RC_NOS_Why do scientists change their mind?

Why did the U.S. Surgeon General advise against buying masks in February 2020?

• Masks were too expensive to be widely distributed

• Masks were ineffective in preventing the spread of the coronavirus

• There was a shortage of masks for healthcare workers

• Masks were causing skin irritation for many people

What did public health officials recommend if social distancing was not possible?

• Washing hands frequently

• Avoiding crowded places

• Wearing masks

• Using hand sanitizer

Why is changing recommendations considered a normal part of the scientific process?

• New evidence emerges

• Experts like to confuse people

• To make things more complicated

• To waste time and resources

Tags

NGSS.HS-ESS3-5

NGSS.HS-ETS1-3

NGSS.HS-PS1-2

What did the World Health Organization suggest to prevent the virus spread?

• Washing hands frequently

• Avoiding crowded places

• Using disinfectants

• Wearing masks

Why did scientists change their advice regarding the coronavirus?

• Due to political pressure

• Based on evolving research and data

• To confuse the public

• To test public reaction

What does the WHO currently recommend to prevent the transmission of the virus?

• Social distancing

• Hand hygiene

• Wearing masks

• Avoiding crowded places

Why did public health advice change multiple times during the pandemic?

• Lack of expertise among health officials

• New scientific discoveries

• Political interference

• Inconsistent data

Research is always changing. One day, caffeine is said to be good for you. The next day, it causes cancer. Which of the following is the most likely reason that scientific investigations are always changing their conclusions.

• The methodology of investigations may include new or different technology resulting in new data

• Scientists fail to replicate investigations exactly the same as the original investigation

• Peer review causes scientists to modify their data and conclusion statements

• More members join the scientists and conflicts in ideas and procedures causes changing results

Why is changing recommendations considered a normal part of the scientific process?

• New evidence emerges

• Experts like to confuse people

• To make things more complicated

• To waste time and resources

Tags

NGSS.HS-ESS3-5

NGSS.HS-LS4-5