Ecosystem and Energy Flow Quiz for 7th Grade

Which of the following best describes an ecosystem?

• A collection of only living organisms
• A natural area with both living and non-living components that interact
• A single type of plant species
• A random group of animals

What makes biotic components different from abiotic components in an ecosystem?

• Biotic components are living organisms
• Abiotic components create the environment
• Biotic components interact and provide life
• All of the above

In an ecosystem, why is an individual organism considered the smallest unit?

• It represents a single species
• It can survive alone
• It forms the basic building block of population interactions
• It always reproduces quickly

What is the primary reason populations of the same species live together?

• They look similar
• They share habitat requirements and can reproduce
• They compete for resources
• They always form large groups

Which nutritional relationship involves both organisms benefiting?

• Predation
• Competition
• Mutualism
• Commensalism

Why is predation important in an ecosystem?

• It helps control population sizes
• It transfers energy between organisms
• It maintains ecological balance
• All of the above

What makes producers crucial in an ecosystem?

• They create their own food
• They form the foundation of the food chain
• They use sunlight for energy
• All of the above

Why can't consumers produce their own food?

• They are too lazy
• They lack chlorophyll
• They depend on other organisms for energy
• They live underground

What happens to energy as it moves through trophic levels?

• Energy increases
• Energy remains constant
• Only 10% of energy transfers between levels
• Energy disappears completely

Which type of organism gets energy directly from sunlight?

• Carnivores
• Herbivores
• Producers
• Decomposers