NEW
Font size
WorksheetsScience Unit 7 CBA
Total questions: 8
Worksheet time: 40mins
In many desert ecosystems, days are hot and nights are cold. Water is scarce, so animals seek water wherever possible. The spines of a cactus are actually leaves adapted to conserve water. The cactus plants have also adapted to live in thin, sandy soil. Which of the following is a biotic component of a desert ecosystem?
the spiny cactus leaves
the wide temperature range
the scarcity of water
the thin, sandy soil
Which of the following MOST completely describes the components of a pond ecosystem?
the plants and animals that live in and around the pond
the soil and water that make up the pond
the organisms and nonliving environment in and around the pond
the fish and other aquatic animals in the pond
What word BEST completes the diagram?
habitat
community
species
biome
Sagebrush is the dominant vegetation in Yellowstone National Park. Collectively, all the sagebrush make up —
a community
a population
a niche
an ecosystem
Which of the following diagrams BEST represents an ecosystem?
Which pair BEST matches this pair of phrases?
class of students – school campus
population – ecosystem
abiotic – biotic
species - organism
population - species
Which of the following statements represents a result of abiotic change?
A giraffe eats up to 35 kg of vegetation daily
Due to the decrease in bobcat numbers, whitetail deer are experiencing extreme overpopulation in certain counties
The southwest experienced a decline in yucca population due to a decrease in natural pollinators
Water flow velocity increases in a stream after spring rains
In prairie ecosystems, the prairie dog is a keystone species. This means that prairie dogs are important in the stability of the structure of the ecosystem. More than 200 wildlife species depend directly or indirectly on the prairie dogs for food and habitat. Among those animals associated with prairie dogs, their colonies, and burrows are insects, coyotes, eagles, foxes, hawks, burrowing owls, badgers and black-footed ferrets.
According to this passage, which statement below is correct?
In prairie ecosystems, all prairie dogs make up a community
Prairie dogs, insects, coyotes, eagles, foxes, hawks, owls, badgers, and ferrets are abiotic components of the prairie ecosystem
All the interacting populations in the ecosystem, including the prairie dog, make up a community
Only the animals dependent on the prairie dogs make up a community
