Aquatic Food Web Worksheet

What would MOST LIKELY happen if insects were removed from the food web?

• The population of large fish would increase.

• The population of small fish would increase.

• The population of large plants would increase.

• The population of small plants would increase.

A food chain was created using the passage food web, as shown. Which TWO errors were made when creating the food chain?

• The Sun should be at the start of the food chain.

• The grasshopper consumes flower seeds, not grasses.

• A decomposer should be at the start of the food chain.

• The food chain is missing a consumer between the grasshopper and hawk.

• The direction of the flow of energy from producers to consumers is incorrect.

Directions: The picture shows a food web. Use the picture to answer any questions that follow. Which organism in the food web is a producer?

• Grasshopper

• Grass

• Hawk

• Snake

If all the grass in the food web disappeared, which group of animals would be affected first?

• Hawks and foxes

• Grasshoppers and rabbits

• Snakes and sparrows

• Mice and frogs

Which of the following tables is correct about the transfer of matter and energy in an ecosystem?

• Herbivore: mostly animals; Carnivore: both plants and animals; Decomposer: mostly animals; Omnivore: wastes and dead animals

• Herbivore: both plants and animals; Carnivore: wastes and dead animals; Decomposer: mostly plants; Omnivore: mostly animals

• Herbivore: wastes and dead animals; Carnivore: mostly plants; Decomposer: mostly animals; Omnivore: both plants and animals

• Herbivore: mostly plants; Carnivore: mostly animals; Decomposer: wastes and dead animals; Omnivore: both plants and animals

Which of the following is NOT a quality of a river environment that helps channel catfish to thrive?

• It has a lot of salt in the water.

• It has a hard, shallow bottom.

• It has many small food animals.

• It has many safe places to hide.

Carly was given two ecosystems to compare for a class assessment. Her task is to determine what two ecosystems are being compared. Which two ecosystems best fit the descriptions in the table above?

• Ecosystem A is an ocean and Ecosystem B is an estuary.

• Ecosystem A is an estuary and Ecosystem B is an ocean.

• Ecosystem A is a marsh and Ecosystem B is a pond.

• Ecosystem A is a pond and Ecosystem B is a marsh.

Where does energy enter into this food web?

• skunks and wolves

• song birds, insects, and rodents

• ferns, trees, and small leafy plants

• bears and deer

Marquis is writing a paper on ecosystems. Which statement is most likely to be included in his paper?

• A tree is a producer.

• A rabbit is a producer.

• The sun is a producer.

• A worm is a producer.

What is one characteristic that lakes and ponds share with estuaries?

• They are connected to oceans.

• They are saltwater ecosystems.

• They provide most of the Earth’s freshwater.

• They are affected by human activity, such as fishing.