Massachusetts Comprehensive Assessment System
Practice Test
Biology
HigH ScHool
Student Name
School Name
District Name
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2021/2022
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Massachusetts Comprehensive Assessment System
Practice Test
Biology
HigH ScHool
Student Name
School Name
District Name
HOW TO ANSWER
OPEN-RESPONSE QUESTIONS
- Read all parts of each question carefully.
- Make each response as clear, complete, and accurate as you can.
- Support your responses.
- Check your answers.
This is a practice test. Your responses to practice test questions must be recorded on your
Practice Test Answer Document.
Mark only one answer for each multiple-choice question. If you are not sure of the answer,
choose the answer you think is best.
BioloBiologygy
Question 3 is an open-response question.
**- BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION.
- Show all your work (diagrams, tables, or computations) in your Practice Test Answer** **Document.
- If you do the work in your head, explain in writing how you did the work.**
Write your answer to question 3 in the space provided on page 4 of your Practice Test Answer Document.
●^3 The box below shows a list of supplies that are available in a laboratory.
- four flasks with stoppers
- floodlight
- tap water
- graduated cylinders
- small aquarium plants
- four small fish
- bromthymol blue (a chemical indicator that changes color from blue to yellow as the level of carbon dioxide in a solution increases)
The class sets up an experiment with the four flasks as shown.
Flask 1: 100 mL water, 1 mL bromthymol blue, plant Flask 2: 100 mL water, 1 mL bromthymol blue, 2 small fish Flask 3: 100 mL water, 1 mL bromthymol blue, 2 small fish, plant Flask 4: 100 mL water, 1 mL bromthymol blue
Flask 1 Flask 2 Flask 3 Flask 4
All four flasks are stoppered and placed under the floodlight.
a. What color would the solution in each flask be after a few hours?
b. Explain how the processes that have occurred in each flask result in the observed color of the bromthymol blue solutions.
2 STOP!
School Name:
District Name:
Marking Instructions
- Use a No. 2 pencil only.
- Do not use ink, ballpoint, or felt tip pens.
- Make solid marks that fill the circles completely.
Last Name of Student:
First Name of Student:
- Erase cleanly any marks you wish to change.
- Make no stray marks on this form.
- Do not fold, tear, or mutilate this form.