The electromagnetic _____________ is the range of all possible frequencies of electromagnetic
radiation. A common name for the electromagnetic radiation that humans can see is
______________ light. What humans call white light is actually made up of all of the colors in
the ______________. The entire range of frequencies, however, extends from far below to far
above what can be seen the human eye. Light is energy that travels like a _____________. A
very low frequency might have a __________________ that is longer than a
_________________, whereas a very high frequency might be shorter than an __________.
Humans use many parts of the electromagnetic spectrum that cannot be seen. For example, a
_____________ signal will pass through you like you are a window, but a proper antenna can
capture the signal so it can be transformed into something you can hear. Other frequencies are
used in medicine. For example, _____________ are used to check for broken bones because
they partially pass through you. But be careful of the _______________ range! Frequencies in
this range can cook you just as they cook your food. Your skin can be damaged by __________
frequencies, if you do not take care. But ____________ can help you feel warm, even if you
cannot see it.
word bank: wavelength visible microwave kilometer
infrared radio atom rainbow
x-rays spectrum ultraviolet wave
surely you can fill in at least some of the blanks.
google electromagnetic spectrum for a start (which also fills in the first blank!)
www.siyavula.com/read/science/grade-10/electromagnetic-radiation/11-electromagnetic-radiation-03
The electromagnetic __spectrum__ is the range of all possible frequencies of electromagnetic radiation. A common name for the electromagnetic radiation that humans can see is __visible__ light. What humans call white light is actually made up of all of the colors in __the rainbow__. The entire range of frequencies, however, extends from far below to far above what can be seen by the human eye. Light is energy that travels like a __wave__. A very low frequency might have a __wavelength__ that is longer than a __kilometer__, whereas a very high frequency might be shorter than an __atom__. Humans use many parts of the electromagnetic spectrum that cannot be seen. For example, a __radio__ signal will pass through you like you are a window, but a proper antenna can capture the signal so it can be transformed into something you can hear. Other frequencies are used in medicine. For example, __x-rays__ are used to check for broken bones because they partially pass through you. But be careful of the __microwave__ range! Frequencies in this range can cook you just as they cook your food. Your skin can be damaged by __ultraviolet__ frequencies, if you do not take care. But __infrared__ can help you feel warm, even if you cannot see it.
The electromagnetic **spectrum** is the range of all possible frequencies of electromagnetic radiation. A common name for the electromagnetic radiation that humans can see is **visible** light. What humans call white light is actually made up of all of the colors in the **rainbow**. The entire range of frequencies, however, extends from far below to far above what can be seen by the human eye. Light is energy that travels like a **wave**.
A very low frequency might have a **wavelength** that is longer than a **kilometer**, whereas a very high frequency might be shorter than an **atom**. Humans use many parts of the electromagnetic spectrum that cannot be seen. For example, a **radio** signal will pass through you like you are a window, but a proper antenna can capture the signal so it can be transformed into something you can hear. Other frequencies are used in medicine. For example, **x-rays** are used to check for broken bones because they partially pass through you.
But be careful of the **microwave** range! Frequencies in this range can cook you just as they cook your food. Your skin can be damaged by **ultraviolet** frequencies, if you do not take care. But **infrared** can help you feel warm, even if you cannot see it.