Ecosystem and Energy Quiz

Which of the following is a producer in an ecosystem?

• Grass

• Lion

• Eagle

• Mushroom

Which organism breaks down dead plants and animals into simpler substances?

• Decomposer

• Herbivore

• Producer

• Omnivore

Which of these is an example of an omnivore?

• Human

• Cow

• Tiger

• Snake

What is the primary source of energy for most ecosystems?

• Sunlight

• Wind

• Water

• Heat from Earth's core

In a food chain, which level has the most available energy?

• Producers

• Primary consumers

• Secondary consumers

• Apex predators

Why does energy decrease at higher trophic levels?

• Energy is used for life processes and lost as heat

• Energy is destroyed

• Energy changes into matter

• Higher levels store more energy

What is bioaccumulation?

• Build-up of toxins in an organism over time

• Increase of population size

• Transfer of energy between trophic levels

• Production of oxygen in photosynthesis

Which statement best describes biomagnification?

• Toxins become more concentrated in higher trophic levels

• Toxins become weaker as they move up the food chain

• Toxins disappear after one trophic level

• Only producers store toxins

What is the main function of photosynthesis?

• Convert light energy into chemical energy in glucose

• Break down food to release energy

• Produce oxygen for animals

• Absorb carbon dioxide and turn it into heat

Which is the correct word equation for photosynthesis?

• Carbon dioxide + Water → Glucose + Oxygen

• Glucose + Oxygen → Carbon dioxide + Water + Energy

• Water + Oxygen → Carbon dioxide + Glucose

• Carbon dioxide + Glucose → Water + Oxygen