overview

What will it look like?

Item Type Biology EOC

Multiple Choice 30-34

Completion 1-5

Short Answer 5

Total Items 40

Total Points 45

Pilot Items 5

5-6 scenarios Systems Inquiry (Field Study and Controlled Investigation) Application

Systems Inquiry Application

• Diagram of a system and some text about a specific system.

• May include systematic observations, models, or open-ended explorations of a system.

• Documentation of the steps of a controlled experiment or field study.

• Data table with the results.

• Documentation of the use of the technological design process to solve a problem.

• Table with test results.

Types of Scenarios

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1. Conclusive statement correctly answers the experimental question (or correctly states whether the hypothesis/prediction was correct)

2. Supporting data for lowest condition When the manipulated variable was Xlowest, the responding variable was the lowest, Ylowest

3. Supporting data for highest condition 1. When the manipulated variable was Xhighest, the responding variable was Yhighest.

◦ Explanatory language is used to connect or compare the supporting data to the conclusive statement: So changing the manipulated variable by X caused the responding variable to increase/decrease by Y.

◦ Scientific Explanation provides a plausible scientific reason that explains the trend seen in the data table in terms of established scientific knowledge.

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Procedure Attributes Controlled Variables Manipulated Variable Responding Variable Record Measurements Trials are Repeated x3 Experimental Control Condition Extra Validity Measure Logical Steps

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1. Method for Collecting Data (Controlled Variable)

2. Conditions to be Compared x 3 (Independent/ manipulated Variable) Example: Which surface on the school campus will get hotter? Compare

asphalt, bare soil, and grass

3. Data to be Collected (Dependent/ responding Variable)

4. Record Measurements5. Observations are Repeated6. Record Environmental Conditions7. Logical Steps

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Research the Problem Gather Information

◦ where from Explore Ideas

◦ List solutions Criteria Constraints Test Idea/ solution Unintended Consequences

◦ on the solution◦ Effect on system

Redesign as needed Communicate results

SystemsAn assemblage of interrelated parts or conditions through which matter, energy and information flow.

Reliability: An attribute of any investigation that promotes consistency of results during repeated trials. Repeat TRIALS x3 more trials=more data=more reliable

Validity: An attribute of an investigation that describes the degree of confidence that data collected and logical inferences are accurate representations of the phenomena being investigated.

CONTROL GROUP & Experimental Controls

•Maintaining homeostasis

• Positive Feedback involves an exaggeration of the body’s efforts to get back to normal

•Delivering a baby

• Negative Feedback – getting the body back to normal

•Sweating, shivering, digestion

Answer BOTH bullets when there are 2. ◦Example: Describe two ways to solve the problem.◦ In your description be sure to:

Identify two solutions to the problem Describe how each solution will solve the problem

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Write a complete comparison – don’t write, “the amount of water does have an effect on the plant height.” Instead, say:

◦ Plant A grew the tallest; ◦ Plant A grew taller than plant B and plant C; ◦ The more water the plant had, the taller the

plant grew. Include supporting data and/or descriptive text from the data table.

◦ Quote from the data table. ◦ Be specific – cite data exactly as given in tables.

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Be sure to write the steps for a procedure when asked, not a conclusion or prediction.

USE correct manipulated (independent) and responding (dependent) variables BEWARE: Sometimes students switch the identities of the manipulated and responding variables and contradict their procedure.

15

Be very clear about what you are measuring & with unitsrecord the total number of organisms in the sample area measure the height of the plant in cm measure the time for seeds to germinate in hours

16

Write procedures that use the manipulated (independent) and responding (dependent) variables given in the new experimental or field study question.

Don’t use the same responding variable as was used in the original scenario. A procedure that does not use the correct manipulated variable cannot answer the investigative question and no points can be earned on the item.

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Able to find holes/failures of models

Be able to identify positive and/or negative feedback systems.

Distinguishing between steps in an investigation that increased reliability and steps that increased validity.

Know the roles and relationships among DNA, chromosomes, genes, ribosomes and proteins.

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cellular respiration happens in animals AND PLANTS

Identify the number of chromosomes in sex cells (n) versus body cells (2n) or after the processes of mitosis (2n), meiosis (n) or fertilization (2n)

Identify the processes that regulate the flow of substances into and out of the cell (e.g., active transport, osmosis)

Identifying the path of a carbon atom during photosynthesis and/or cellular respiration.

19

Understand the nitrogen cycle

mechanisms of evolution (e.g., genetic variability due to sexual reproduction, effect of natural selection on populations).

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