CHAPTER 2 : ECOSYSTEM

How do we use Earth's resources every day?

• raise crops
• build homes
• store garbage
• all of the above

How are people trying to restore Earth's natural resources?

• covering landfills with soil and planting grasses
• planting trees
• creating parks for wildlife
• all of the above

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What are the 3 R's when taking care of our environment?

• restore, rocks, rebellion
• reduce, reuse, recycle
• retake, recycle, recap
• reteach, restore, recycle

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A ______________ is a group of organisms of the same species that live in the same habitat.

• ecosystem

• community

• niche

• population

The main source of energy for producers.

• The sun

• Water

• Glucose

• Carbon dioxide

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An organism that eats other organisms.

• host

• parasite

• consumer

• decomposer

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Estimate the number of hawk if the grasshopper is totally gone?

• Decreases

• Increases

• No change

• Extinct

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Name the secondary consumer from the food web.

• Herring, otter and seal

• Pollock, herring and achovies

• Otter, dolphin and seal

• Pollock, dolphin and anchovies

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Look at the diagram of the food web. The arrows means “eaten by.”

What will happen if the number of snakes goes down?

• The owl will eat the grass

• The number of frogs will go down

• The hawk and owl will have less food

• The number of mice and grasshoppers will go up.

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Cattle egrets eat the insects stirred up by cattle when they are grazing. The cattle are unaffected, while the birds gain food. This is an example of:

• Parasitism

• Mutualism

• Commensalism

• Fortknightism