Food Chains and Food Webs

3rd Grade

Question 1In this food chain, the arrows are used to show the flow of energy. The grasshopper gets its energy directly from the ----Sun Grass Grasshopper Frog 

A. GrassB. SnakeC. FrogD. Sun

AnswerO A. Grass

Question 2Which statement correctly describes how energy flows in the food chain shown here? Sun Plant Mosquito Bird 

A. From plant to SunB. From snake to mosquitoC. From bird to plantD. From mosquito to bird

AnswerO D. From mosquito to bird

Question 3The squirrel gets its energy directly from ---- Sun Tree Squirrel Hawk 

A. the SunB. the treeC. the other squirrelsD. the hawk

AnswerO B. the tree

Question 4The diagram shows an incomplete food chain. Which of the following would complete the food chain? Sun ________ Insects Frogs Snakes

A. Small fishB. MosquitosC. Green plantsD. Bald eagles

AnswerO C. Green plants

Question 5If the mice are removed from this food chain, which animal population would most likely be affected first? Sun Plant seeds Field mouse Snake Mountain Lion 

A. Plant seedsB. Field miceC. SnakesD. Mountain lions

AnswerO C. Snakes

Question 6

Which of the following is represented in the food chain below? Sun Plants Insects Fish Humans 

A. Evaporation of waterB. Transfer of energyC. Reflection of lightD. Changing of phase

AnswerO B. Transfer of energy

Question 7What is most likely this first thing to result from having fewer field mice in the food chain pictured here? Sun Plant seeds Field mouse Snake Eagle A. The snakes would have to find another food source.B. The plants that make seeds would decrease in number.C. The eagles would have to fly away to a different location.D. The new fish population will decrease.

AnswerO A. The snakes would have to find

another food source.

Question 8 A new fish is introduced in a pond that also eats the plants. What changes would occur in this pond ecosystem?

A. The large fish population will decrease

B. The plant population will decrease.C. The small fish population will

increase.D. The new fish population will

decrease.

AnswerO B. The plant population will

decrease.

Question 9Which of the following correctly shows how energy moves through a food chain?

A. Sun meat eaters plants plant eatersB. Sun plants plant eaters meat eatersC. Sun plant eaters meat eaters plantsD. Sun plants meat eaters plant eaters

AnswerO B. Sun plants plant eaters meat

eaters

Question 10Based on the food chain illustrated below, what effect would most likely be a direct result of increasing the number of fish? Sun Plant Beetle Fish 

A. Beetles would have trouble finding food.B. There would be more kinds of plants.C. The population of beetles would decrease.D. Plants would no longer survive in this

habitat.

AnswerO C. The population of beetles would

decrease.

Question 11

Which of the following uses the Sun’s energy to grow?

A. PlantsB. HumansC. BirdsD. Water

AnswerO A. Plants

Question 12

List two organisms that use the Sun’s energy to survive: 1. _____________________________ 2. _____________________________

AnswerO Any type of plant uses the Sun’s

energy

Question 13

List two organisms eat other animals to survive: 1. _____________________________ 2. _____________________________

AnswerO Any type of meat eater gets its

energy from other animals

Question 14

Use the following words to correctly fill in the food chain: grains, mouse, fox, and Sun. _______________ ______________  _______________ _______________

AnswerO Sun grains mouse fox

Question 15

What is the original source of energy for all organisms in a pond ecosystem?

A. WaterB. PlantsC. Animals

D. Sun

AnswerO D. Sun

Question 16

Which food chain shows the correct flow of energy through a prairie ecosystem?

A. Bird Mouse Plant SunB. Sun Plant Mouse BirdC. Mouse Plant Sun BirdD. Plant Sun Bird Mouse

Answer

Question 17A disease is causing plants not to grow in this habitat. How will this affect the food chain? The number of ---- Sun Plant Small fish Large fish  

A. large fish will increaseB. small fish will increaseC. small fish will decreaseD. sunlight will increase

AnswerO C. small fish will decrease

Question 18

A __________________ shows how energy moves through the environment.

A. decomposerB. listC. graphic chartD. food chain

AnswerO D. food chain

Question 19

A model that shows how food chains overlap is called a _________________.

A. food chainB. organism listC. food webD. predator

AnswerO C. food web

Question 20

An animal that hunts another animal for food is called a _______________________.

A. preyB. consumerC. decomposerD. predator

AnswerO D. predator