Glencoe Physical Science

Chapter 18: Radioactivity and Nuclear Reactions

Section 4 Self-Check Quiz-Eng.

1
During nuclear fission, a nucleus __________.
A)grows
B)divides
C)shrinks
D)combines with another
2
Only nuclei with __________ atomic numbers can undergo fission.
A)small
B)even
C)odd
D)large
3
What is the term for an ongoing series of nuclear reactions?
A)fission
B)chain reaction
C)fusion
D)nuclear
4
The __________ of a reaction is the amount of fissionable material to make each reaction produce one more.
A)ultimate mass
B)critical mass
C)atomic number
D)atomic weight
5
When two smaller nuclei come together, it is called __________.
A)fission
B)fusion
C)chain reaction
D)critical mass
6
In the Sun, hydrogen atoms fuse together to form __________.
A)helium
B)mercury
C)oxygen
D)nitrogen
7
What is a use of radioactive materials in medicine?
A)oxygen masks
B)antibiotics
C)tracers
D)heart monitors
8
How is radiation used to treat cancer?
A)Radiation is used to stimulate the growth of cancer cells.
B)Cancer cells are bombarded with radiation and become inactive.
C)Cancer cells are burned up by radiation.
D)Radiation melts cancer cells.
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