8th Grade 5th 6 weeks test review

According to the food web above, which of the following animals preys on the bass?

• mountain lion

• turtle

• sunfish

• raccoon

Tags

NGSS.MS-LS2-2

Decomposers break down fallen leaves on the forest floor. When they do this, they release carbon dioxide into the atmosphere and nitrogen to the soil. Which of the following organisms would most likely be decomposers?

• bacteria

• mold

• mushrooms

• grass

Tags

NGSS.MS-LS2-3

According to the food web above, how many different animals does the alligator feed on?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS2-2

According to the diagram, the Alligator and the Raccoon are close to the top of the food web. Which organism feeds on a greater variety of organisms?

• The alligator because the diagram shows that they feed on four different types of organisms.

• The raccoon because the diagram shows that the raccoon feeds on four different types of organisms.

• Both the alligator and the raccoon feed on two separate organisms.

• Both the alligator and the raccoon feed on three separate organisms.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

According to the food web above, what would be the most likely outcome if all of the mountain lions were removed from this ecosystem?

• The deer population would increase due to the lack of predation.

• The deer population would increase due to the lack of predation and the raccoon population would decrease because they lost their only food source.

• The turtle population would increase due to the lack of predation.

• The egret population would increase due to the lack of predation.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Bacteria and mold break down fallen leaves on the forest floor. When they do this, they release carbon dioxide into the atmosphere and nitrogen to the soil. Which of the following roles do bacteria and mold have in the environment?

• consumers

• producers

• decomposers

• predators

Tags

NGSS.MS-LS2-3

Clown fish live in the waving tentacles of sea anemones in the ocean. The sea anemone provides a safe place for the clown fish to escape predators. The sea anemone, although it has poisonous tentacles, does not bother the clown fish and is not harmed by the clown fish. This relationship between organisms can be described as -

• commensalism

• mutualism

• parasitism

• predation

What best explains the variation in tree heights in the tropical rain forest?

• grazing patterns of herbivores

• competition for light and moisture

• fewer nutrients are available to the shorter trees

• the intense heat causes the trees to be shorter than similar trees in other biomes

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of the following compete for food in this food web?

• The whelk competes with the loggerhead turtle for mackerel.

• The clams and zooplankton compete with the mackerel for phytoplankton.

• The tiger shark competes with the tuna for the mackerel.

• The squid competes with the herring for clams.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

What is the relationship between the hawk and the grasshopper in this food web?

• The hawk is a primary producer and the grasshopper is a third-level consumer.

• The hawk is a predator and the grasshopper is its prey.

• The grasshopper is a parasite and the hawk is the host.

• The hawk is a tertiary consumer and the grasshopper is a primary consumer.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4