Energy Flow in Ecosystems

This video tutorial covers the flow of energy in ecosystems, emphasizing the role of the sun as the primary energy source. It explains how producers, or autotrophs, convert sunlight into glucose through photosynthesis, which is then transferred to various levels of consumers. The concept of the 'rule of ten' is introduced, highlighting that only 10% of energy is passed to the next trophic level. Different models like food chains, food webs, and trophic pyramids are used to illustrate energy flow. The video concludes with examples of energy calculations, reinforcing the understanding of energy distribution in ecosystems.

What is the ultimate source of energy for most ecosystems?

• The wind

• The moon

• The ocean

• The sun

What process converts light energy into glucose and oxygen in producers?

• Glycolysis

• Photosynthesis

• Fermentation

• Cellular respiration

What term is used to describe organisms that make their own food?

• Heterotrophs

• Decomposers

• Autotrophs

• Carnivores

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

• 90%

• 10%

• 25%

• 50%

Which type of consumer eats only plants?

• Omnivores

• Carnivores

• Detritivores

• Herbivores

In a food chain, which direction does the arrow point?

• From the omnivore to the herbivore

• From the consumer to the producer

• From the producer to the consumer

• From the decomposer to the producer

Which type of consumer eats both plants and animals?

• Detritivores

• Herbivores

• Carnivores

• Omnivores

What is the term for the top predators in a trophic pyramid?

• Primary consumers

• Secondary consumers

• Decomposers

• Apex predators

If a producer has 1000 kilocalories of energy, how much energy will a primary consumer obtain?

• 10 kilocalories

• 900 kilocalories

• 100 kilocalories

• 500 kilocalories

In a trophic pyramid, which level has the most available energy?

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Producers