Question

Write a lab report for this lesson’s lab. Be sure that your report:
includes all major elements of a lab report.
meets your teacher’s content and format expectations.
is clearly organized and formatted.
demonstrates strong scientific reasoning and writing.
While writing, you can revisit previous parts of the lesson by returning to the course map. Be sure to refer to the
lab’s student guide, which you can find on the first page of the lab experiment activity. You may also find it
helpful to refer to the remaining pages of this guide, which provide general guidelines for writing lab reports.
Lab Report Checklist
Introduction
Did you title your lab report?
Did you state the purpose of the experiment?
Did you state the question you posed before the
experiment?
Did you restate the hypothesis (or prediction) you
formulated before the experiment?
Did you list all variables and label the
independent and dependent variables? Did you
indicate any controlled variables?
Materials and Procedure
Did you make a list of materials? Did you include
quantities and SI units?
Did you present the steps of the procedure as a
numbered list? Did you note any changes to the
original procedure?
Did you identify your experimental and control
groups?

Answer 1

Answer:

the process by which green plants turn carbon dioxide and water into food using energy from sunlight

Answer 2

Lab Report: Investigation of the Effects of Temperature on Enzyme Activity

Introduction:

Title: The Effects of Temperature on Enzyme Activity.

Question: How does the temperature affect the activity of catalase?

Variables: The independent variable is the temperature, while the dependent variable is the rate of enzyme activity.

Materials and Procedure:

3% hydrogen peroxide solution

Potato slices

Test tubes

Thermometer

Ice bath

Water bath

Hot water bath

Procedure:

Cut potato slices into equal sizes.

Prepare three test tubes, and label them as "Ice bath," "Room temperature," and "Hot water bath."

Place the test tube labeled "Ice bath" in a beaker filled with ice water for 5 minutes.

Place the test tube labeled "Room temperature" on the lab bench for 5 minutes.

Take one potato slice and add it to each test tube.

Observe the reaction in each test tube, and measure the time taken for the potato slice to sink to the bottom.

Experimental and Control Groups:

The experimental group consists of the three test tubes containing hydrogen peroxide solution and potato slices. The control group consists of the same setup, but without the potato slices.

Results:

The reaction rate was slow at low temperatures, and the enzyme was denatured at high temperatures.

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