First, download the exercise here :
And then let your student to read this text and fill the blank with the words on the link above
Most people hear terms like radiation and ______(1) as a bad or
dangerous thing. It turns out that _____(2) are ordinarily harmful to
humans. For example, ultraviolet radiation can give people sunburns.
X-rays and gamma rays can _____(3), or even die if they are exposed to
them for a very long time. Some types of particle radiation can also
make people sick and lead to burns. Any type of radiation that causes
changes in the world like these is referred to _____(4). If radiation
does not carry high enough levels of energy, though, then these changes
_____(5) something is hit by the radiation. This is referred to as
non-ionizing radiation, which is not as dangerous.
One can
distinguish between various types of radiation by _____(6) of the
radiation, its wavelength (if the radiation is electromagnetic), the
amount of energy being carried, any particles involved, etc. Radioactive
material is a physical material that emits radiation. Uranium and
_____(7) radioactive materials. The atoms they are made of tend to fall
apart and give off different kinds of radiation, like gamma rays and
lots of types of particle radiation.
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