Energy Flow in Ecosystems

What is the law that states the total amount of energy in a system never changes?

• Law of Thermodynamics

• Law of Conservation of Energy

• Law of Motion

• Law of Gravity

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What is the primary source of energy for most living things on Earth?

• The Moon

• The Sun

• The Ocean

• The Wind

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How do producers obtain energy?

• By consuming other organisms

• By transforming solar energy into food

• By absorbing nutrients from soil

• By decomposing organic matter

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What is the term used to describe the movement of energy through living systems in a one-way direction?

• Energy Cycle

• Energy Flow

• Energy Loop

• Energy Chain

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What is the primary role of producers in an ecosystem?

• They consume other organisms for energy.

• They decompose dead material.

• They produce their own food.

• They compete with other producers for sunlight.

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Which of the following is an example of a herbivore?

• Snake

• Rabbit

• Hawk

• Lion

What distinguishes a carnivore from an omnivore?

• Carnivores eat only plants.

• Carnivores eat both plants and animals.

• Carnivores eat only other animals.

• Carnivores decompose dead organisms.

How do decomposers contribute to an ecosystem?

• By producing their own food.

• By consuming only plants.

• By breaking down dead material for energy.

• By competing with other decomposers.

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What is the root word "auto" in autotrophs indicative of?

• Feeding

• Self

• Other

• Plant

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What percentage of the Sun's energy absorbed by plants is transferred to the consumers at the next feeding level?

• 10%

• 50%

• 90%

• 100%

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