WorksheetsUnit 7: Radioactivity Ticket 4
Total questions: 5
Worksheet time: 3mins
Name
Class
Date
1.
Q1.
What does the activity of a radioactive source measure?
a)
The mass of the radioactive material
b)
The number of neutrons in the nucleus
c)
The number of decays per second
d)
The half-life of the isotope
2.
Q2.
Which unit is used to measure radioactive activity?
a)
Joule
b)
Becquerel
c)
Sievert
d)
Gray
3.
Q3.
What happens to the activity of a radioactive source over time?
a)
It increases
b)
It remains constant
c)
It decreases
d)
It fluctuates randomly
4.
Q4.
Which of the following is NOT a source of background radiation?
a)
Cosmic rays
b)
Radon gas
c)
5G signals
d)
Radioactive rocks
5.
Q5.
If a radioactive isotope emits 24 alpha particles every second, what is its activity in becquerel? Ignore background radiation.
a)
12
b)
24
c)
48
d)
Not enough information
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