Relationships in an Ecosystem

What do consumers do in the food chain?

• They obtain energy from other organisms. 
• They break down dead plant and animal material. 
• They use sunlight to make food. 
• They are parasites of plants. 

A population of small fish and a population of small squids eat the same type of krill (a type of plant) in the same ecosystem. Krill is the main source of food for both the fish and squid. If the squid grows faster than the fish population, what will most likely happen to the fish population? 

• The fish population will stay the same size. 
• The fish population will start to grow faster. 
• The fish population will get smaller or even die out. 
• The fish population will start to eat more krill than the squids. 

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What is the relationship between the Sun, plants, and animals in a food web?

• The Sun provides energy for both plants and animals to make their own food. 
• The Sun provides energy for plants to make their own food, and animals eat plants or other animals. 
• The Sun provides light so animals can see which plants to eat. 
• The Sun provides heat energy for animals to survive, but not plants. 

Which organism do the owl and the weasel compete for in the food web?

• Hawk
• Spider
• Grasshopper
• Shrew

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Which of the following is a herbivore?

• cricket
• frog
• hawk
• shrew

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A consumer that hunts is called:

• a producer.
• an omnivore.
• a predator.
• a herbivore.

A frog eats a fly. The frog and fly are demonstrating ________.

• mutualism
• competition
• predator/prey
• parasitism

Grass is considered a ...

• consumer
• producer
• decomposer
• composers

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Temperature, light, air, water, and soil are all  _____  parts of the environment

• alive
• biotic 
• abiotic
• living

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What is an example of a biotic factor?

• skunk
• rocks
• soil
• water

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