Food Chains and Food Webs

Define

Food Chain: A series of steps which illustrates how energy is transferred from one organism to another by eating or being eaten. They also vary in length.

Food Web: A network of food chains that demonstrate the feeding interactions of an ecosystem; very simplified models models because many species aren't represented.

2.

3. Explain how energy flows through this food chain? 

 Energy flows through this food chain in a one-way stream, form primary producers to various consumers. The shark eats the squid; the squid eats the fish; the fish eats the krill, and so on and so forth. 

Chapter 3.2 - Energy, Producers, and Consumers

1. What do autotrophs do during photosynthesis? 

This organism produces "food" as well as store energy in forms that make it available to other organisms that eat them. 

     2.  Can some organisms survive without energy from the sun? Explain your answer.

Yes, some organisms can survive without energy from the sun. Researchers reveled that these organisms depend on primary producers that harness chemicals energy from inorganic molecules (hydrogen sulfide). They carry out a process called chemosynthesis (chemical energy is used to produced carbohydrates).

Bart Simpson Worksheet- Identify the Control and Variables

Smithers’ thinks that a special juice will increase the productivity

of workers. He creates two groups of 50 workers each and assigns

each group the same task (in this case, they're supposed to staple

a set of papers). Group A is given the special juice to drink while

they work. Group B is not given the special juice. After an hour,

Smithers counts how many stacks of papers each group has made.

Group A made 1,587 stacks, Group B made 2,113 stacks.

Identify the:

1. Control Group

Group B

2. Independent Variable

Special Juice

3. Dependent Variable

Productivity of Workers

4. What should Smithers' conclusion

be?

The special juice doesn't increase the productivity of workers 

5. How could this experiment be

improved?

Make sure they have the same amount of time; fatigue levels are similar; give before.

Chapter 1.1 - What is Science?

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