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Which organisms in the food web are considered tertiary consumers? Choose TWO organisms by clicking the appropriate boxes.

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What role do bacteria play in this environment?

• Producer

• Decomposer

• Photosynthesizer

• Consumer

Complete the following statement by moving the correct answers to the correct boxes. Not all answers will be used. Some answers may be used more than once. Alfred Wegner developed a theory that the continents were once a single landmass, but separated over time. ______ evidence of the animal Lystrosaurus has been found in the same geological layer on the continents of Africa and Antarctica.

• fossil

• mineral

• climatic

• oceanic

Complete the following statement by moving the correct answers to the correct boxes. Not all answers will be used. Some answers may be used more than once. These continents are now separated by major bodies of ______. The discoveries of these ______ help to prove the ______ theory.

• oceans, discoveries, plate tectonics

• rivers, inventions, evolution

• mountains, findings, gravity

• lakes, explorations, relativity

The diagram below shows four layers of sediment under the ground. Which two statements can students make about the layers of sediment underground? Select two correct answers.

• A. Fossils collected from Layer 1 will be younger than those collected from Layer 4.

• B. Fossils collected from Layer 3 will be larger than those collected from Layer 2.

• C. Fossils collected from Layer 3 will be the same age as fossils collected from Layer 1.

• D. Fossils collected from Layer 4 will be older than fossils collected from Layer 2.

• E. Fossils collected from Layer 4 could be closely related to fossils collected in Layer 1.

Humans depend on the oceans for food as well as for recreational entertainment. Which of the following are other ways in which humans depend on the oceans?

• II. Weather regulation due to coastal water temperature

• III. Transportation

• I. Oxygen production from phytoplankton

• IV. Relief from hurricanes and tornadoes

• A. I and II and III

Name the producer in this food web

• Cacti

• owl

• grasses

• rabbit

Which trophic level has the most energy available?

• Producer

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer

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

• phytoplankton

• Mushroom

• Dead wood

• Grass

Which scientific law are decomposers modeling when they break down fallen leaves and release carbon dioxide into the atomosphere and nitrogen into the soil?

• Newton's Third Law Action and Reaction

• Law of Conservation of Mass and Energy

• Law of Gravity

• Newton's First Law of Inertia