Ecosystems: Chapter 8 Test
1
What is always the first living thing in a food chain?
A.An herbivore
B.A carnivore
C.An omnivore
D.A producer
2
Marla observes a bird catching and eating a worm. Then she continues observing the
same bird. Which additional observation would help Marla classify the bird as a
consumer?
A.The bird catching and eating a caterpillar
B.The bird eating some berries or seeds
C.A fox catching and killing the bird
D.None of the other answer choices
3
Which group includes all of the consumers?
A.All living things that run, walk, swim, or fly
B.All living things that make their own food
C.All living things that eat other living things for food
D.All living things that eat plants, but not animals
4
An organism that gets the energy it needs entirely from plants is a(n)
A.carnivore.
B.omnivore.
C.herbivore.
D.producer.
5
In the ocean ecosystem, most of the producers are tiny plankton that live on or near the
surface of the water. If all of these plankton died out, how would the ocean ecosystem
be affected?
A.The herbivores would die out, but the carnivores would remain.
B.Most of the consumers would move from the surface to lower depths of the ocean.
C.Most or all of the consumers would die out.
D.None of the other answer choices
6
Many years ago, gray squirrels from North America arrived in England. These gray
squirrels now compete with England's red squirrels. What best describes their
competition?
A.The gray squirrels hunt and eat the red squirrels.
B.Other animals hunt and eat both kinds of squirrels.
C.Both kinds of squirrels try to use the same resources for food, shelter, or other needs.
D.The red squirrels hunt and eat the gray squirrels.
7
In a grasslands ecosystem, red-tailed hawks catch and hunt a variety of different
animals— including mice, snakes, and rabbits. How many food webs and food chains
include the hawks of this ecosystem?
A.1 food web and 1 food chain
B.1 food web and many food chains
C.Many food webs and 1 food chain
D.Many food webs and no food chains
8
Liam wants to make a diagram showing how energy flows through food chains. What
should his diagram show?
A.How food flows through the digestive system of a spider
B.How energy flows inside the sun
C.How energy flows from the sun to plants, animals, and decomposers
D.How food travels from farms to grocery stores to people's homes
9
Keisha wants to use the Internet to research animals that are consumers. Which phrase
should she type into the search engine?
A.“organisms that make their own food”
B.“organisms that eat other organisms”
C.“organisms that grow on grasslands”
D.“organisms that need carbon dioxide”
10
In much of Texas, ranchers raise cattle on large ranches and small farms. Cattle are
herbivores, and during spring and summer they eat grass in the fields. In winter,
ranchers feed their cattle hay and other food made from plants.
A farmer with a few acres of land wants to raise cattle. During the winter, the farmer can
produce 1,008 kilograms of hay per week. Each cow eats 84 kg of hay per week. How
many head of cattle can the farmer feed?
A.12
B.25
C.84
D.924
11
If a forest fire destroyed 35 percent of the trees and other plants in a forest ecosystem,
which group of organisms would be affected?
A.Herbivores
B.Carnivores
C.Omnivores
D.All of the other answer choices
12
The drawing shows a food web.
Which of the following organisms compete with each other for energy?
A.Mouse, cricket
B.Grass, mouse, frog
C.Elk, snake, frog
D.None of the other answer choices
AK
1.D
2.D
3.C
4.C
5.C
6.C
7.B
8.C
9.B
10.A
11.D
12.A