Why radiation is harmful

• What are the two terms discussed in the video?

  Irradiation and contamination
• What is irradiation?

  Exposure of an object to radiation
• What types of radiation are mentioned as ionizing radiation?

  Alpha particles, beta particles, gamma rays, x-rays
• What is contamination?

  Radioactive particles getting onto other objects
• Why is contamination a concern?

  It increases the risk of irradiation
• What factors determine how harmful radiation is?

  Type of radiation, exposure location, radiation amount
• How can ionizing radiation affect DNA?

  It can cause mutations
• Which type of radiation is generally the most dangerous?

  Ionizing radiation
• What can rare mutations from radiation lead to?

  Cells dividing uncontrollably, cancer
• What type of radiation can also lead to cancer?

  Ultraviolet radiation
• What is the order of radiation types from most harmful to least harmful?

  • Alpha particles (most harmful)
  • Beta particles
  • Gamma rays
  • X-rays
  • Ultraviolet radiation
  • Microwaves
  • Radio waves (least harmful)
• How does the location of the radiation source affect its harm?

  Alpha radiation is less harmful outside the body
• Why are beta and gamma radiation more dangerous from external sources?

  They can penetrate the skin
• What makes alpha radiation the most dangerous if inside the body?

  It can enter cells directly
• What is the term for the amount of radiation exposure?

  Dosage
• What factors affect radiation dosage?

  Distance, exposure time, radioactivity
• What precautions should be taken around radioactive sources?

  • Wear protective gear (gloves, overalls)
  • Use tools (tongs) for handling
  • Store items in lead-lined boxes
• Can being irradiated cause mutations or make someone radioactive?

  No, it cannot cause mutations or radioactivity
• When can someone harm others with radiation?

  When carrying a radioactive source
• What is the main takeaway from the video about radiation?

  • Understand irradiation and contamination
  • Recognize harmful effects of radiation
  • Take precautions around radioactive sources