23.1

Question 1

photosphere

Answer 1

innermost layer of the suns atmosphere that is also its visible surface
average temp of 5800K
most visible light comes from here

Question 2

chromosphere

Answer 2

middle layer of the suns atmosphere above the photosphere and below the corona
temp of 30K
2500km thick

Question 3

corona

Answer 3

outermost layer of the suns atmosphere
3-5m K
25000km thick

Question 4

solar wind

Answer 4

wind charged particles that slows throughout the solar system

Question 5

is solar wind uniform

Answer 5

no

Question 6

the energy from solar wind goes where

Answer 6

it gets trapped in 2 large rings called the van allen belts
produces auroras

Question 7

sunspots

Answer 7

dark spots on the surface of the photosphere

Question 8

sunspot cycle

Answer 8

the change in the number of sunspots from max to min and then back to min again

Question 9

how long does it take to complete a sunspot cycle

Answer 9

11 years

Question 10

coronal holes

Answer 10

located over sunspots groups
areas of low density in the gas of the corona

Question 11

solar flares

Answer 11

violent eruptions of particles and radiation from the surface of the sun

Question 12

prominence

Answer 12

an arc of gas ejected from the chromosphere

Question 13

fusion

Answer 13

the combination of lightweight atomic nuclei into heavier nuclei

Question 14

how do astronomers learn about starlight

Answer 14

spectrometer

Question 15

spectrometer

Answer 15

a device that separates light into different colors or wavelengths

Question 16

spectrum

Answer 16

light passing through a spectrometer that produces a display of colors and lines

Question 17

3 types of spectra

Answer 17

absorption emission and continuous

Question 18

scientists use which spectra for stars

Answer 18

absorption (dark lines)

Question 19

the sun is primarily composed of

Answer 19

hydrogen 71
helium 27.1
other 1.9