How Close is Too close?
Using Standard and Non-standard Measures
- Length: 60 Minutes
- Objectives and Standards
- Materials and
- Procedure and
- Handouts and
According to the CDC, COVID-19 spreads mostly among people who are in close contact. “Close contact” usually means being within six feet of another person for longer than 15 minutes. The virus that causes COVID-19 spreads when an infected person coughs, sneezes, laughs, talks or sings. These actions spray tiny, invisible droplets of saliva or mucous into the air. The droplets can contain virus particles which, in turn, can land in the mouths, noses or eyes of people nearby.
New studies have found that people who are infected can spread COVID-19 even if they are not experiencing symptoms. This is why it is important to maintain an appropriate physical distance from people not living in your household, and to wear a face covering (mask) over your mouth and nose. In general, it is safest to avid crowded places and gatherings where it may be difficult to maintain physical distancing.
Objectives and Standards
Students will measure distances of 6 feet using standard and non-standard units.
Next Generation Science Standards Science and Engineering Practices
Analyzing and interpreting data
Using Mathematics and Computational Thinking
Materials and Setup
Teacher will need:
How Close pptx file
Computer or projector
Students will need:
How Close Is Too Close Student Page (electronic or hard copy)
Ruler or measuring tape
Household or classroom items that can be used to measure distance
Tape or sticky notes
Set Up and Teaching Tips
This activity begins with a class discussion guided by slides. Students then use household or classroom objects to conduct non-standard measurements of six feet. You may assign the hands-on portion of the activity as homework. If students do not have a ruler or tape measure at home, have them download a printable ruler (see https://www.avery.com/resources/avery-printable-ruler.pdf).
Procedure and Extensions
Project the title slide of the How Close Is Too Close presentation. Read the question, How can social distancing slow the spread of COVID-19? Ask students what they know about “social distancing.” Encourage them to share their ideas.
Explore and Explain
Use the slides to guide a discussion with students.
Slide 2. Explain that scientists have learned the virus that causes COVID-19 is spread through person-to-person contact. Virus particles contained within tiny droplets of saliva and mucous are released into the air when people talk, shout, laugh, sing, cough or sneeze. Ask, Why do health experts recommend that we keep a distance of six feet apart?
Slide 3. Direct students’ attention to the image and explain that scientists have found that droplets from a sneeze, cough, talking etc. can travel about six feet in air.
Slide 4. Ask, Where can these droplets go? Into the mouths, noses and eyes of others! Once a virus enters the body, it can infect a person’s respiratory system and can cause illness.
Slide 5. Remind students that some people infected with the virus may not look or feel sick. It might take several days for them to develop COVID-19 symptoms, but they still may be able to pass the virus to others during this time. Some people develop few or no symptoms, but they also can spread the virus. This is why it is important to wear a mask and practice physical distancing when around other people who do not live in your household. These steps help to prevent disease.
After the slideshow say, We know that COVID-19 is spread through person to person contact. Physical (or social distancing), which means keeping at least 6 feet from others, is one way to limit the spread of the virus. What does 6 feet look like if you can’t measure it?
Explain to the class that they will use household items to see just how far apart they should stand from others.
Project the student page and review the instructions together. You, the teacher, can assign due date for work completion.
Have students describe how they used alternative units of measurement to estimate six-foot distances. Or, if they complete this portion of the activity as homework, have students make a drawing or have someone at home take a photo of their unique non-standard measures.
Conduct a discussion with students about ways in which they can maintain their social contacts but remain physically distant. Accept all answers. Possibilities include seeing others outdoors at a safe distance or meeting using video calls or conferencing.
Handouts and Media
Scientific American. 2017. Human Body Ratios.
Centers for Disease Control and Prevention, Social Distancing.
The COVID HACKS curriculum project is made possible thanks to the support from Laura & John Arnold and Baylor College of Medicine. Scientists, educators and physicians from Baylor College of Medicine provided content, feedback and technical reviews.