Assignment-19 Flow of Energy in Ecosystems

Match the following. Match the items in the left column to the items in the right column.

1. bacteria and fungi that break down dead matter 2. line of plants and animals that shows the order in which organisms are eaten 3. a diagram that shows the connections among food chains in an ecosystem 4. related to or possessing motion 5. organisms that eat primary consumers 6. organisms that eat producers 7. something possible; ability to go into action or perform work

About how much energy is transferred between a producer and primary consumer?

10% of the original energy from the Sun is transferred

A plant absorbs energy from the sun. Where does the energy go from there?

All of the energy is used by the plant.

During spring, when Earl's crops were plentiful, he noticed an increased number of rabbits. At night, he also heard an increased number of howls from the coyotes. What do you think will happen when winter comes around and the crops die out?

Both the rabbit and coyote population could decrease because the original food supply decreased.

What is the definition of energy?

It is the ability to do work.

The person holding the bow and arrow has now let go. The arrow shoots forward toward its target. What type of energy is being described?

Kenetic

Life cycles recycle matter and help to create balance on Earth because _____.

Living organisms are dependent on other living organisms to survive.

Living organisms that are able to make their own food are _____.

Producers

Trace the flow of energy by numbering the following events from start to finish.

Step 1: The sun emits energy. Step 2: Plants absorb energy from the sun and use it for photosynthesis. Step 3: A rabbit eats the plants and uses the energy for growth and respiration. Step 4: A fox eats the rabbit and uses the energy for growth and respiration. Step 5: The fox dies and is decomposed.

Most energy in an ecosystem comes originally from _____.

The sun

Which of the following is an example of energy changing from one form to another?

a fire

Mr. Jones, the science teacher, tells his students that energy cannot be created; it must be captured from the environment. He is talking about the _____.

first law of thermodynamics

Picture a person standing with a drawn bow and arrow. He is aiming it at a bull's eye target. What type of energy is being described?

potential

According to the second law of thermodynamics, heat energy released by an organism is _____.

released into the environment and unusable

You are a _____ consumer if you feed on secondary consumers.

tertiary

Select all the statements that apply. A food chain or food web can provide good information like _____.

the types of food that are best for you to eat the flow of energy in an ecosystem

Ecosystems usually become balanced by natural controls, including natural selection. A balanced ecosystem is one in which _____.

there are an equal number of organisms at all levels of the food chain.