ECOSYSTEMS

Food Chains & Energy Transfer

= Assume that cows eat grass. If grass starts to die, what might be expected to happen to the cow population? (5 points)

What is a habitat? Select an anima= l and describe its habitat. (10 points)

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In order to survive, all organisms need; (5 points)

A).= roots, leaves, and stems

B).= eyes, nose, and ears

C).= light, soil, and nutrients

D).= food, water, air

What is the role of a producer in a food chain? (5 points)

A).= preys on animals

B).= eats decayed animals

C).= makes food

D).= eats plants

Which list below best shows how energy moves in a food chain? (5 points)

A). grass &n= bsp; cow= s &= nbsp; humans &= nbsp; sun

B). sun grass &= nbsp; cows &= nbsp; hu= mans

C). humans cows &= nbsp; grass &= nbsp; &nbs= p; sun

D). cows = grass &= nbsp; sun &= nbsp; &nbs= p; humans

Base your answers to the next two questions on the food chain below.

Green plants = Insects &= nbsp; Frogs &= nbsp; &nbs= p; Snakes

In this food chain, the green plan= ts are? (5 points)

A). producers

B). predators

C). decomposers

D). habitats

The frogs in this food chain get t= heir energy directly from; (5 points)

A). eating the insects

B). being eaten by the snakes

C). eating other frogs

D). eating green plants

Describe the process of photo= synthesis. Use a drawing and then write a written explanation. (15 points)

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Use the food chain below to answer the next two question= s.

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Describe how the organisms in the fo= od chain all rely upon each other. (5 points)

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Use the following terms to label the organisms in the fo= od chain above: producer(s), carnivore(s), herbivore(s), and consumer(s). (5 points)

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Whi= ch population would most likely decrease if the number of mice greatly increas= ed? Why? (5 points)

A).= green plants

B).= mice

C).= snakes

D).= hawks

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65 million years ago during the time when the dinosa= urs roamed the Earth, a huge rock from space crashed into Earth. The crash threw great clouds of du= st into the air. The dust remain= ed in the air for several years and prevented the suns rays from reaching the ear= th. Scientists have since concluded th= at dinosaurs died soon after the big crash.&n= bsp; Based upon your knowledge of food chains, why do you think the dinos= aurs died? (15 points)

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All organisms carry out basic life processes. Life processes include moving, gro= wing, and making more organisms of the same kind. All life processes require energy.= Different kinds of organisms get e= nergy in different ways. How do the organisms in the diagram below acquire their energy? (15 points)

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&= nbsp; &nbs= p;

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