Food Chains

What would happen if there was a forest fire and the grass died?

• The deer population would decrease

• The deer population would increase

A new fish that also eats plants is introduced into a pond. What changes would occur to this pond ecosystem?

• The large fish population will decrease.

• The plant population will decrease.

• The small fish population will increase.

• The new fish population will decrease.

The arrows in the diagram represent -

• an increase in size

• the flow of energy

• how they move

• decreasing temperature

Which of these organisms would receive energy from the snake?

• Plant
• Rabbit
• Mouse
• Hawk

What is the effect of removing snake from a food chain?

• The Hawk would perish or decrease.

• The grass will not grow.

• The rabbit population will decrease

Based on the food chain illustrated below, what effect would be the most likely direct result of increasing the number of fish?

• Beetles would have trouble finding food.

• There would be more kinds of plants.

• The population of beetles would decrease.

• Plants would no longer survive in this habitat.

The diagram shows a grassland food chain. If the mice are removed from this food chain, which animal population would most likely be affected first?

• Plant seeds

• Field Mice

• Snakes

• Mountain Lions

What is most likely the first thing to result from having fewer field mice in the food chain pictured here?

• The snakes would have to find another food source.

• The plants that make seeds would decrease in number.

• The eagles would have to fly away to a location.

• The mice would eat many more kinds of seeds.

Which of these completes the food chain correctly?

• a rock

• a fox

• a plant

• an egg

A disease is causing plants not to grow in this habitat. How will this affect the food chain? The number of –

• large fish will increase

• small fish will increase

• small fish will decrease

• sunlight will increase