7U3L4 Energy Pyramids

Energy Pyramids

 7.MS-LS2-3. Develop a model to describe that matter and energy are transferred among the living and nonliving parts of an ecosystem and that both matter and energy are conserved through these processes.

Your goal is to get at least 7,000 points!

Do your best! You can take notes in your notebook to help! :)

So far we have learned:

• How to diagram how energy flows with a food chain.

• How to diagram how energy flows with a food web.

• Today we will learn how to diagram how energy flows with an energy pyramid.

Quick Review...

Food Chains

• show a series of events where one organism eats another in order to get energy.

• We model a food chain by showing the organisms with arrows between them in the direction that the energy flows.

Food Webs

• have a bunch of overlapping food chains

• are more complex than food chains

• are more realistic than food chains.

Let's Check What You Know!

Multiple Choice

This diagram is a model of which of these?

• food web

• food pyramid

• food chain

• life cycle

Multiple Choice

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• It shows how sunlight flows within an ecosystem.

• They show what direction the energy is flowing between organisms.

• They represent how water is transferred within a habitat.

Multiple Choice

Why might an organism have more than one arrow coming from them in a food web?

• More than one organism may eat them. 
• They may eat more than one other organism. 
• This organism gets its energy from multiple sources. 
• They have no resources available to them.

Multiple Choice

Food of almost any kind can be traced back to what?

• the sun

• animals

• plants

• soil

How did you do?

If you didn't do very well then perhaps you should go review the Kahoot on Food Webs

We already know:

• Energy comes from the sun and is taken in by plants.

• This process is called photosynthesis.

• Animals then eat the plants to get energy

• Some animals then eat the other animals to get energy

• This creates a food chain!

New Vocabulary (for the stuff we already know!)

• Producers - the plants that produce food from the sun's energy!

• Consumer - the animals that eat (or consume) food. This food can be plants or animals

• Herbivores - these are animals that eat only plants. They are also known as Primary consumers because they eat the first level of food.

• Carnivores - these are animals that eat only other animals (carne = meat in english)

• Omnivores - these are animals that eat plants OR animals

Energy Pyramid

Open Ended

What are three things you see In this picture?

Multiple Choice

Where are producers in the energy pyramid?

• Top

• Middle

• Bottom

Multiple Choice

Look carefully at this diagram. Do you think there are more producers or more primary consumers?

• More Producers

• More Primary Consumers

How is the Energy Pyramid Organized?

• By different trophic levels

• The feeding position in the food chain determines what trophic level something is on.

• Amount of energy available decreases (goes down) from the lower to the higher trophic levels.

Multiple Choice

Producers make their own food with energy from the sun. Which level of this energy pyramid represents producers?

• 1

• 2

• 3

• 4

• 5

Multiple Select

Consumers cannot make their own food and must get energy by eating other organisms. Which levels contain consumers?

• 1

• 2

• 3

• 4

• 5

Multiple Choice

Primary consumers are herbivores that only eat plants. Which level of the energy pyramid represents primary consumers?

• 1

• 2

• 3

• 4

• 5

Multiple Choice

An apex predator is an animal that doesn't have other animals that eat it! It's the top of the food chains. Which level of the energy pyramid represents the apex predator??

• 1

• 2

• 3

• 4

• 5

Decomposers

• Garbagemen of the ecosystem!

• They are the most important part of a food web!

• Things like worms, fungi, and bacteria break down the dead organisms to return nutrients back to the environment.

The amount of useful energy in the pyramid decreases by 90% each time you move up the pyramid

Open Ended

Only 10% of the energy gets transferred to the next animal. Brainstorm where you think this energy may go. What is one idea?

90% of the energy from each level is used by:

• an animal's metabolic processes

• running

• eating

• finding mates

• escaping danger

• daily living

• given off to the environment as heat

Let's check what you have learned...

Multiple Choice

About what percent of energy is passed on from one organism to the next on an energy pyramid?

• 100 percent of all energy gets passed

• 45 percent of all energy gets passed

• 10 percent of all energy gets passed

• 0 percent of all energy gets passed

Multiple Choice

In this energy pyramid, what is the proper name for ANY ORGANISM ABOVE THE PRODUCER LEVEL?

• decomposers

• consumers

• producers

• omnivores

Multiple Choice

If only 10% of an organism's energy is available for the next trophic level, what happens with the other 90% of the energy?

• It is destroyed after it is used up.

• It is used for life processes or lost as body heat.

• It remains for the next trophic level IF the predator consumes ALL of the organism.

• It is lost completely as body heat.

Multiple Choice

True or False. In this energy pyramid, the consumers on each level only get about 10 percent of energy that the trophic level before it has stored.

• True

• False

Multiple Choice

A pyramid shape is used to show the amount of available energy at each trophic level because...

• energy decreases as you go up the food chain, just like the pyramid shape gets smaller as you go up.

• energy increases up the food chain just like the pyramid shape gets smaller as you go up.

• energy amounts are the same at each trophic level

Did you get at least 7,000 Points?

If not, try the Quizizz again to get full credit! You can try as many times as needed to get full credit!