Energy Flow in Ecosystems

Multiple Choice

Why is understanding the flow of energy in ecosystems important for studying biology?

• It helps explain how organisms interact and survive.

• It is only relevant for chemistry.

• It has no impact on living things.

• It is mainly about weather patterns.

Multiple Choice

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

• Water

• Sunlight

• Carbon dioxide

• Wind

Multiple Choice

Which factor does NOT affect primary productivity in plants?

• Amount of water available

• Amount of sunlight available

• Carbon dioxide

• Presence of predators

Multiple Select

Which of the following are considered autotrophs?

• Plants

• Algae

• Rabbits

• Some bacteria

Multiple Select

Which of the following organisms can be classified as decomposers or detritivores?

• Vultures

• Earthworms

• Bacteria

• Rabbits

Multiple Choice

Which organism in the food chain shown is a tertiary consumer?

Food chain= seeds   -   mouse    -  snake      -  hawk    -      fox 

(arrows point in direction of energy flow).

• Mouse

• Snake

• Hawk

• Fox

Multiple Choice

According to the ten-percent law, if a producer has 10,000 kcal of energy, how much energy will be available to the secondary consumer?

• 10 kcal

• 100 kcal

• 1,000 kcal

• 10,000 kcal

Multiple Choice

Select all statements that correctly describe the energy pyramid: 1) Most energy is found at the producer level. 2) Energy increases as you move up the pyramid. 3) Less energy is available at higher trophic levels. 4) Top carnivores receive the most energy.

• 1 and 3

• 2 and 4

• 1 and 2

• 3 and 4

Open Ended

Explain the 10% rule in the flow of energy in ecosystems and why it is important for understanding food chains.