Living Systems and Laws of Conservation

Living Systems and Laws of Conservation

Ms. M

Energy Flow

• Energy enters the system as sunlight converted by producers.

• Producers are eaten by consumers, which are then eaten by another consumer and so on.

• Movement of energy can be shown as food chains, food webs, and energy pyramids.

Multiple Choice

What is the ultimate source of energy for most organisms?

• The Sun

• The Earth

• Plants

• Producers

Food Chain

A food chain is linear. It shows a direct path a energy from a producer to the next consumer.

Multiple Choice

The lionesses usually do the hunting for the pride at night.  They are typically classified as this:

• herbivores
• producers
• carnivores
• vegetarians

Food Web

Shows overlapping food chains within the same ecosystem.

Multiple Choice

Use the diagram to answer the question.
The Mayfly is a food source for which 3 organisms?

• Frog, Dragon Fly and snake
• Frog, trout and dragon fly
• Frog, salamander and trout
• Frog and phytoplankton

Energy Pyramid

• Shows the amount of energy that moves from one feeding level to another in a food web.

• Only about 10 percent of the energy at one level of a food web is transferred to the next higher level.

Multiple Choice

In this Food Web Pyramid what is the proper name for the organisms above the producer level at the bottom.

• herbivores
• consumers
• carnivores 
• omnivores

Multiple Choice

True or False. In this Food Web Pyramid the consumers on each level only get about 10 percent of energy that the plants have stored.

• True
• False

Multiple Choice

What is the best explanation for an energy pyramid?

• It shows the FLOW of energy from one organism to the next. 
• It shows HOW much energy flows through a food web
• It shows the MEMBERS in a single organism

Multiple Choice

The energy transfer from a lower trophic level to the next highest level is roughly

• 1%

• 10%

• 100%

• 1000%

How does this principle follow the law of conservation?

Multiple Choice

Which of the following correctly shows an energy pyramid?

• A

• B

• C

• D

Multiple Choice

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%
• 90%
• 10%
• 20%