UNIT #1 Study Guide

Why is it important to understand how different organisms are connected in a food web?

• To determine how the dinosaurs' diet would have changed after the asteroid impact.

• To see how the extinction of certain species could have disrupted the food web.

• To prove the asteroid impact did not affect the food web.

• To learn which plants dinosaurs preferred after the asteroid impact.

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Match each term with its correct description: Food web

• A network of interconnected food chains in an ecosystem.

• A type of plant that dinosaurs ate.

• A fossilized remain of a dinosaur.

• Energy from the sun.

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What are some disadvantages of global warming? (Select all that apply):

• Melting polar ice caps causing rising sea levels

• More severe weather events

• Longer beach seasons

• Changes in ecosystems affecting wildlife

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In the Bloom Busters activity, what caused harmful algal blooms in the ecosystem?

• Excessive nutrients entering waterways

• A decrease in plant populations

• Too many decomposers

• Low carbon dioxide levels

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If there were no plants in a pond ecosystem, what would help maintain a healthy environment for animals like sunfish?

• Remove decomposers from the ecosystem

• Add predators to control sunfish populations

• Use an oxygen filter to balance oxygen levels

• Add more carbon dioxide

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What role do decomposers like fungi and worms play in an ecosystem?

• They provide energy to consumers.

• They break down dead materials and return nutrients to the soil.

• They absorb sunlight to create food.

• They compete with plants for soil nutrients.

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Why must scientists ensure their tests are “fair” when conducting experiments?

• To make the experiment quick and simple

• To control which factors influence the results

• To guarantee consistent results

• To use fewer materials

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What do plants need to grow and survive? (Select all that apply):

• Sunlight

• Water

• Nutrients

• Air

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In a food chain, which type of organism creates its own energy from sunlight? What type gets energy by eating other organisms?

• Producers create energy; consumers get energy by eating others.

• Consumers create energy; producers get energy by eating others.

• Decomposers create energy; producers get energy by eating others.

• Predators create energy; prey get energy by eating others.

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What does a food chain represent?

• The flow of water

• The transfer of energy and nutrients

• The number of herbivores

• The lifespan of producers

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