Worksheet: Detecting and Blocking Different Types of Radiation

In this worksheet, we will practice detecting alpha, beta, and gamma radiation and what materials are effective at stopping different types of radiation.

Q1:

What is the name of the instrument that can be used to measure the level of radiation in an area?

  • AA Geiger counter
  • BA Sievert counter
  • CA Becquerel counter
  • DA Thomson counter
  • EA Rutherford counter

Q2:

Which material is suitable for lining a box that is used to store a radioactive source?

  • AIron
  • BLead
  • CCardboard
  • DGold
  • EPolystyrene

Q3:

Which type of radiation has the shortest range in air?

  • ABeta radiation
  • BAlpha radiation
  • CGamma radiation

Q4:

Which type of radiation has the greatest range in air?

  • ABeta radiation
  • BAlpha radiation
  • CGamma radiation

Q5:

Which of the following is the approximate range of gamma radiation in air?

  • A1 m
  • B10 m
  • CThe range is too long to be measured.
  • D1 km
  • E1 cm

Q6:

What is the approximate range of beta radiation in air?

  • A10 m
  • B1 km
  • C1 m
  • D1 mm
  • E1 cm

Q7:

What is the typical range of alpha radiation in air?

  • A5 cm
  • B0.5 mm
  • C0.1 mm
  • D1 m
  • E50 m

Q8:

Which of the following types of radiation have no electric charge?

  1. Gamma radiation
  2. Alpha radiation
  3. Beta radiation
  4. Free neutrons
  • Ab and c
  • Bc and d
  • Ca and c
  • Da and d
  • Ea and b

Q9:

Which of the following types of radiation is negatively charged?

  • AGamma radiation
  • BAlpha radiation
  • CFree neutrons
  • DBeta radiation

Q10:

Which of the following types of radiation is positively charged?

  • AAlpha radiation
  • BGamma radiation
  • CFree neutrons
  • DBeta radiation

Q11:

Which of the following types of radiation would be stopped by a 5 mm thick sheet of aluminum?

  1. Alpha radiation
  2. Free neutrons
  3. Gamma radiation
  4. Beta radiation
  • Aa and d
  • Bc and d
  • Ca and c
  • Db and d
  • Ea and b

Q12:

Which of the following types of radiation would be stopped by a thin sheet of paper?

  • AGamma radiation
  • BBeta radiation
  • CFree neutrons
  • DAlpha radiation

Q13:

Which type of ionizing radiation is most easily absorbed?

  • AFree neutrons
  • BGamma radiation
  • CBeta radiation
  • DAlpha radiation

Q14:

Which of the following is the correct definition of ionization?

  • AIonization is the process of an unstable nucleus decaying and emitting a charged particle.
  • BIonization is the process of multiple charged atoms or molecules grouping together.
  • CIonization is the process by which an atom or a molecule becomes electrically charged by losing or gaining electrons.
  • DIonization is the process of an unstable nucleus emitting a gamma ray.
  • EIonization is the process of charged atoms or molecules becoming electrically neutral.

Q15:

Which unit is used to measure the number of decays of a radioactive sample per second?

  • ARƶntgen (R)
  • BHertz (Hz)
  • CGray (Gy)
  • DBecquerel (Bq)
  • ESievert (Sv)

Q16:

Beta radiation can be used to measure the thickness of aluminum foil during production and to automatically control the speed and pressure of the rollers that press the metal into foil. This is shown in the diagram. The Geiger counter measures the amount of radiation that comes through the foil from the beta source on the other side. The Geiger counter is connected to a system that controls the rollers.

If the foil is , then the detector reading and the detector sends a signal to increase the pressure of the rollers on the metal sheet. This makes the foil .

  • Atoo thick, decreases, thicker
  • Btoo thick, increases, thinner
  • Ctoo thin, increases, thicker
  • Dtoo thin, decreases, thicker
  • Etoo thick, decreases, thinner

If the foil is , then the detector reading and the detector sends a signal to decrease the pressure of the rollers on the metal sheet. This makes the foil .

  • Atoo thin, increases, thicker
  • Btoo thin, decreases, thinner
  • Ctoo thick, decreases, thinner
  • Dtoo thin, increases, thinner
  • Etoo thin, decreases, thicker

Which of the following correctly explains why alpha radiation would not be suitable for this application?

  • AAlpha radiation would be stopped by the foil; therefore, the Geiger counter would never detect any radiation other than background radiation.
  • BAlpha radiation would be repelled by the foil because both are positively charged; therefore, the Geiger counter would never detect any radiation other than background radiation.
  • CGeiger counters only detect beta radiation.
  • DAlpha sources do not last very long; therefore, the radioactive source would have to be replaced too often.
  • EAlpha radiation passes straight through aluminum foil; therefore, the thickness of the foil would never affect the count rate.

Q17:

Sourceš“šµš¶š·
Absorbing Material2 mm lead sheetThin sheet of paper8 cm lead sheet5 mm aluminum sheet

Victoria has four unknown radioactive samples. She wants to find out what type of radiation is emitted by each. She sets up each radioactive source so that it points toward a Geiger counter and then places different materials of different thicknesses in between. The table shows what material and what thickness was needed to block the radiation from each source.

What type of radiation is emitted by source š“?

  • ABeta radiation
  • BAlpha radiation
  • CGamma radiation

What type of radiation is emitted by source š¶?

  • AGamma radiation
  • BAlpha radiation
  • CBeta radiation

Which radioactive source is emitting alpha radiation?

  • ASource šµ
  • BSource š¶
  • CSource š“
  • DSource š·

Q18:

SourceCounts per Minute
No Absorbing MaterialThin Sheet of Paper5 mm Aluminum Sheet1 cm Lead Sheet
A3623341410
B809121010
C251250251248

What type of radiation is emitted by source A?

  • AAlpha radiation
  • BBeta radiation
  • CGamma radiation

What type of radiation is emitted by source B?

  • AAlpha radiation
  • BBeta radiation
  • CGamma radiation

What type of radiation is emitted by source C?

  • AAlpha radiation
  • BBeta radiation
  • CGamma radiation

Which of the following materials would absorb the radiation emitted by source C?

  • AGold that is more than 0.01 mm thick
  • BConcrete that is more than 1 m thick
  • CPolystyrene that is more than 50 cm thick
  • DTin that is more than 5 cm thick
  • EIron that is more than 2 cm thick

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