5.9(A) Ecosystem interactions

Students study barracudas. They gather some observations of barracudas. A barracuda is shown.

Which observation describes barracudas interacting with the living elements of their ecosystem?

• Barracudas can travel quickly using surface ocean currents.

• Barracudas live around hard structures such as oil rigs and jetties.

• Barracudas are predators of other fish.

• Barracudas tend to live in warm waters.

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5.9(A)

Two box turtles live in a zoo's reptile house. Zoo victors made a list of observations of the turtles. The list is shown.

1. Sliding into a small pond

2. Eating a strawberry

3. Digging a hole in sandy soil

4. Climbing onto a flat rock

5. Holding an earthworm in its mouth

6. Walking across the area.

Which observations best describe how box turtles interact with living parts of their environment?

• Observation 4 and 6

• Observation 2 and 5

• Observation 1 and 5

• Observation 3 and 4

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5.9(A)

A student's model of a closed ecosystem is shown. The student plans to add land snails to the model in order to show how the snails interact with different parts of the ecosystem.

What should the student add to model so the snails will survive?

• Fish to provide food

• Sticks to provide a place to hide

• Deep water to provide carbon dioxide

• Living plants to provide oxygen

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5.9(A)

A zookeeper sets up a habitat for a certain species of rabbit. Which answer choice describes the rabbit as it interacts with two nonliving parts of the rabbit's habitat?

• The rabbit breathing air while running down a rocky path

• The rabbit licking its fur while feeding its young

• The rabbit hiding under plants from loud noises

• The rabbit nibbling on vegetation inside the habitat

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5.9(A)

Which of these describes one or more living organisms that depend on another living organism to survive?

• Bacteria living in the mouth of a horse

• Ivy plants growing up a fence to obtain more sunlight

• Mold living on a hard, rocky surface

• An angelfish releasing carbon dioxide into pond water

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5.9(A)

Aquatic plants have adaptions that help them live in water. For example, the structures needed for making food are located on the tops of floating plant leaves.

This adaption helps the plants ____

• absorb sunlight

• stay anchored

• avoid predators

• capture fish

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5.9(A)

Green anole lizards are bright-green reptiles native to the southeastern United States and the Caribbean islands. They can be kept in terrariums to study their behavior and how they interact with their environment.

Which observation describes this anole lizard interacting with the living elements in its environment?

• The anole rested one of the rocks and lifted its head toward the light.

• The anole climbed the plant and then ate a cricket off one of the leaves.

• The anole drank some water and then ran across the sand.

• The anole jumped from the rock and scattered sand with its tail.

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5.9(A)

Many gardeners use red worms to turn vegetable and fruit scraps into topsoil for plants. The gardeners build a worm farm in a large container lined with old newspapers and filled with moist garden soil. The worms eat about half their body weight daily and produce waste that can be used as plant fertilizer.

The container for a worm farm needs to have a lid, but the lid must be left partially open because worms require which of the following to survive?

• Oxygen

• Sunlight

• Carbon dioxide

• All of these

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5.9(A)

A student observing birds in a park records some ways that bird interact with living and nonliving parts of their environment. All the following observations are ways that a bird interacts with nonliving parts of its environment except

• reacting to morning sunlight by singing

• drinking and taking a bath in a puddle of water

• responding to cold temperatures by fluffing its feathers

• feeding insects to its chicks

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5.9(A)

Tropical climates have warm temperatures and abundant sunlight all year. What must be available for plants in these climates to make their own food throughout the year?

• Bacteria

• Birds

• Shade

• Water

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5.9(A)