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Monitoring and Assessing EMF Radiation Levels in Classrooms

A [10-12] grade STEM lesson

Author:

Mr. Jovencio Tierra III

Date:

January 23, 2023

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Notes for teachers

- This lesson can be done in 1-2 hours.

- Students can choose a partner or form a group of 3 members.

- The focus of this lesson build conceptual understanding on electromagnetic waves, analyze the gathered data.

- Collaboration should be encouraged.

List of Materials

�Chromebook

�Notebook

�Pencil

�Smartphone

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AZ Standards Science and Engineering Practices for HS

Compare and contrast various types of data sets (e.g., self-generated, archival) to examine consistency of measurements and observations.

Use investigations to gather evidence to support explanations or concepts.

Consider limitations (e.g., measurement error, sample selection) when analyzing and interpreting data.

Essential HS.P4U1.10

- Construct an explanation about the relationships among the frequency, wavelength, and speed of waves traveling in various media, and their applications to modern technology

AZ Physical Science Standards

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Objectives:

Today we will assess and monitor the EMF radiation levels in classrooms.
Today we explore the factors that affect the differences in EMF radiation levels in different classrooms.
Today we will collaborate and communicate effectively with our peers to analyze and interpret a data.

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Agenda

1. Describe the forms of electromagnetic waves.

2. Gather data and analyze

3. Share or Present

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Intro/Driving Question/Opening

1. What are electromagnetic waves?

2. How do these waves affect our daily life?

3. How do electromagnetic waves travel?

4. How do electromagnetic waves transfer energy?

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Hands-on Activity Instructions

In a group of 3 medical physicists , they monitor and assess the EMF radiation level in each classroom.
Each group will be assigned to monitor and assess the EMF radiation level of 2 to 3 classrooms.
Using their mobile phone, they will download the app “Magnetic Field Sensor”
After downloading, click the app and choose “Start Detecting”
Then click, “Digital Meter”.

Magnetic Field Sensor app

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Hands-on Activity Instructions

They move their phone in various locations in the classroom then record the level of emf radiation in microtesla.
Let the “app” turned-on for one minute. After a minute, start recording the data.
Make sure to click the “refresh” button when getting a different results.
Student will analyze their data, write their observations and present it to the class.
Other groups will take note of the presenters data then compare and contrast with their own data.

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SAMPLE DATA TABLE

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Assessment

1. How does your data change from one classroom to another?

2. Which area/location in the classroom has the greatest level of EMF radiation? Which area in the classroom has the lowest level of EMF radiation?

3. Did you see any pattern in the data that you have gathered? What similarities and differences have you noticed?

4. What are the factors that contribute why this area has the greatest level of EMF radiation?

5. Are the results normal or unusual? What measurement should you get in order to consider your result to be harmful?

6. What happens when your are exposed to a high level of EMF radiation?

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Differentiation

Students who are struggling with this lesson can be provided with different hands-on activities such as by visiting offices in the school then identify different equipment or devices and explain how these equipment/devices work in relation to the forms of electromagnetic waves. They can create a powerpoint presentation and present it to the class.

Remediation

Extension/Enrichment

Students who are successful right away can create a poster-slogan or an informational graphic organizer about the effect of electromagnetic radiation in our environment and other living things.