Chapter 12 Terms Flashcards Preview

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Flashcards in Chapter 12 Terms Deck (22):
1

Chromosphere

is the lower part of the Sun’s outer atmosphere that lies directly above the Sun’s visible surface

2

Convection Zone

is the region immediately below the Sun’s visible surface in which its heat is carried by convection

3

Corona

is the outer, hottest part of the Sun’s atmosphere

4

Coronal Hole

is a low-density region in the Sun’s corona

5

Cosmic Rays

are extremely energetic particles traveling at nearly the speed of light

6

Granulation

is the texture seen in the Sun’s photosphere

7

Hydrostatic Equilibrium

is the condition in which pressure and gravitational forces in a star or planet are in balance

8

Maunder Minimum

is the time period from about A.D. 1600 to 1740, during which the Sun was relatively inactive

9

Neutrino

are tiny neutral particles with little or no mass and immense penetrating power.
Nuclear Fusion is the binding of two light nuclei to form a heavier nucleus, with some nuclear mass converted to energy

10

Perfect Gas Law or Ideal Gas

is a law relating the pressure, density, and temperature of a gas

11

Photosphere

is the visible surface of the Sun

12

Pressure

is the force exerted by a substance such as gas on an area divided by that area

13

Prominences

is a cloud of hot gas in the Sun’s outer atmosphere

14

Proton-Proton Chain

is the nuclear fusion process that converts hydrogen into helium in stars like the Sun and thereby generates their energy

15

Radiate Zone

is the region inside a star where its energy is carried outward by radiation

16

Solar Cycle

is the cyclic change in solar activity

17

Solar Flare

is a sudden increase in brightness of a small region on the Sun

18

Solar Wind

is the outflow of low-density hot gas from the Sun’s upper atmosphere

19

Spicule

is a hot, thin column of gas in the Sun’s chromosphere

20

Strong Force

is the force that holds protons and neutrons together

21

Sunspot

is a dark, cooler region on the Sun’s visible surface created by intense magnetic fields

22

Zeeman Effect

is the splitting of a single spectrum line into two or three lines by a magnetic field