Food Web and Energy Pyramids

Food Web and Energy Pyramids

Review

Producer

Also known as an autotroph.

Makes its own food.

Multiple Choice

What is another word for a producer?

• Animal

• Heterotroph

• Autotroph

• Bug

Photosynthesis

Process plants/producers/autotrophs use to make food.

Multiple Choice

Which of these is an autotroph?

Consumers

Anything that consumes or eats food to get energy.

Also known as a heterotroph.

Multiple Choice

What is another word for a consumer?

• heterotoph

• plant

• producer

• autotroph

Heterotrophs

All animals are heterotrophs.

Multiple Choice

Which of these is a heterotroph?

Decomposers

Eat dead stuff

Will eat dead plants or animals

Fungus and bacteria are the main examples.

Food web

Show more interactions than in a food chain.

Usually leaves out decomposers cause things can get messy.

Energy pyramid

Shows two things.

It compares the population of each trophic (energy) level and shows the amount of energy in each trophic level.

Multiple Choice

What's another word for trophic?

• warm weather

• biome

• energy

• joules

Trophic levels

Only 10% of the energy of each trophic level actually makes it to the next level.

The other 90% is lost as heat to the environment.

Energy in a food web

How much energy a consumer gets depends on which organism they are eating.

If they are eating primary consumer, they are getting more energy from that trophic level than if they ate something that was a secondary consumer.

Multiple Choice

How much energy gets moved to the next trophic level?

• 100%

• 10%

• 90%

• .1%

Multiple Choice

In the following food chain, how much energy would the snake get if the grass's trophic level started with 50,000 kcal?

• 5,000 kcal

• 500 kcal

• 50 kcal

• 5 kcal

Poll

Which of these terms are you still unsure about?

• Autotroph/Heterotroph

• Producer/Consumer

• 10% Rule

• Energy pyramid

• Herbivore / Omnivore / Carnivore