Unit 1 Test Review

Where does the energy start in this food chain?

• Plant
• Sun
• Deer
• Wolf

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-1

A carnivore obtains energy by eating other animals. Which of the following shows the process by which energy flows to a carnivorous animal?

• light energy → plant → carnivore

• plant → light energy → carnivore

• light energy → herbivore → carnivore

• light energy → plant → herbivore → carnivore

Tags

NGSS.MS-LS2-3

In the energy pyramid here, which organisms have the most energy available?

• Producers
• Carnivores
• Herbivores
• Top Predator

Tags

NGSS.MS-LS2-3

Analyze the river food web to answer the question. Which organism would be affected the most if pollution killed off the freshwater shrimp population?

• Algae

• Dragonfly

• Leech

• Perch

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-1

The flow of energy through an ecosystem can be illustrated through an energy pyramid. If 1,000 kilojoules of energy are available to the producers in this ecosystem, approximately how much energy would be available to the lowest trophic level organism that would be classified as a carnivore?

• 10 kilojoules

• 100 kilojoules

• 1,000 kilojoules

• 10,000 kilojoules

Tags

NGSS.MS-LS2-3

DDT is a chemical used on farms.
Toxin levels magnify as you go up the food chain. Would animals at the top or bottom of this pyramid be more affected by these DDT chemicals?

• Top

• Bottom

• Neither

Tags

NGSS.MS-LS2-4

Nutrients are continually reused and flow through an ecosystem from organism to organism. What is a specific example of an organism that could be represented by the letter X on the nutrient cycle?

• Bacteria

• Deer

• ferns

• lions

Tags

NGSS.MS-LS2-3

This graph shows how the population of bison in a section of present-day Yellowstone National Park has changed over time since 1860. What is the approximate carrying capacity for bison in this section of the park?

• 150

• 275

• 350

• 400

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which observation best explains the relationship between carrying capacity of the ecosystem and population size of the three species?

• Population size in species 1 was greatly limited by the available resources.

• Population size in species 2 reached equilibrium with the available resources.

• Population size in species 3 increased because resources were abundant which resulted in decreased competition.

• Population size in species 2 surpassed the amount of available resources which resulted in increased competition.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which event would most likely lead to secondary succession?

• the formation of a new island

• a forest fire

• the retreat of a glacier

• a lava flow