Science Unit 7 CBA

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

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

Tags

NGSS.MS-LS2-3

 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?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

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

Tags

NGSS.MS-ESS2-5

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

Tags

NGSS.MS-LS2-2