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Flashcards in Final Exam 2017 Deck (100)
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1

What is the term for radioisotopes that are used to study chemical reactions and molecular structures?

Tracers

2

What is the term for radiation that carries energy and potential harm and causes electrons to be ejected from atoms and molecules forming ions?

Ionizing Radiation

3

What are radioactive substances because they have unstable nuclei?

Radioisotopes

4

What is the term for the process that uranium give off rays?

Radioactivity

5

What is a control method for neutrons that involves decreasing the number of slow neutrons?

Neutron Absorption

6

What is the term for when the nuclei of certain isotopes are bombarded with neutrons splitter the nucleus into smaller fragments?

Fission

7

What is the term for the time required for half of the atoms of a radioisotope to emit radiation and to decay?

Half-life

8

What is the device that uses a phosphor to detect radiation?

Scintillation Counter

9

What contains 2 protons and 2 neutrons and has a double positive charge?

Alpha Particle

10

What is the term for a relatively constant level of radiation?

Background radiation

11

What is the SI unit for measuring the amount you are exposed to ionizing radiation?

Gray

12

What is the term for the changes in the structure of DNA that fuels evolution?

Mutations

13

What is a gas filled metal tube used to detect radiation?

Geiger Counter

14

What is the term for penetrating rays emitted by a radioactive source?

Radiation

15

What is the term for a form of ionizing radiation that results from changes in the nuclei of atoms?

Nuclear Radiation

16

What is a factor in the materials' ability to warm up (amount of energy needed to raise 1 gram - 1* Celsius)?

Heat Capacity

17

What is the result of simultaneous collisions of billions upon billions of gas particles with an object?

Gas Pressure

18

What gases are propellants used in aerosol cans and as coolants in fridges and air conditioners and solvents for cleaning microchips?

Chlorofluorocarbons

19

What is the layer of gas that surrounds the earth and protects us from UV rays, it is only about 3 mm thick?

Ozone

20

What is the process mammalian so use to convert oxygen and sugar into carbon dioxide and water?

Respiration

21

What is the outermost layer of the atmosphere that contains electrically charged particles called ions a reflects radio waves?

Thermosphere

22

What is an unstable nucleus that loses energy by emitting radiation during a process?

Radioactive Decay

23

What is the term for the atoms of the same element with a different number of neutrons?

Isotopes

24

What consists of fast-moving electrons formed by the decomposing of a neutron of an atom?

Beta Radiation

25

What is the term for a disease where cell growth and metabolism is out of control?

Cancer

26

What is the term for when 2 nuclei combine to produce a nucleus of a heavier mass?

Fusion

27

What is the term for the cancer of the while blood cells?

Leukemia

28

What is the term for the number of ionizations within a given volume?

Radiation Density

29

What do we use to measure the ionizing effect of living organisms?

REM

30

What are the rods of cadmium that are used to increase or decrease the amount of energy produced?

Control Rods