Cycle 5- 3 Week Assessment

Polar bears, snow, and sunlight are all parts of an ecosystem in the Arctic. Which of the following correctly classifies these factors in an ecosystem as biotic or abiotic?

• Biotic: polar bears and sunlight; Abiotic: snow

• Biotic: snow and sunlight; Abiotic: polar bears

• Biotic: polar bears and snow; Abiotic: sunlight

• Biotic: polar bears; Abiotic: snow and sunlight

Choose the option that best differentiates between populations, communities, and ecosystems.

• A. Bears of different species do not make up a population; a population consists of

• B. A population consists of individuals of the same species; a community consists of different populations; an ecosystem consists of communities and the environment

• C. A community consists of individuals of the same species; a population consists of different communities; an ecosystem consists of populations and the environment

• D. An ecosystem consists of individuals of the same species; a community consists of different ecosystems; a population consists of communities and the environment

Which of the following best describes the relationship between seals, bears, and penguins?

• A. Seals and bears form a population, while penguins form a community.

• B. Seals represent a population, while bears and seals together form a community. An ecosystem consists of all living organisms (biotic factors) and their physical environment (abiotic factors).

• C. Penguins and bears do not form a population since populations consist of individuals of the same species. Seals form a population, all organisms together form a community, and the ecosystem includes both living organisms and their surrounding environment.

• D. An ecosystem consists of multiple communities and abiotic factors, communities include only living (biotic) organisms, and populations consist of members of the same species.

What was the effect of snails on coral growth?

• Snails increased coral growth.

• Snails had no effect on coral growth.

• Snails decreased coral growth.

• Snails changed the color of the corals.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which correctly classifies the factors in this experiment as biotic and abiotic?

• Water and sunlight entering the ocean are biotic factors.

• Corals and sand are biotic factors; sunlight and water are abiotic factors.

• Sunlight and water are biotic factors; corals and sand are abiotic factors.

• Abiotic factors are the tiles, sunlight, and sand; corals are biotic factors.

Tags

NGSS.MS-LS2-1

Based on the information provided, what is the most likely long-term effect of the significant reduction in the wolf population on the forest ecosystem?

• The deer population will continue to grow indefinitely.

• The plant population will increase due to reduced grazing pressure.

• The ecosystem will quickly return to its original balance without intervention.

• The deer population may overgraze, potentially leading to a decline in plant diversity and abundance.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In this tropical rainforest ecosystem, the boa constrictor appears to be a top predator. If the boa constrictor population suddenly declined due to disease, which of the following are likely outcomes? Select TWO that apply.

• The toucan population would likely increase due to reduced predation pressure.

• The butterfly population would significantly increase due to the boa's absence.

• The squirrel monkey population may increase, potentially affecting vegetation.

• The beetle population would experience a sudden boom in numbers.

• The macaw population would likely decrease due to increased competition for food.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

A class is studying how desert plants survive in their dry environment. Which abiotic factor do the adaptations shown in the image mainly help these desert plants depend on?

• Air

• Water

• Soil

• Temperature

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Based on this sequence, which of the following most likely represents the changes in the deer mouse population from Year 1 to Year 5?

• 150 → 200 → 100 → 50 → 250

• 150 → 150 → 150 → 150 → 150

• 150 → 100 → 50 → 25 → 75

• 150 → 150 → 200 → 250 → 300

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Based on the abiotic factors present in each ecosystem, which of the following statements is true?

• A. Organisms in the desert are more likely to compete for water than those in the rainforest.

• B. Organisms in the rainforest are more likely to compete for water than those in the desert.

• C. Organisms in both ecosystems compete equally for water.

Tags

NGSS.MS-LS2-1