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Observing Changes
Nutria
Partial Food Web for a River Ecosystem
100
Which statement describes the ice cube melting at Station 4?
What is B) Temperature changes cause a change in state.
100
The fur on nutria is made up of a protein called keratin. Which cell structure produces this protein?
What is B) Ribosome
100
Which organisms are categorized as primary consumers?
What is C) Rainbow trout and nutria
200
Which statement describes the molecules in the bubbles observed at Station 5?
What is C) The molecules are moving apart.
200
What are the smallest living functional units of a nutria?
What is A) Cells
200
Which of these would be the primary source of energy for nutria in this ecosystem?
What is C) Sedge
300
Which station best models the effect seawater could have on ships in the ocean?
What is A) Station 1
300
The students want to know whether female nutria have longer tails than male nutria. Which tool would the students most likely use to measure tail length?
What is C) Metric ruler
300
Scientists find a fossil of a nutria and a fossil of an unidentified rodent. The nutria fossil is found in a different rock layer 20 meters above the unidentified rodent fossil. How does the nutria fossil most likely compare to the unidentified rodent fossil?
What is B) The nutria fossil formed more recently.
400
Which of these best summarizes the changes seen at Station 2?
What is C) Physical change; the properties of the substance stay the same
400
Nutria from the same litter will often have characteristics different from each other. Which of these directly causes these differences?
What is A) Combination of genes from both parents
400
Nutria live in burrows along rivers. Which energy transformation occurs as water flows past these burrows?
What is A) Kinetic energy is transformed into sound energy.
500
The students want to calculate the forces acting on the block at Station 7. The mass of the block is 2.0 kilograms (kg). Force is determined by multiplying mass times acceleration (F = ma). What is the net force on the block at Station 7 when the nail is not in motion?
What is A) 10.0 newtons
500
Which two animals share the most recent ancestor based on the phylogenetic tree diagram in the passage?
What is C) Capybara and guinea pig