LT4/5 Unit 6 Recovery

In a food web, what does the direction of the arrow represent?

• The size of the organism

• The flow of energy from one organism to another

• The migration path of the species

• Which animal is the fastest

Which of the following best describes how matter moves through an ecosystem?

• Matter flows in one direction and disappears

• Matter cycles through the environment and living things

• Matter is only found at the top of the food chain

• Matter is created by predators

What happens to the amount of available energy as it moves up from one trophic level to the next in an energy pyramid?

• It increases

• It stays the same

• It decreases

• It doubles at every level

Which organism is always at the base (bottom) of an energy pyramid?

• Apex predators

• Decomposers

• Primary consumers

• Producers

If an arrow points from a grasshopper to a bird in a food chain, which organism is the prey?

• The bird

• The grasshopper

• Both are prey

• Neither is prey

What is the primary source of energy for most food chains on Earth?

• The Moon

• The Soil

• The Sun

• Water

Which term refers to the different levels in a food chain or energy pyramid?

• Energy steps

• Trophic levels

• Animal groups

• Feeding cycles

In a food web, if an arrow points from a mouse to an owl, what is the owl's role?

• Producer

• Prey

• Predator

• Decomposer

Why are there usually fewer organisms at the top of an energy pyramid than at the bottom?

• There is less energy available to support them

• They are smaller in size

• They live longer lives

• They do not need much food

Which of these models shows many interconnected feeding relationships in an ecosystem?

• A food chain

• A food web

• A population graph

• An organism list